假阳性

Curtis Chau

已更新:2026年4月21日

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如何消除误报？

条形码读取中的误报可能发生在复杂的背景图案与条形码相似，或者噪声和伪影造成读取器错误识别为有效条形码的意外标记时。以下步骤可用于消除 IronBarcode 读取输出中的误报：

1.指定预期条形码格式：配置 IronBarcode 以仅读取您预期的条形码格式。完整的选项列表请参见：条形码编码。

启用 RemoveFalsePositive 属性：在扫描 BARCODE 时，IronBarcode 会在图像中搜索最可能类似 BARCODE 的"候选"区域，然后尝试解码这些区域。将此属性设置为 true 后，IronBarcode 仅会解码编码无误的区域。默认情况下，RemoveFalsePositive 已设置为 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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