False Positives

Curtis Chau

更新日期:6月 1, 2025

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如何移除假陽性？

條碼閱讀中的假陽性可能發生在複雜的背景圖案類似於條碼或噪聲和瑕疵創建了非預期的標記，被讀取器誤認為是有效的條碼。可以採取以下步驟來移除IronBarcode的閱讀輸出中的假陽性：

指定預期的條碼格式：配置IronBarcode以僅閱讀您預期的條碼格式。完整的選項列表可在此查看：BarcodeEncoding。
啟用RemoveFalsePositive屬性：當掃描條碼時，IronBarcode會在圖像中搜索最可能類似條碼的“候選”區域，然後嘗試解碼這些區域。通過將此屬性設置為true，IronBarcode將僅解碼在其編碼中沒有錯誤的區域。在默認情況下，RemoveFalsePositive已設置為true。

using IronBarCode;

class BarcodeExample
{
    static void Main()
    {
        // Create a BarcodeReaderOptions object with specific parameters.
        BarcodeReaderOptions myOptionsExample = new BarcodeReaderOptions()
        {
            // Expect and return barcode results for only the Code 39 type.
            ExpectBarcodeTypes = IronBarCode.BarcodeEncoding.Code39,

            // Enable removal of false positives by setting to true.
            RemoveFalsePositive = true
        };

        // Read the barcode from the specified image file using the given options.
        var results = BarcodeReader.Read("barcode.png", myOptionsExample);

        // Process the results here, e.g., display them, log them, etc.
    }
}

using IronBarCode;

class BarcodeExample
{
    static void Main()
    {
        // Create a BarcodeReaderOptions object with specific parameters.
        BarcodeReaderOptions myOptionsExample = new BarcodeReaderOptions()
        {
            // Expect and return barcode results for only the Code 39 type.
            ExpectBarcodeTypes = IronBarCode.BarcodeEncoding.Code39,

            // Enable removal of false positives by setting to true.
            RemoveFalsePositive = true
        };

        // Read the barcode from the specified image file using the given options.
        var results = BarcodeReader.Read("barcode.png", myOptionsExample);

        // Process the results here, e.g., display them, log them, etc.
    }
}

Imports IronBarCode

Friend Class BarcodeExample
	Shared Sub Main()
		' Create a BarcodeReaderOptions object with specific parameters.
		Dim myOptionsExample As New BarcodeReaderOptions() With {
			.ExpectBarcodeTypes = IronBarCode.BarcodeEncoding.Code39,
			.RemoveFalsePositive = True
		}

		' Read the barcode from the specified image file using the given options.
		Dim results = BarcodeReader.Read("barcode.png", myOptionsExample)

		' Process the results here, e.g., display them, log them, etc.
	End Sub
End Class

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