Recognition Color Schemes Modes

Read Barcodes Online: You can check the quality of Aspose.BarCode recognition and view the results online.

Overview

Aspose.BarCode for .NET allows reading barcodes with non-typical color schemes, like barcodes with inverted colors (luminance) and color barcodes on color images. To do this, two properties InverseImage and ComplexBackground are added to QualitySettings. Additional recognition modes for non-typical color schemes can reduce recognition performance and increase recognition time.

If you need any clarifications, feel free to reach out to Aspose Technical Support: ask your questions at Aspose.Barcode Forum or contact Aspose Paid Support Helpdesk.

Inverse Image Mode

Aspose.BarCode for .NET enables reading barcode images with inverted colors. To do this, it is required to use a special property called InverseImage, as listed in the table below.

Inverse Image Mode	Description
Auto	At this time the same as Disabled. Disables additional recognition for barcodes with inverted colors (luminance). In the future, barcode types like QR can use this mode
Disabled	Disables additional recognition for barcodes with inverted colors (luminance)
Enabled	Enables additional recognition for barcodes with inverted colors (luminance)

The following table shows difference in recognition quality, depends on option value.

Inverse Image Disabled	Inverse Image Enabled
Recognized barcodes: 1	Recognized barcodes: 2

Console.WriteLine("ReadInverseImage:");
//recognize image with Inverse image mode Disabled
Console.WriteLine("InverseImageMode: Disabled");
using (BarCodeReader read = new BarCodeReader($"{path}aztec_regular_inverse.png", DecodeType.Aztec))
{
    read.QualitySettings.InverseImage = InverseImageMode.Disabled;
    Console.WriteLine($"Barcodes read: {read.ReadBarCodes().Length}");
    foreach (BarCodeResult result in read.FoundBarCodes)
        Console.WriteLine($"{result.CodeTypeName}:{result.CodeText}");
}

//recognize image with Inverse image mode Enabled
Console.WriteLine("InverseImageMode: Enabled");
using (BarCodeReader read = new BarCodeReader($"{path}aztec_regular_inverse.png", DecodeType.Aztec))
{
    read.QualitySettings.InverseImage = InverseImageMode.Enabled;
    Console.WriteLine($"Barcodes read: {read.ReadBarCodes().Length}");
    foreach (BarCodeResult result in read.FoundBarCodes)
        Console.WriteLine($"{result.CodeTypeName}:{result.CodeText}");
}

View the results of code execution

ReadInverseImage:
InverseImageMode: Disabled
Barcodes read: 1
Aztec:Aspose Regular
InverseImageMode: Enabled
Barcodes read: 2
Aztec:Aspose Regular
Aztec:Aspose Inverse

Complex Background Mode

Aspose.BarCode for .NET enables reading colored barcodes on a colored background. With property ComplexBackground the barcode recognition engine attempts to distinguish the colored background from barcode labels through color quantization and then subtract it. Mode list is shown in the table below.

Complex Background Mode	Description
Auto	At this time the same as Disabled. Disables additional recognition of color barcodes on color images
Disabled	Disables additional recognition of color barcodes on color images
Enabled	Enables additional recognition of color barcodes on color images

The following table shows difference in recognition quality, depends on option value.

Complex Background Disabled	Complex Background Enabled
Recognized barcodes: 0	Recognized barcodes: 1

Console.WriteLine("ReadComplexBackground:");
//recognize image with Complex background mode Disabled
Console.WriteLine("ComplexBackgroundMode: Disabled");
using (BarCodeReader read = new BarCodeReader($"{path}qr_color.png", DecodeType.QR))
{
    read.QualitySettings.ComplexBackground = ComplexBackgroundMode.Disabled;
    Console.WriteLine($"Barcodes read: {read.ReadBarCodes().Length}");
    foreach (BarCodeResult result in read.FoundBarCodes)
        Console.WriteLine($"{result.CodeTypeName}:{result.CodeText}");
}

//recognize image with Complex background mode Enabled
Console.WriteLine("ComplexBackgroundMode: Enabled");
using (BarCodeReader read = new BarCodeReader($"{path}qr_color.png", DecodeType.QR))
{
    read.QualitySettings.ComplexBackground = ComplexBackgroundMode.Enabled;
    Console.WriteLine($"Barcodes read: {read.ReadBarCodes().Length}");
    foreach (BarCodeResult result in read.FoundBarCodes)
        Console.WriteLine($"{result.CodeTypeName}:{result.CodeText}");
}

View the results of code execution

ReadComplexBackground:
ComplexBackgroundMode: Disabled
Barcodes read: 0
ComplexBackgroundMode: Enabled
Barcodes read: 1
QR:Aspose常に先を行く

Recognition Barcode Quality and Deconvolution Modes