Javacpp-presets: Converting BufferedImage to PIX image

[tahaemara]

I use javac with tesseract in my app, and I want to convert BufferedImage to PIX image to use it like the BasicExample.java,

PIX image = pixRead(args.length > 0 ? args[0] : "/usr/src/tesseract/testing/phototest.tif");
        api.SetImage(image);
        // Get OCR result
        outText = api.GetUTF8Text();

I tried this, but did not work.

Pix image=null; 
        try {
        image = LeptUtils.convertImageToPix(img);
        } catch (IOException ex) {
        Logger.getLogger(OCR.class.getName()).log(Level.SEVERE, null, ex);
        }
api.SetImage(image); 

I searched a lot, but can figure out anything.
Thanks in advance.

[saudet]

Duplicate of issue #224.

Until someone (you?) contributes a LeptonicaFrameConverter, you can find code for that here that converts to Mat:
https://github.com/deeplearning4j/DataVec/blob/master/datavec-data/datavec-data-image/src/main/java/org/datavec/image/loader/NativeImageLoader.java#L159
Which we can then convert to BufferedImage with OpenCVFrameConverter and Java2DFrameConverter:
http://bytedeco.org/news/2015/04/04/javacv-frame-converters/
Or less efficiently with Java2DFrameUtils:
http://bytedeco.org/javacv/apidocs/org/bytedeco/javacv/Java2DFrameUtils.html

[tahaemara]

Ok, Thank you.

[saudet]

BTW, if you end up creating the equivalent of a LeptonicaFrameConverter, please consider making a contribution. If you encounter any issues doing that, let me know and I will help. Thanks!

[saudet]

I've finally implemented LeptonicaFrameConverter so we can now do something like this to convert efficiently an BufferedImage into a PIX for Tesseract:

    Java2DFrameConverter converter = new Java2DFrameConverter();
    LeptonicaFrameConverter converter2 = new LeptonicaFrameConverter();

    PIX pix = converter2.convert(converter.convert(img));

Please give it a try with the snapshots (http://bytedeco.org/builds/) and let me know if you encounter any issues with it! Thanks

[thekevshow]

Java2DFrameConverter converter = new Java2DFrameConverter(); LeptonicaFrameConverter converter2 = new LeptonicaFrameConverter(); PIX pix = converter2.convert(converter.convert(img));

This doesn't work, have tried with test image. Seems to scramble the image.

[saudet]

@kev2316 See issue https://github.com/bytedeco/javacv/issues/1115.