如何获得阅读自信
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读取 OCR 的信心(光学字符识别)指的是OCR系统对其识别图像或文档中文本的准确性所赋予的确定性或可靠性等级。 这是衡量OCR系统对识别文本是否正确的置信度的一种方式。
高置信度得分表示识别的准确性非常可靠，而低置信度得分则表明识别可能较不可靠。
开始使用IronOCR
立即在您的项目中开始使用IronOCR，并享受免费试用。
如何获得阅读自信
获取阅读信心示例
在对输入图像执行OCR之后，文本的置信度将存储在Confidence属性中。 使用 'using' 语句来自动处理对象的释放。 使用 OcrImageInput 和 OcrPdfInput 类分别添加图片和PDF文档。 Read 方法将返回一个 OcrResult 对象，该对象允许访问 Confidence 属性。
:path=/static-assets/ocr/content-code-examples/how-to/tesseract-result-confidence-get-confidence.csusing IronOcr;
// Instantiate IronTesseract
IronTesseract ocrTesseract = new IronTesseract();
// Add image
using var imageInput = new OcrImageInput("sample.tiff");
// Perform OCR
OcrResult ocrResult = ocrTesseract.Read(imageInput);
// Get confidence level
double confidence = ocrResult.Confidence;Imports IronOcr
' Instantiate IronTesseract
Private ocrTesseract As New IronTesseract()
' Add image
Private imageInput = New OcrImageInput("sample.tiff")
' Perform OCR
Private ocrResult As OcrResult = ocrTesseract.Read(imageInput)
' Get confidence level
Private confidence As Double = ocrResult.ConfidenceVB C#
获取不同级别的读取置信度
不仅可以检索整个文档的置信度，还可以访问每个页面、段落、行、单词和字符的置信度。 此外，您可以获取块的置信度，该块代表一个或多个紧密排列的段落的集合。
:path=/static-assets/ocr/content-code-examples/how-to/tesseract-result-confidence-confidence-level.cs// Get page confidence level
double pageConfidence = ocrResult.Pages[0].Confidence;
// Get paragraph confidence level
double paragraphConfidence = ocrResult.Paragraphs[0].Confidence;
// Get line confidence level
double lineConfidence = ocrResult.Lines[0].Confidence;
// Get word confidence level
double wordConfidence = ocrResult.Words[0].Confidence;
// Get character confidence level
double characterConfidence = ocrResult.Characters[0].Confidence;
// Get block confidence level
double blockConfidence = ocrResult.Blocks[0].Confidence;' Get page confidence level
Dim pageConfidence As Double = ocrResult.Pages(0).Confidence
' Get paragraph confidence level
Dim paragraphConfidence As Double = ocrResult.Paragraphs(0).Confidence
' Get line confidence level
Dim lineConfidence As Double = ocrResult.Lines(0).Confidence
' Get word confidence level
Dim wordConfidence As Double = ocrResult.Words(0).Confidence
' Get character confidence level
Dim characterConfidence As Double = ocrResult.Characters(0).Confidence
' Get block confidence level
Dim blockConfidence As Double = ocrResult.Blocks(0).ConfidenceVB C#
获取字符选项
除了置信度之外，还有另一个有趣的属性称为选项。 选择包含了一系列备选词及其统计相关性的列表。 此信息允许用户访问其他可能的字符。
:path=/static-assets/ocr/content-code-examples/how-to/tesseract-result-confidence-get-choices.csusing IronOcr;
using static IronOcr.OcrResult;
// Instantiate IronTesseract
IronTesseract ocrTesseract = new IronTesseract();
// Add image
using var imageInput = new OcrImageInput("Potter.tiff");
// Perform OCR
OcrResult ocrResult = ocrTesseract.Read(imageInput);
// Get choices
Choice[] choices = ocrResult.Characters[0].Choices;Imports IronOcr
Imports IronOcr.OcrResult
' Instantiate IronTesseract
Private ocrTesseract As New IronTesseract()
' Add image
Private imageInput = New OcrImageInput("Potter.tiff")
' Perform OCR
Private ocrResult As OcrResult = ocrTesseract.Read(imageInput)
' Get choices
Private choices() As Choice = ocrResult.Characters(0).ChoicesVB C#
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