zbar android本地图片,ZBar Android扫描本地QR或条形码图像
5 个答案:
答案 0 :(得分：4)
试试这个：
Bitmap barcodeBmp = BitmapFactory.decodeResource(getResources(),
R.drawable.barcode);
int width = barcodeBmp.getWidth();
int height = barcodeBmp.getHeight();
int pixels = new int;
barcodeBmp.getPixels(pixels, 0, width, 0, 0, width, height);
Image barcode = new Image(width, height, "RGB4");
barcode.setData(pixels);
int result = scanner.scanImage(barcode.convert("Y800"));
答案 1 :(得分：1)
我不清楚知道Android，但在iOS上执行：
//Action when user tap on button to call ZBarReaderController
- (IBAction)brownQRImageFromAlbum:(id)sender {
ZBarReaderController *reader = [ZBarReaderController new];
reader.readerDelegate = self;
reader.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; // Set ZbarReaderController point to the local album
ZBarImageScanner *scanner = reader.scanner;
[scanner setSymbology: ZBAR_QRCODE
config: ZBAR_CFG_ENABLE
to: 1];
[self presentModalViewController: reader animated: YES];
}
- (void) imagePickerController: (UIImagePickerController *) picker
didFinishPickingMediaWithInfo: (NSDictionary *) info {
UIImage *imageCurrent = (UIImage*)[info objectForKey:UIImagePickerControllerOriginalImage];
self.imageViewQR.image = imageCurrent;
imageCurrent = nil;
// ADD: get the decode results
id results =
[info objectForKey: ZBarReaderControllerResults];
ZBarSymbol *symbol = nil;
for (symbol in results)
break;
NSLog(@"Content: %@", symbol.data);
[picker dismissModalViewControllerAnimated: NO];
}
答案 2 :(得分：1)
Zbar扫描仪的Java端口仅接受Y800和GRAY像素格式(https://github.com/ZBar/ZBar/blob/master/java/net/sourceforge/zbar/ImageScanner.java)，这对于从相机预览中捕获的原始字节是可以的。但是来自Androis画廊的图像通常是JPEG压缩的，它们的像素不在Y800中，因此您可以通过将图像的像素转换为Y800格式来使扫描仪工作。有关示例代码，请参阅this官方支持论坛的主题。要计算像素数组长度，只需使用imageWidth * imageHeight公式。
@shujatAli您的示例图像调色板的格式是灰度，将其转换为RGB使您的代码片段适合我。您可以使用某些图像处理程序更改托盘的格式。我用过GIMP。
答案 3 :(得分：0)
private ImageScanner mScanner = new ImageScanner();
/**
* using zbar scan the bitmap
*/
private void scanQRImageZbar(Bitmap barcodeBmp) {
int width = barcodeBmp.getWidth();
int height = barcodeBmp.getHeight();
int[] pixels = new int[width * height];
barcodeBmp.getPixels(pixels, 0, width, 0, 0, width, height);
Image barcode = new Image(width, height, "RGB4");
barcode.setData(pixels);
int result = mScanner.scanImage(barcode.convert("Y800"));
if (result != 0) {
// save result in @var symSet
SymbolSet symSet = mScanner.getResults();
final Result rawResult = new Result();
for (Symbol sym : symSet) {
// symData will have the resultant code value
String symData;
if (Build.VERSION.SDK_INT >= 19) {
symData = new String(sym.getDataBytes(), StandardCharsets.UTF_8);
} else {
symData = sym.getData();
}
// save it in rawResult
if (!TextUtils.isEmpty(symData)) {
rawResult.setContents(symData);
rawResult.setBarcodeFormat(BarcodeFormat.getFormatById(sym.getType()));
break;
}
}
// toast message of content
new AlertDialog.Builder(FullScannerActivity.this).setMessage(rawResult.getContents()).show();
Log.e("onPreviewFrame: ", rawResult.getContents());
}
}
答案 4 :(得分：-2)
#include
#include
#include
using namespace std;
using namespace zbar;
int main (int argc, char **argv)
{
if(argc < 2)
return(1);
// Create a reader
ImageScanner scanner;
// Configure the reader
scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1);
// Obtain image data
Magick::Image magick(argv[1]); // Read an image file
int width = magick.columns(); // Extract dimensions
int height = magick.rows();
Magick::Blob blob; // Extract the raw data
magick.modifyImage();
magick.write(&blob, "GRAY", 8);
const void *raw = blob.data();
// Wrap image data
Image image(width, height, "Y800", raw, width * height);
// Scan the image for barcodes
int n = scanner.scan(image);
// Extract results
for (Image::SymbolIterator symbol = image.symbol_begin();
symbol != image.symbol_end();
++symbol) {
// Do something useful with results
cout << "decoded " << symbol->get_type_name()
<< " symbol \"" << symbol->get_data() << '"' << endl;
}
// Clean up
image.set_data(NULL, 0);
return(0);
}
按照上面的代码进行更改，使其与您的语言编程相关。