Interfejsy API do skanowania paragonów automatyzują pobieranie danych z paragonów przy użyciu technologii OCR, co znacznie ogranicza błędy związane z ręcznym wprowadzaniem danych i przyspiesza przetwarzanie. Ten przewodnik pokazuje, jak używać IronOCR w języku C# do dokładnego wyodrębniania nazw dostawców, dat, pozycji, cen i sum z obrazów paragonów, z wbudowanym przetwarzaniem wstępnym obrazów i obsługą wielu formatów.
IronOCR to elastyczna biblioteka OCR, która pozwala na niezawodne wyodrębnianie tekstu ze skanowanych dokumentów, obrazów i plików PDF. Dzięki zaawansowanym algorytmom, wizji komputerowej i modelom uczenia maszynowego IronOCR zapewnia wysoką dokładność nawet w trudnych sytuacjach. Biblioteka obsługuje wiele języków i stylów czcionek, dzięki czemu nadaje się do zastosowań globalnych. Włączając IronOCR do swoich aplikacji, możesz zautomatyzować wprowadzanie danych i analizę tekstu, zwiększając produktywność.
IronOCR pobiera tekst z dokumentów, zdjęć, zrzutów ekranu i obrazu z kamery na żywo w postaci odpowiedzi JSON. Wykorzystując zaawansowane algorytmy i uczenie maszynowe, IronOCR analizuje dane obrazówe, rozpoznaje znaki i przekształca je w tekst nadający się do odczytu maszynowego. Biblioteka wykorzystuje technologię Tesseract 5 wzbogaconą o autorskie ulepszenia zapewniające najwyższą dokładność.
IronOCR doskonale radzi sobie ze skanami o niskiej jakości, różnymi formatami paragonów i różnymi orientacjami. Wbudowane filtry przetwarzania wstępnego obrazów automatycznie poprawiają jakość obrazu przed przetwarzaniem, zapewniając optymalne wyniki nawet w przypadku pogniecionych lub wyblakłych paragonów.
Przed rozpoczęciem pracy z IronOCR upewnij się, że spełnione są następujące warunki wstępne:
Otwórz program Visual Studio, przejdź do menu Pliki, najedź kursorem na opcję Nowy i kliknij Projekt.
Nowy obraz projektu
Wybierz opcję Aplikacja konsolowa i kliknij Dalej. Ten szablon jest idealny do nauki obsługi IronOCR przed wdrożeniem go w aplikacjach internetowych.
Aplikacja konsolowa
Wpisz nazwę projektu i lokalizację, a następnie kliknij Dalej. Wybierz opisową nazwę, na przykład 'ReceiptScannerAPI'.
Konfiguracja projektu
Wybierz .NET 5.0 lub nowszą wersję, aby uzyskać optymalną kompatybilność, a następnie kliknij Utwórz.
Docelowa platforma
Dostępne są dwie proste metody instalacji:
Przejdź do Narzędzia > Menedżer pakietów NuGet > Zarządzaj pakietami NuGet dla rozwiązania
Menedżer pakietów NuGet
Wyszukaj IronOCR i zainstaluj pakiet. W przypadku paragonów w językach innych niż angielski należy zainstalować pakiety dla danego języka.
IronOCR
Przejdź do Narzędzia > Menedżer pakietów NuGet > Konsola menedżera pakietów
Wpisz następujące polecenie:
Konsola menedżera pakietów
Wyodrębnij dane z paragonu za pomocą zaledwie kilku wierszy kodu:
using IronOcr;
using System;
var ocr = new IronTesseract();
// Configure for receipt scanning
ocr.Configuration.ReadBarCodes = true;
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% ";
using (var input = new OcrInput(@"receipt.jpg"))
{
// Apply automatic image enhancement
input.DeNoise();
input.Deskew();
input.EnhanceResolution(225);
// Extract text from receipt
var result = ocr.Read(input);
// Display extracted text and confidence
Console.WriteLine($"Extracted Text:\n{result.Text}");
Console.WriteLine($"\nConfidence: {result.Confidence}%");
}Imports IronOcr
Imports System
Dim ocr = New IronTesseract()
' Configure for receipt scanning
ocr.Configuration.ReadBarCodes = True
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% "
Using input = New OcrInput("receipt.jpg")
' Apply automatic image enhancement
input.DeNoise()
input.Deskew()
input.EnhanceResolution(225)
' Extract text from receipt
Dim result = ocr.Read(input)
' Display extracted text and confidence
Console.WriteLine($"Extracted Text:{vbCrLf}{result.Text}")
Console.WriteLine($"{vbCrLf}Confidence: {result.Confidence}%")
End UsingImports IronOcr
Imports System
Dim ocr = New IronTesseract()
' Configure for receipt scanning
ocr.Configuration.ReadBarCodes = True
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% "
Using input = New OcrInput("receipt.jpg")
' Apply automatic image enhancement
input.DeNoise()
input.Deskew()
input.EnhanceResolution(225)
' Extract text from receipt
Dim result = ocr.Read(input)
' Display extracted text and confidence
Console.WriteLine($"Extracted Text:{vbCrLf}{result.Text}")
Console.WriteLine($"{vbCrLf}Confidence: {result.Confidence}%")
End Using
IronOCR wyodrębnia pozycje, ceny, podatki i sumy z różnych typów dokumentów. Biblioteka IronOCR obsługuje pliki PDF, wielostronicowe pliki TIFF oraz różne formaty obrazów.
using IronOcr;
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
class ReceiptScanner
{
static void Main()
{
var ocr = new IronTesseract();
// Configure OCR for optimal receipt reading
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% ";
ocr.Configuration.BlackListCharacters = "~`@#*_}{][|\\";
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;
// Load the image of the receipt
using (var input = new OcrInput(@"r2.png"))
{
// Apply image enhancement filters
input.Deskew(); // Fix image rotation
input.EnhanceResolution(225); // Optimal DPI for receipts
input.DeNoise(); // Remove background noise
input.Sharpen(); // Improve text clarity
// Perform OCR on the input image
var result = ocr.Read(input);
// Regular expression patterns to extract relevant details from the OCR result
var descriptionPattern = @"\w+\s+(.*?)\s+(\d+\.\d+)\s+Units\s+(\d+\.\d+)\s+Tax15%\s+\$(\d+\.\d+)";
var pricePattern = @"\$\d+(\.\d{2})?";
var datePattern = @"\d{1,2}[/-]\d{1,2}[/-]\d{2,4}";
// Variables to store extracted data
var descriptions = new List<string>();
var unitPrices = new List<decimal>();
var taxes = new List<decimal>();
var amounts = new List<decimal>();
var lines = result.Text.Split('\n');
foreach (var line in lines)
{
// Match each line against the description pattern
var descriptionMatch = Regex.Match(line, descriptionPattern);
if (descriptionMatch.Success)
{
descriptions.Add(descriptionMatch.Groups[1].Value.Trim());
unitPrices.Add(decimal.Parse(descriptionMatch.Groups[2].Value));
// Calculate tax and total amount for each item
var tax = unitPrices[unitPrices.Count - 1] * 0.15m;
taxes.Add(tax);
amounts.Add(unitPrices[unitPrices.Count - 1] + tax);
}
// Extract date if found
var dateMatch = Regex.Match(line, datePattern);
if (dateMatch.Success)
{
Console.WriteLine($"Receipt Date: {dateMatch.Value}");
}
}
// Output the extracted data
for (int i = 0; i < descriptions.Count; i++)
{
Console.WriteLine($"Description: {descriptions[i]}");
Console.WriteLine($"Quantity: 1.00 Units");
Console.WriteLine($"Unit Price: ${unitPrices[i]:0.00}");
Console.WriteLine($"Taxes: ${taxes[i]:0.00}");
Console.WriteLine($"Amount: ${amounts[i]:0.00}");
Console.WriteLine("-----------------------");
}
// Calculate and display totals
var subtotal = unitPrices.Sum();
var totalTax = taxes.Sum();
var grandTotal = amounts.Sum();
Console.WriteLine($"\nSubtotal: ${subtotal:0.00}");
Console.WriteLine($"Total Tax: ${totalTax:0.00}");
Console.WriteLine($"Grand Total: ${grandTotal:0.00}");
}
}
}using IronOcr;
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
class ReceiptScanner
{
static void Main()
{
var ocr = new IronTesseract();
// Configure OCR for optimal receipt reading
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% ";
ocr.Configuration.BlackListCharacters = "~`@#*_}{][|\\";
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;
// Load the image of the receipt
using (var input = new OcrInput(@"r2.png"))
{
// Apply image enhancement filters
input.Deskew(); // Fix image rotation
input.EnhanceResolution(225); // Optimal DPI for receipts
input.DeNoise(); // Remove background noise
input.Sharpen(); // Improve text clarity
// Perform OCR on the input image
var result = ocr.Read(input);
// Regular expression patterns to extract relevant details from the OCR result
var descriptionPattern = @"\w+\s+(.*?)\s+(\d+\.\d+)\s+Units\s+(\d+\.\d+)\s+Tax15%\s+\$(\d+\.\d+)";
var pricePattern = @"\$\d+(\.\d{2})?";
var datePattern = @"\d{1,2}[/-]\d{1,2}[/-]\d{2,4}";
// Variables to store extracted data
var descriptions = new List<string>();
var unitPrices = new List<decimal>();
var taxes = new List<decimal>();
var amounts = new List<decimal>();
var lines = result.Text.Split('\n');
foreach (var line in lines)
{
// Match each line against the description pattern
var descriptionMatch = Regex.Match(line, descriptionPattern);
if (descriptionMatch.Success)
{
descriptions.Add(descriptionMatch.Groups[1].Value.Trim());
unitPrices.Add(decimal.Parse(descriptionMatch.Groups[2].Value));
// Calculate tax and total amount for each item
var tax = unitPrices[unitPrices.Count - 1] * 0.15m;
taxes.Add(tax);
amounts.Add(unitPrices[unitPrices.Count - 1] + tax);
}
// Extract date if found
var dateMatch = Regex.Match(line, datePattern);
if (dateMatch.Success)
{
Console.WriteLine($"Receipt Date: {dateMatch.Value}");
}
}
// Output the extracted data
for (int i = 0; i < descriptions.Count; i++)
{
Console.WriteLine($"Description: {descriptions[i]}");
Console.WriteLine($"Quantity: 1.00 Units");
Console.WriteLine($"Unit Price: ${unitPrices[i]:0.00}");
Console.WriteLine($"Taxes: ${taxes[i]:0.00}");
Console.WriteLine($"Amount: ${amounts[i]:0.00}");
Console.WriteLine("-----------------------");
}
// Calculate and display totals
var subtotal = unitPrices.Sum();
var totalTax = taxes.Sum();
var grandTotal = amounts.Sum();
Console.WriteLine($"\nSubtotal: ${subtotal:0.00}");
Console.WriteLine($"Total Tax: ${totalTax:0.00}");
Console.WriteLine($"Grand Total: ${grandTotal:0.00}");
}
}
}Imports IronOcr
Imports System
Imports System.Collections.Generic
Imports System.Text.RegularExpressions
Class ReceiptScanner
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure OCR for optimal receipt reading
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% "
ocr.Configuration.BlackListCharacters = "~`@#*_}{][|\"
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5
' Load the image of the receipt
Using input = New OcrInput("r2.png")
' Apply image enhancement filters
input.Deskew() ' Fix image rotation
input.EnhanceResolution(225) ' Optimal DPI for receipts
input.DeNoise() ' Remove background noise
input.Sharpen() ' Improve text clarity
' Perform OCR on the input image
Dim result = ocr.Read(input)
' Regular expression patterns to extract relevant details from the OCR result
Dim descriptionPattern = "\w+\s+(.*?)\s+(\d+\.\d+)\s+Units\s+(\d+\.\d+)\s+Tax15%\s+\$(\d+\.\d+)"
Dim pricePattern = "\$\d+(\.\d{2})?"
Dim datePattern = "\d{1,2}[/-]\d{1,2}[/-]\d{2,4}"
' Variables to store extracted data
Dim descriptions = New List(Of String)()
Dim unitPrices = New List(Of Decimal)()
Dim taxes = New List(Of Decimal)()
Dim amounts = New List(Of Decimal)()
Dim lines = result.Text.Split(ControlChars.Lf)
For Each line In lines
' Match each line against the description pattern
Dim descriptionMatch = Regex.Match(line, descriptionPattern)
If descriptionMatch.Success Then
descriptions.Add(descriptionMatch.Groups(1).Value.Trim())
unitPrices.Add(Decimal.Parse(descriptionMatch.Groups(2).Value))
' Calculate tax and total amount for each item
Dim tax = unitPrices(unitPrices.Count - 1) * 0.15D
taxes.Add(tax)
amounts.Add(unitPrices(unitPrices.Count - 1) + tax)
End If
' Extract date if found
Dim dateMatch = Regex.Match(line, datePattern)
If dateMatch.Success Then
Console.WriteLine($"Receipt Date: {dateMatch.Value}")
End If
Next
' Output the extracted data
For i As Integer = 0 To descriptions.Count - 1
Console.WriteLine($"Description: {descriptions(i)}")
Console.WriteLine("Quantity: 1.00 Units")
Console.WriteLine($"Unit Price: ${unitPrices(i):0.00}")
Console.WriteLine($"Taxes: ${taxes(i):0.00}")
Console.WriteLine($"Amount: ${amounts(i):0.00}")
Console.WriteLine("-----------------------")
Next
' Calculate and display totals
Dim subtotal = unitPrices.Sum()
Dim totalTax = taxes.Sum()
Dim grandTotal = amounts.Sum()
Console.WriteLine(vbCrLf & $"Subtotal: ${subtotal:0.00}")
Console.WriteLine($"Total Tax: ${totalTax:0.00}")
Console.WriteLine($"Grand Total: ${grandTotal:0.00}")
End Using
End Sub
End ClassImports IronOcr
Imports System
Imports System.Collections.Generic
Imports System.Text.RegularExpressions
Class ReceiptScanner
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure OCR for optimal receipt reading
ocr.Configuration.WhiteListCharacters = "0123456789.$,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz% "
ocr.Configuration.BlackListCharacters = "~`@#*_}{][|\"
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5
' Load the image of the receipt
Using input = New OcrInput("r2.png")
' Apply image enhancement filters
input.Deskew() ' Fix image rotation
input.EnhanceResolution(225) ' Optimal DPI for receipts
input.DeNoise() ' Remove background noise
input.Sharpen() ' Improve text clarity
' Perform OCR on the input image
Dim result = ocr.Read(input)
' Regular expression patterns to extract relevant details from the OCR result
Dim descriptionPattern = "\w+\s+(.*?)\s+(\d+\.\d+)\s+Units\s+(\d+\.\d+)\s+Tax15%\s+\$(\d+\.\d+)"
Dim pricePattern = "\$\d+(\.\d{2})?"
Dim datePattern = "\d{1,2}[/-]\d{1,2}[/-]\d{2,4}"
' Variables to store extracted data
Dim descriptions = New List(Of String)()
Dim unitPrices = New List(Of Decimal)()
Dim taxes = New List(Of Decimal)()
Dim amounts = New List(Of Decimal)()
Dim lines = result.Text.Split(ControlChars.Lf)
For Each line In lines
' Match each line against the description pattern
Dim descriptionMatch = Regex.Match(line, descriptionPattern)
If descriptionMatch.Success Then
descriptions.Add(descriptionMatch.Groups(1).Value.Trim())
unitPrices.Add(Decimal.Parse(descriptionMatch.Groups(2).Value))
' Calculate tax and total amount for each item
Dim tax = unitPrices(unitPrices.Count - 1) * 0.15D
taxes.Add(tax)
amounts.Add(unitPrices(unitPrices.Count - 1) + tax)
End If
' Extract date if found
Dim dateMatch = Regex.Match(line, datePattern)
If dateMatch.Success Then
Console.WriteLine($"Receipt Date: {dateMatch.Value}")
End If
Next
' Output the extracted data
For i As Integer = 0 To descriptions.Count - 1
Console.WriteLine($"Description: {descriptions(i)}")
Console.WriteLine("Quantity: 1.00 Units")
Console.WriteLine($"Unit Price: ${unitPrices(i):0.00}")
Console.WriteLine($"Taxes: ${taxes(i):0.00}")
Console.WriteLine($"Amount: ${amounts(i):0.00}")
Console.WriteLine("-----------------------")
Next
' Calculate and display totals
Dim subtotal = unitPrices.Sum()
Dim totalTax = taxes.Sum()
Dim grandTotal = amounts.Sum()
Console.WriteLine(vbCrLf & $"Subtotal: ${subtotal:0.00}")
Console.WriteLine($"Total Tax: ${totalTax:0.00}")
Console.WriteLine($"Grand Total: ${grandTotal:0.00}")
End Using
End Sub
End ClassKluczowe techniki dokładnego skanowania paragonów:
Wynik
Wyodrębnij pełną treść paragonu z zachowaniem formatowania:
using IronOcr;
using System;
using System.Linq;
class WholeReceiptExtractor
{
static void Main()
{
var ocr = new IronTesseract();
// Configure for receipt scanning
ocr.Configuration.ReadBarCodes = true; // Enable barcode detection
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5; // Use latest engine
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm; // Best accuracy
using (var input = new OcrInput(@"r3.png"))
{
// Apply automatic image correction
input.WithTitle("Receipt Scan");
// Use computer vision to find text regions
var textRegions = input.FindTextRegions();
Console.WriteLine($"Found {textRegions.Count()} text regions");
// Apply optimal filters for receipt processing
input.ApplyOcrInputFilters();
// Perform OCR on the entire receipt
var result = ocr.Read(input);
// Display extracted text
Console.WriteLine("=== EXTRACTED RECEIPT TEXT ===");
Console.WriteLine(result.Text);
// Get detailed results
Console.WriteLine($"\n=== OCR STATISTICS ===");
Console.WriteLine($"OCR Confidence: {result.Confidence:F2}%");
Console.WriteLine($"Pages Processed: {result.Pages.Length}");
Console.WriteLine($"Paragraphs Found: {result.Paragraphs.Length}");
Console.WriteLine($"Lines Detected: {result.Lines.Length}");
Console.WriteLine($"Words Recognized: {result.Words.Length}");
// Extract any barcodes found
if (result.Barcodes.Any())
{
Console.WriteLine("\n=== BARCODES DETECTED ===");
foreach(var barcode in result.Barcodes)
{
Console.WriteLine($"Type: {barcode.Type}");
Console.WriteLine($"Value: {barcode.Value}");
Console.WriteLine($"Location: X={barcode.X}, Y={barcode.Y}");
}
}
// Save as searchable PDF
result.SaveAsSearchablePdf("receipt_searchable.pdf");
Console.WriteLine("\nSearchable PDF saved as: receipt_searchable.pdf");
// Export as hOCR for preservation
result.SaveAsHocrFile("receipt_hocr.html");
Console.WriteLine("hOCR file saved as: receipt_hocr.html");
}
}
}using IronOcr;
using System;
using System.Linq;
class WholeReceiptExtractor
{
static void Main()
{
var ocr = new IronTesseract();
// Configure for receipt scanning
ocr.Configuration.ReadBarCodes = true; // Enable barcode detection
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5; // Use latest engine
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm; // Best accuracy
using (var input = new OcrInput(@"r3.png"))
{
// Apply automatic image correction
input.WithTitle("Receipt Scan");
// Use computer vision to find text regions
var textRegions = input.FindTextRegions();
Console.WriteLine($"Found {textRegions.Count()} text regions");
// Apply optimal filters for receipt processing
input.ApplyOcrInputFilters();
// Perform OCR on the entire receipt
var result = ocr.Read(input);
// Display extracted text
Console.WriteLine("=== EXTRACTED RECEIPT TEXT ===");
Console.WriteLine(result.Text);
// Get detailed results
Console.WriteLine($"\n=== OCR STATISTICS ===");
Console.WriteLine($"OCR Confidence: {result.Confidence:F2}%");
Console.WriteLine($"Pages Processed: {result.Pages.Length}");
Console.WriteLine($"Paragraphs Found: {result.Paragraphs.Length}");
Console.WriteLine($"Lines Detected: {result.Lines.Length}");
Console.WriteLine($"Words Recognized: {result.Words.Length}");
// Extract any barcodes found
if (result.Barcodes.Any())
{
Console.WriteLine("\n=== BARCODES DETECTED ===");
foreach(var barcode in result.Barcodes)
{
Console.WriteLine($"Type: {barcode.Type}");
Console.WriteLine($"Value: {barcode.Value}");
Console.WriteLine($"Location: X={barcode.X}, Y={barcode.Y}");
}
}
// Save as searchable PDF
result.SaveAsSearchablePdf("receipt_searchable.pdf");
Console.WriteLine("\nSearchable PDF saved as: receipt_searchable.pdf");
// Export as hOCR for preservation
result.SaveAsHocrFile("receipt_hocr.html");
Console.WriteLine("hOCR file saved as: receipt_hocr.html");
}
}
}Imports IronOcr
Imports System
Imports System.Linq
Class WholeReceiptExtractor
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure for receipt scanning
ocr.Configuration.ReadBarCodes = True ' Enable barcode detection
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5 ' Use latest engine
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm ' Best accuracy
Using input = New OcrInput("r3.png")
' Apply automatic image correction
input.WithTitle("Receipt Scan")
' Use computer vision to find text regions
Dim textRegions = input.FindTextRegions()
Console.WriteLine($"Found {textRegions.Count()} text regions")
' Apply optimal filters for receipt processing
input.ApplyOcrInputFilters()
' Perform OCR on the entire receipt
Dim result = ocr.Read(input)
' Display extracted text
Console.WriteLine("=== EXTRACTED RECEIPT TEXT ===")
Console.WriteLine(result.Text)
' Get detailed results
Console.WriteLine(vbCrLf & "=== OCR STATISTICS ===")
Console.WriteLine($"OCR Confidence: {result.Confidence:F2}%")
Console.WriteLine($"Pages Processed: {result.Pages.Length}")
Console.WriteLine($"Paragraphs Found: {result.Paragraphs.Length}")
Console.WriteLine($"Lines Detected: {result.Lines.Length}")
Console.WriteLine($"Words Recognized: {result.Words.Length}")
' Extract any barcodes found
If result.Barcodes.Any() Then
Console.WriteLine(vbCrLf & "=== BARCODES DETECTED ===")
For Each barcode In result.Barcodes
Console.WriteLine($"Type: {barcode.Type}")
Console.WriteLine($"Value: {barcode.Value}")
Console.WriteLine($"Location: X={barcode.X}, Y={barcode.Y}")
Next
End If
' Save as searchable PDF
result.SaveAsSearchablePdf("receipt_searchable.pdf")
Console.WriteLine(vbCrLf & "Searchable PDF saved as: receipt_searchable.pdf")
' Export as hOCR for preservation
result.SaveAsHocrFile("receipt_hocr.html")
Console.WriteLine("hOCR file saved as: receipt_hocr.html")
End Using
End Sub
End ClassImports IronOcr
Imports System
Imports System.Linq
Class WholeReceiptExtractor
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure for receipt scanning
ocr.Configuration.ReadBarCodes = True ' Enable barcode detection
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5 ' Use latest engine
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm ' Best accuracy
Using input = New OcrInput("r3.png")
' Apply automatic image correction
input.WithTitle("Receipt Scan")
' Use computer vision to find text regions
Dim textRegions = input.FindTextRegions()
Console.WriteLine($"Found {textRegions.Count()} text regions")
' Apply optimal filters for receipt processing
input.ApplyOcrInputFilters()
' Perform OCR on the entire receipt
Dim result = ocr.Read(input)
' Display extracted text
Console.WriteLine("=== EXTRACTED RECEIPT TEXT ===")
Console.WriteLine(result.Text)
' Get detailed results
Console.WriteLine(vbCrLf & "=== OCR STATISTICS ===")
Console.WriteLine($"OCR Confidence: {result.Confidence:F2}%")
Console.WriteLine($"Pages Processed: {result.Pages.Length}")
Console.WriteLine($"Paragraphs Found: {result.Paragraphs.Length}")
Console.WriteLine($"Lines Detected: {result.Lines.Length}")
Console.WriteLine($"Words Recognized: {result.Words.Length}")
' Extract any barcodes found
If result.Barcodes.Any() Then
Console.WriteLine(vbCrLf & "=== BARCODES DETECTED ===")
For Each barcode In result.Barcodes
Console.WriteLine($"Type: {barcode.Type}")
Console.WriteLine($"Value: {barcode.Value}")
Console.WriteLine($"Location: X={barcode.X}, Y={barcode.Y}")
Next
End If
' Save as searchable PDF
result.SaveAsSearchablePdf("receipt_searchable.pdf")
Console.WriteLine(vbCrLf & "Searchable PDF saved as: receipt_searchable.pdf")
' Export as hOCR for preservation
result.SaveAsHocrFile("receipt_hocr.html")
Console.WriteLine("hOCR file saved as: receipt_hocr.html")
End Using
End Sub
End Class
Wynik działania API skanowania paragonów
IronOCR oferuje kilka zaawansowanych funkcji, które znacznie poprawiają dokładność skanowania paragonów:
// Example: Async receipt processing for high-volume scenarios
using IronOcr;
using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.IO;
class BulkReceiptProcessor
{
static async Task Main()
{
var ocr = new IronTesseract();
// Configure for optimal performance
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;
ocr.Configuration.UseMultiThreading = true;
ocr.Configuration.ProcessorCount = Environment.ProcessorCount;
// Process multiple receipts asynchronously
var receiptFiles = Directory.GetFiles(@"C:\Receipts\", "*.jpg");
var tasks = new List<Task<OcrResult>>();
foreach (var file in receiptFiles)
{
tasks.Add(ProcessReceiptAsync(ocr, file));
}
// Wait for all receipts to be processed
var results = await Task.WhenAll(tasks);
// Aggregate results
decimal totalAmount = 0;
foreach (var result in results)
{
// Extract total from each receipt
var match = System.Text.RegularExpressions.Regex.Match(
result.Text, @"Total:?\s*\$?(\d+\.\d{2})");
if (match.Success && decimal.TryParse(match.Groups[1].Value, out var amount))
{
totalAmount += amount;
}
}
Console.WriteLine($"Processed {results.Length} receipts");
Console.WriteLine($"Combined total: ${totalAmount:F2}");
}
static async Task<OcrResult> ProcessReceiptAsync(IronTesseract ocr, string filePath)
{
using (var input = new OcrInput(filePath))
{
// Apply preprocessing
input.DeNoise();
input.Deskew();
input.EnhanceResolution(200);
// Process asynchronously
return await ocr.ReadAsync(input);
}
}
}// Example: Async receipt processing for high-volume scenarios
using IronOcr;
using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.IO;
class BulkReceiptProcessor
{
static async Task Main()
{
var ocr = new IronTesseract();
// Configure for optimal performance
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5;
ocr.Configuration.UseMultiThreading = true;
ocr.Configuration.ProcessorCount = Environment.ProcessorCount;
// Process multiple receipts asynchronously
var receiptFiles = Directory.GetFiles(@"C:\Receipts\", "*.jpg");
var tasks = new List<Task<OcrResult>>();
foreach (var file in receiptFiles)
{
tasks.Add(ProcessReceiptAsync(ocr, file));
}
// Wait for all receipts to be processed
var results = await Task.WhenAll(tasks);
// Aggregate results
decimal totalAmount = 0;
foreach (var result in results)
{
// Extract total from each receipt
var match = System.Text.RegularExpressions.Regex.Match(
result.Text, @"Total:?\s*\$?(\d+\.\d{2})");
if (match.Success && decimal.TryParse(match.Groups[1].Value, out var amount))
{
totalAmount += amount;
}
}
Console.WriteLine($"Processed {results.Length} receipts");
Console.WriteLine($"Combined total: ${totalAmount:F2}");
}
static async Task<OcrResult> ProcessReceiptAsync(IronTesseract ocr, string filePath)
{
using (var input = new OcrInput(filePath))
{
// Apply preprocessing
input.DeNoise();
input.Deskew();
input.EnhanceResolution(200);
// Process asynchronously
return await ocr.ReadAsync(input);
}
}
}' Example: Async receipt processing for high-volume scenarios
Imports IronOcr
Imports System
Imports System.Threading.Tasks
Imports System.Collections.Generic
Imports System.IO
Class BulkReceiptProcessor
Shared Async Function Main() As Task
Dim ocr = New IronTesseract()
' Configure for optimal performance
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5
ocr.Configuration.UseMultiThreading = True
ocr.Configuration.ProcessorCount = Environment.ProcessorCount
' Process multiple receipts asynchronously
Dim receiptFiles = Directory.GetFiles("C:\Receipts\", "*.jpg")
Dim tasks = New List(Of Task(Of OcrResult))()
For Each file In receiptFiles
tasks.Add(ProcessReceiptAsync(ocr, file))
Next
' Wait for all receipts to be processed
Dim results = Await Task.WhenAll(tasks)
' Aggregate results
Dim totalAmount As Decimal = 0
For Each result In results
' Extract total from each receipt
Dim match = System.Text.RegularExpressions.Regex.Match(result.Text, "Total:?\s*\$?(\d+\.\d{2})")
If match.Success AndAlso Decimal.TryParse(match.Groups(1).Value, amount) Then
totalAmount += amount
End If
Next
Console.WriteLine($"Processed {results.Length} receipts")
Console.WriteLine($"Combined total: ${totalAmount:F2}")
End Function
Shared Async Function ProcessReceiptAsync(ocr As IronTesseract, filePath As String) As Task(Of OcrResult)
Using input = New OcrInput(filePath)
' Apply preprocessing
input.DeNoise()
input.Deskew()
input.EnhanceResolution(200)
' Process asynchronously
Return Await ocr.ReadAsync(input)
End Using
End Function
End Class' Example: Async receipt processing for high-volume scenarios
Imports IronOcr
Imports System
Imports System.Threading.Tasks
Imports System.Collections.Generic
Imports System.IO
Class BulkReceiptProcessor
Shared Async Function Main() As Task
Dim ocr = New IronTesseract()
' Configure for optimal performance
ocr.Configuration.TesseractVersion = TesseractVersion.Tesseract5
ocr.Configuration.UseMultiThreading = True
ocr.Configuration.ProcessorCount = Environment.ProcessorCount
' Process multiple receipts asynchronously
Dim receiptFiles = Directory.GetFiles("C:\Receipts\", "*.jpg")
Dim tasks = New List(Of Task(Of OcrResult))()
For Each file In receiptFiles
tasks.Add(ProcessReceiptAsync(ocr, file))
Next
' Wait for all receipts to be processed
Dim results = Await Task.WhenAll(tasks)
' Aggregate results
Dim totalAmount As Decimal = 0
For Each result In results
' Extract total from each receipt
Dim match = System.Text.RegularExpressions.Regex.Match(result.Text, "Total:?\s*\$?(\d+\.\d{2})")
If match.Success AndAlso Decimal.TryParse(match.Groups(1).Value, amount) Then
totalAmount += amount
End If
Next
Console.WriteLine($"Processed {results.Length} receipts")
Console.WriteLine($"Combined total: ${totalAmount:F2}")
End Function
Shared Async Function ProcessReceiptAsync(ocr As IronTesseract, filePath As String) As Task(Of OcrResult)
Using input = New OcrInput(filePath)
' Apply preprocessing
input.DeNoise()
input.Deskew()
input.EnhanceResolution(200)
' Process asynchronously
Return Await ocr.ReadAsync(input)
End Using
End Function
End ClassSkanowanie paragonów wiąże się z wyjątkowymi wyzwaniami, w których rozwiązaniu pomaga IronOCR:
Formaty paragonów różnią się znacznie w zależności od sprzedawcy. IronOCR oferuje elastyczne podejście:
using IronOcr;
using System;
using System.Collections.Generic;
using System.Linq;
class ReceiptLayoutHandler
{
static void Main()
{
var ocr = new IronTesseract();
// Configure for different receipt layouts
ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd;
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm;
using (var input = new OcrInput(@"complex_receipt.jpg"))
{
// Apply region-specific processing
var cropRegion = new CropRectangle(x: 0, y: 100, width: 400, height: 800);
input.AddImage(@"complex_receipt.jpg", cropRegion);
// Process with confidence tracking
var result = ocr.Read(input);
// Parse using confidence scores
var highConfidenceLines = result.Lines
.Where(line => line.Confidence > 85)
.Select(line => line.Text)
.ToList();
// Extract data with fallback strategies
var total = ExtractTotal(highConfidenceLines)
?? ExtractTotalAlternative(result.Text);
Console.WriteLine($"Receipt Total: {total}");
}
}
static decimal? ExtractTotal(List<string> lines)
{
// Primary extraction method
foreach (var line in lines)
{
if (line.Contains("TOTAL") &&
System.Text.RegularExpressions.Regex.IsMatch(line, @"\d+\.\d{2}"))
{
var match = System.Text.RegularExpressions.Regex.Match(line, @"(\d+\.\d{2})");
if (decimal.TryParse(match.Value, out var total))
return total;
}
}
return null;
}
static decimal? ExtractTotalAlternative(string fullText)
{
// Fallback extraction method
var pattern = @"(?:Total|TOTAL|Grand Total|Amount Due).*?(\d+\.\d{2})";
var match = System.Text.RegularExpressions.Regex.Match(fullText, pattern);
if (match.Success && decimal.TryParse(match.Groups[1].Value, out var total))
return total;
return null;
}
}using IronOcr;
using System;
using System.Collections.Generic;
using System.Linq;
class ReceiptLayoutHandler
{
static void Main()
{
var ocr = new IronTesseract();
// Configure for different receipt layouts
ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd;
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm;
using (var input = new OcrInput(@"complex_receipt.jpg"))
{
// Apply region-specific processing
var cropRegion = new CropRectangle(x: 0, y: 100, width: 400, height: 800);
input.AddImage(@"complex_receipt.jpg", cropRegion);
// Process with confidence tracking
var result = ocr.Read(input);
// Parse using confidence scores
var highConfidenceLines = result.Lines
.Where(line => line.Confidence > 85)
.Select(line => line.Text)
.ToList();
// Extract data with fallback strategies
var total = ExtractTotal(highConfidenceLines)
?? ExtractTotalAlternative(result.Text);
Console.WriteLine($"Receipt Total: {total}");
}
}
static decimal? ExtractTotal(List<string> lines)
{
// Primary extraction method
foreach (var line in lines)
{
if (line.Contains("TOTAL") &&
System.Text.RegularExpressions.Regex.IsMatch(line, @"\d+\.\d{2}"))
{
var match = System.Text.RegularExpressions.Regex.Match(line, @"(\d+\.\d{2})");
if (decimal.TryParse(match.Value, out var total))
return total;
}
}
return null;
}
static decimal? ExtractTotalAlternative(string fullText)
{
// Fallback extraction method
var pattern = @"(?:Total|TOTAL|Grand Total|Amount Due).*?(\d+\.\d{2})";
var match = System.Text.RegularExpressions.Regex.Match(fullText, pattern);
if (match.Success && decimal.TryParse(match.Groups[1].Value, out var total))
return total;
return null;
}
}Imports IronOcr
Imports System
Imports System.Collections.Generic
Imports System.Linq
Class ReceiptLayoutHandler
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure for different receipt layouts
ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm
Using input = New OcrInput("complex_receipt.jpg")
' Apply region-specific processing
Dim cropRegion = New CropRectangle(x:=0, y:=100, width:=400, height:=800)
input.AddImage("complex_receipt.jpg", cropRegion)
' Process with confidence tracking
Dim result = ocr.Read(input)
' Parse using confidence scores
Dim highConfidenceLines = result.Lines _
.Where(Function(line) line.Confidence > 85) _
.Select(Function(line) line.Text) _
.ToList()
' Extract data with fallback strategies
Dim total = ExtractTotal(highConfidenceLines) _
OrElse ExtractTotalAlternative(result.Text)
Console.WriteLine($"Receipt Total: {total}")
End Using
End Sub
Shared Function ExtractTotal(lines As List(Of String)) As Decimal?
' Primary extraction method
For Each line In lines
If line.Contains("TOTAL") AndAlso _
System.Text.RegularExpressions.Regex.IsMatch(line, "\d+\.\d{2}") Then
Dim match = System.Text.RegularExpressions.Regex.Match(line, "(\d+\.\d{2})")
Dim total As Decimal
If Decimal.TryParse(match.Value, total) Then
Return total
End If
End If
Next
Return Nothing
End Function
Shared Function ExtractTotalAlternative(fullText As String) As Decimal?
' Fallback extraction method
Dim pattern = "(?:Total|TOTAL|Grand Total|Amount Due).*?(\d+\.\d{2})"
Dim match = System.Text.RegularExpressions.Regex.Match(fullText, pattern)
Dim total As Decimal
If match.Success AndAlso Decimal.TryParse(match.Groups(1).Value, total) Then
Return total
End If
Return Nothing
End Function
End ClassImports IronOcr
Imports System
Imports System.Collections.Generic
Imports System.Linq
Class ReceiptLayoutHandler
Shared Sub Main()
Dim ocr = New IronTesseract()
' Configure for different receipt layouts
ocr.Configuration.PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd
ocr.Configuration.EngineMode = TesseractEngineMode.TesseractAndLstm
Using input = New OcrInput("complex_receipt.jpg")
' Apply region-specific processing
Dim cropRegion = New CropRectangle(x:=0, y:=100, width:=400, height:=800)
input.AddImage("complex_receipt.jpg", cropRegion)
' Process with confidence tracking
Dim result = ocr.Read(input)
' Parse using confidence scores
Dim highConfidenceLines = result.Lines _
.Where(Function(line) line.Confidence > 85) _
.Select(Function(line) line.Text) _
.ToList()
' Extract data with fallback strategies
Dim total = ExtractTotal(highConfidenceLines) _
OrElse ExtractTotalAlternative(result.Text)
Console.WriteLine($"Receipt Total: {total}")
End Using
End Sub
Shared Function ExtractTotal(lines As List(Of String)) As Decimal?
' Primary extraction method
For Each line In lines
If line.Contains("TOTAL") AndAlso _
System.Text.RegularExpressions.Regex.IsMatch(line, "\d+\.\d{2}") Then
Dim match = System.Text.RegularExpressions.Regex.Match(line, "(\d+\.\d{2})")
Dim total As Decimal
If Decimal.TryParse(match.Value, total) Then
Return total
End If
End If
Next
Return Nothing
End Function
Shared Function ExtractTotalAlternative(fullText As String) As Decimal?
' Fallback extraction method
Dim pattern = "(?:Total|TOTAL|Grand Total|Amount Due).*?(\d+\.\d{2})"
Dim match = System.Text.RegularExpressions.Regex.Match(fullText, pattern)
Dim total As Decimal
If match.Success AndAlso Decimal.TryParse(match.Groups(1).Value, total) Then
Return total
End If
Return Nothing
End Function
End ClassInterfejsy API do skanowania paragonów, takie jak IronOCR, oferują niezawodne rozwiązania do automatycznego pozyskiwania danych z paragonów. Dzięki zaawansowanej technologii OCR firmy mogą automatycznie wyodrębniać nazwy dostawców, daty zakupów, szczegółowe listy produktów, ceny, podatki i sumy. Dzięki obsłudze wielu języków, walut i BARCODE firmy mogą uprościć zarządzanie paragonami, zaoszczędzić czas i podejmować decyzje oparte na danych.
IronOCR zapewnia programistom narzędzia niezbędne do dokładnego i wydajnego pozyskiwania tekstu, umożliwiając automatyzację zadań i zwiększenie wydajności. Pełen zestaw funkcji biblioteki obejmuje obsługę różnych typów dokumentów oraz najnowsze ulepszenia, takie jak 98% redukcja zużycia pamięci.
Spełniając wymagania wstępne i integrując IronOCR, można odkryć zalety automatycznego przetwarzania paragonów. Dokumentacja biblioteki, przykłady i przewodniki dotyczące rozwiązywania problemów zapewniają płynne wdrożenie.
Aby uzyskać więcej informacji, odwiedź stronę dotyczącą licencji lub zapoznaj się z samouczkiem dotyczącym OCR Tesseract w języku C#.
IronOCR jest częścią IRONSUITE
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