假陽性

Curtis Chau

更新:2025年6月1日

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如何消除誤報？

條碼讀取中的誤報可能發生在複雜的背景圖案與條碼相似，或者當噪音和偽影造成讀取器錯誤識別為有效條碼的意外標記時。以下步驟可用於消除 IronBarcode 讀取輸出中的誤報：

1.指定預期條碼格式：配置 IronBarcode 僅讀取您預期的條碼格式。完整的選項清單請參閱：條碼編碼。

2.啟用RemoveFalsePositive屬性：掃描條碼時，IronBarcode 會在影像中搜尋最有可能類似於條碼的"候選"區域，然後嘗試解碼這些區域。將此屬性設為true後，IronBarcode 將只解碼編碼中沒有錯誤的區域。 預設情況下， RemoveFalsePositive已設定為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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