BarCodeReader

BarCodeReader

BarCodeReader encapsulates an image which may contain one or several barcodes, it then can perform ReadBarCodes operation to detect barcodes.

Constructor

new BarCodeReader(image, rectangles, decodeTypes)

Initializes a new instance of the BarCodeReader
Parameters:
Name Type Description
image encoded as base64 string or path to image
rectangles array of object by type Rectangle
decodeTypes the array of objects by DecodeType
Source:
Example
//This sample shows how to detect Code39 and Code128 barcodes.
let reader = new BarCodeReader("test.png", null,  [DecodeType.CODE_39_STANDARD, DecodeType.CODE_128]);
reader.readBarCodes().forEach(function(result, i, results)
{
   console.log("BarCode Type: " + result.getCodeTypeName());
   console.log("BarCode CodeText: " + result.getCodeText());
});

Methods

containsAny()

Determines whether any of the given decode types is included into
Parameters:
Name Type Description
...decodeTypes Types to verify.
Returns:
Type Description
bool Value is a true if any types are included into.
Source:

exportToXml(xmlFile)

Exports BarCode properties to the xml-file specified
Parameters:
Name Type Description
xmlFile The name of the file
Returns:
Type Description
Whether or not export completed successfully.
Returns True in case of success; False Otherwise
Source:

getBarCodeDecodeType() → {*}

Gets the decode type of the input barcode decoding
Returns:
Type Description
*
Source:

getBarcodeSettings()

The main BarCode decoding parameters. Contains parameters which make influence on recognized data.
Returns:
Type Description
The main BarCode decoding parameters
Source:

getFoundBarCodes()

Gets recognized BarCodeResult array
Returns:
Type Description
recognized BarCodeResult array
Source:
Example
//This sample shows how to read barcodes with BarCodeReader
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
reader.readBarCodes();
for(let i = 0; reader.getFoundCount() > i; ++i)
   console.log("BarCode CodeText: " +  reader.getFoundBarCodes()[i].getCodeText());

getFoundCount()

Gets recognized barcodes count
Source:
Example
//This sample shows how to read barcodes with BarCodeReader
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
reader.readBarCodes();
for(let i = 0; reader.getFoundCount() > i; ++i)
   console.log("BarCode CodeText: " + reader.getFoundBarCodes()[i].getCodeText());
Value: The recognized barcodes count

getQualitySettings()

QualitySettings allows to configure recognition quality and speed manually.
You can quickly set up QualitySettings by embedded presets: HighPerformance, NormalQuality,
HighQuality, MaxBarCodes or you can manually configure separate options.
Default value of QualitySettings is NormalQuality.
Returns:
Type Description
QualitySettings to configure recognition quality and speed.
Source:
Examples
//This sample shows how to use QualitySettings with BarCodeReader

let reader = new BarCodeReader("test.png", null, null);
 //set high performance mode
reader.setQualitySettings(QualitySettings.getHighPerformance());
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
//normal quality mode is set by default
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
//set high performance mode
reader.setQualitySettings(QualitySettings.getHighPerformance());
//set separate options
reader.getQualitySettings().setAllowMedianSmoothing(true);
reader.getQualitySettings().setMedianSmoothingWindowSize(5);
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});

getTimeout()

Gets the timeout of recognition process in milliseconds.
Returns:
Type Description
The timeout.
Source:
Example
let reader = new BarCodeReader("test.png", null, null);
reader.setTimeout(5000);
reader.readBarCodes().forEach(function(result, i, results)
{
   console.log("BarCode CodeText: " + result.getCodeText());
});

readBarCodes()

Reads BarCodeResult from the image.
Returns:
Type Description
Returns array of recognized {@code BarCodeResult}s on the image. If nothing is recognized, zero array is returned.
Source:
Example
//This sample shows how to read barcodes with BarCodeReader
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
reader.readBarCodes().forEach(function(result, i, results)
{
   console.log("BarCode CodeText: " + result.getCodeText());
});
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
reader.readBarCodes();
for(let i = 0; reader.getFoundCount() > i; ++i)
   console.log("BarCode CodeText: " + reader.getFoundBarCodes()[i].getCodeText());

setBarCodeImage(imageResource, …areas)

Sets bitmap image and areas for recognition.
Must be called before ReadBarCodes() method.
Parameters:
Name Type Attributes Description
imageResource The image for recognition.
areas <repeatable>
areas list for recognition
Source:
Throws:
BarcodeException
Example
//This sample shows how to detect Code39 and Code128 barcodes.
let bmp = "test.png";
let reader = new BarCodeReader();
reader.setBarCodeReadType([ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
var img = new Image();
img.src = 'path_to_image';
width = img.width;
height = img.height;
reader.setBarCodeImage(bmp, new Rectangle[] { new Rectangle(0, 0, width, height) });
reader.readBarCodes().forEach(function(result, i, results)
{
   console.log("BarCode Type: " + result.getCodeTypeName());
   console.log("BarCode CodeText: " + result.getCodeText());
});

setBarCodeReadType(…types)

Sets SingleDecodeType type array for recognition.
Must be called before readBarCodes() method.
Parameters:
Name Type Attributes Description
types <repeatable>
The SingleDecodeType type array to read.
Source:
Example
//This sample shows how to detect Code39 and Code128 barcodes.
let reader = new BarCodeReader();
reader.setBarCodeReadType([ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
reader.setBarCodeImage("test.png");
reader.readBarCodes().forEach(function(result, i, results)
{
    console.log("BarCode Type: " + result.getCodeTypeName());
    console.log("BarCode CodeText: " + result.getCodeText());
});

setQualitySettings()

QualitySettings allows to configure recognition quality and speed manually.
You can quickly set up QualitySettings by embedded presets: HighPerformance, NormalQuality,
HighQuality, MaxBarCodes or you can manually configure separate options.
Default value of QualitySettings is NormalQuality.
Source:
Examples
//This sample shows how to use QualitySettings with BarCodeReader
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
//set high performance mode
reader.setQualitySettings(QualitySettings.getHighPerformance());
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
//normal quality mode is set by default
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});
let reader = new BarCodeReader("test.png", null,  [ DecodeType.CODE_39_STANDARD, DecodeType.CODE_128 ]);
 //set high performance mode
reader.setQualitySettings(QualitySettings.getHighPerformance());
//set separate options
reader.getQualitySettings().setAllowMedianSmoothing(true);
reader.getQualitySettings().setMedianSmoothingWindowSize(5);
reader.readBarCodes().forEach(function(result, i, results)
{
  console.log("BarCode CodeText: " + result.getCodeText());
});
QualitySettings to configure recognition quality and speed.

setTimeout(value)

Sets the timeout of recognition process in milliseconds.
Parameters:
Name Type Description
value The timeout.
Source:
Example
let reader = new BarCodeReader("test.png", null, null);
reader.setTimeout(5000);
reader.readBarCodes().forEach(function(result, i, results)
{
   console.log("BarCode CodeText: " + result.getCodeText());
});

(static) convertToString()

internal
Source:

(static) importFromXml(xmlFile)

Exports BarCode properties to the xml-file specified
Parameters:
Name Type Description
xmlFile The name of the file
Returns:
Type Description
Whether or not export completed successfully. Returns True in case of success; False Otherwise
Source: