LEADTOOLS v18多平台条码识别（代码示例）

LEADTOOLS v18（即LEADTOOLS Anywhere）将其世界领先的成像技术扩展到了WinRT、iOS、Android、Windows Phone和Linux等平台。不仅如此，用户还可以在所有流行平台中实现查看、注释和标记、OCR、条形码、PDF、图像格式、压缩和图像处理等功能。

LEADTOOLS在每个开发平台上面都提供了一组非常相似的开发库，这是LEADTOOLS的一个非常明显的优势，让开发者既能够开发原生的应用程序，又不用花费太多的时间进行完全的代码重写。

LEADTOOLS Anywhere功能

提供了专门针对.NET, HTML5, WinRT, Windows Phone, iOS, OS X和Android的图像查看器；

支持加载、转换和保存超过150种图像格式；

支持条形码读写，包括：QR码，PDF417，二维码，UPC/EAN等；

OCR将图像转换为可搜索的文本，PDF，DOC；

全面的注释和标记，包括几何形状，便条，编校，亮点和橡皮图章；

拥有超过200多种图像处理功能，如图像增强，图像纠偏等

接下来，我们就一起展示一下LEADTOOLS Anywhere如何在每个平台上面读取条形码。

.NET

System.Drawing.Bitmap bitmap = ... //

// Get a LEADTOOLS RasterImage from the platform image

RasterImage rasterImage = RasterImageConverter.FromImage(bitmap);

// Create a LEADTOOLS Barcode Engine instance

private BarcodeEngine barcodeEngine = new BarcodeEngine();

// Read the first barcode found in the image

BarcodeData barcodeData = barcodeEngine.Reader.ReadBarcode(rasterImage,

LogicalRectangle.Empty, BarcodeSymbology.Unknown);

// For this example, simply output the barcode type, location and data in the console

if (barcodeData != null) {

Console.WriteLine("Symbology:{0}", barcodeData.Symbology);

Console.WriteLine("Location:{0},{1},{2},{3}", barcodeData.Bounds.X,

barcodeData.Bounds.Y, barcodeData.Bounds.Width, barcodeData.Bounds.Height);

Console.WriteLine("Value:{0}", barcodeData.Value);

} else {

Console.WriteLine("No barcodes found");

}

WinRT & Windows Phone

Windows.UI.Xaml.Media.ImageSource imageSource = ... //

// Get a LEADTOOLS RasterImage from the platform image

RasterImage rasterImage = RasterImageConverter.ConvertFromImageSource(

imageSource, ConvertFromImageOptions.None);

// Create a LEADTOOLS Barcode Engine instance

private BarcodeEngine barcodeEngine = new BarcodeEngine();

// Read the first barcode found in the image

BarcodeData barcodeData = barcodeEngine.Reader.ReadBarcode(rasterImage,

LogicalRectangle.Empty, BarcodeSymbology.Unknown);

// For this example, simply output the barcode type, location and data in the console

if (barcodeData != null) {

Console.WriteLine("Symbology:{0}", barcodeData.Symbology);

Console.WriteLine("Location:{0},{1},{2},{3}", barcodeData.Bounds.X,

barcodeData.Bounds.Y, barcodeData.Bounds.Width, barcodeData.Bounds.Height);

Console.WriteLine("Value:{0}", barcodeData.Value);

} else {

Console.WriteLine("No barcodes found");

}



iOS & OS X

UIImage* uiImage = ... //

// Get a LEADTOOLS RasterImage from the platform image

LTRasterImage* rasterImage = [LTRasterImageConverter convertFromImage:uiImage

options:LTConvertFromImageOptions_None error:nil];

// Create a LEADTOOLS Barcode Engine instance

LTBarcodeEngine* barcodeEngine = [LTBarcodeEngine new];

// Read the first barcode found in the image

LTBarcodeData* barcodeData = [barcodeEngine.reader readBarcode:rasterImage

searchBounds:LeadRect_Empty() symbologies:nil symbologiesCount:0 error:nil];

// For this example, simply retrieve the barcode type, location and data

if(barcodeData != nil) {

NSLog(@"Symbology:%u", barcodeData.symbology);

NSLog(@"Location:%u,%u,%u,%u", barcodeData.bounds.x, barcodeData.bounds.y,

barcodeData.bounds.width, barcodeData.bounds.height);

NSLog(@"Value:%@", barcodeData.value);

} else {

NSLog(@"No barcodes found");

}



Android

android.graphics.Bitmap bitmap = ... //

// Get a LEADTOOLS RasterImage from the platform image

RasterImage rasterImage = RasterImageConverter.convertFromBitmap(

bitmap, ConvertFromImageOptions.NONE);

// Create a LEADTOOLS Barcode Engine instance

private BarcodeEngine barcodeEngine = new BarcodeEngine();

// Read the first barcode found in the image

BarcodeData barcodeData = barcodeEngine.getReader().readBarcode(

rasterImage, LeadRect.getEmpty(), BarcodeSymbology.UNKNOWN);

// For this example, simply output the barcode type, location and data in the console

if (barcodeData != null) {

Log.i("LEADTOOLS.BarcodeDemo", String.format("Symbology:%s", barcodeData.getSymbology()));

Log.i("LEADTOOLS.BarcodeDemo", String.format("Location:%1$s,%2$s,%3$s,%4$s",

barcodeData.getBounds().getX(), barcodeData.getBounds().getY(),

barcodeData.getBounds().getWidth(), barcodeData.getBounds().getHeight()));

Log.i("LEADTOOLS.BarcodeDemo", String.format("Value:%s", barcodeData.getValue()));

} else {

Log.i("LEADTOOLS.BarcodeDemo", "No barcodes found");

}