/** A wrapper for {@link #setImage(int, int, ByteBuffer, Rectangle, int)}. */
private void setImage(RenderedImage image, Rectangle rect) throws IOException {
setImage(
image.getWidth(),
image.getHeight(),
ImageIOHelper.getImageByteBuffer(image),
rect,
image.getColorModel().getPixelSize());
}
/**
* Performs OCR operation.
*
* @param bi a buffered image
* @param rect the bounding rectangle defines the region of the image to be recognized. A
* rectangle of zero dimension or <code>null</code> indicates the whole image.
* @return the recognized text
* @throws TesseractException
*/
public String doOCR(BufferedImage bi, Rectangle rect) throws TesseractException {
try {
return doOCR(ImageIOHelper.getIIOImageList(bi), rect);
} catch (Exception e) {
logger.log(Level.SEVERE, e.getMessage(), e);
throw new TesseractException(e);
}
}
/**
* Gets cloned image files.
*
* @return the ClonedImageFiles
* @throws java.io.IOException
*/
public List<File> getClonedImageFiles() throws IOException {
if (oimages != null) {
if (dpiX == 0 || dpiY == 0) {
if (rect == null || rect.isEmpty()) {
return ImageIOHelper.createTiffFiles(oimages, index);
} else {
// rectangular region
// BufferedImage bi = ((BufferedImage)
// oimages.get(index).getRenderedImage()).getSubimage(rect.x, rect.y, rect.width,
// rect.height);
// On Linux, the standard getSubimage method has generated images that Tesseract does not
// like.
BufferedImage bi =
ImageHelper.getSubImage(
(BufferedImage) oimages.get(index).getRenderedImage(),
rect.x,
rect.y,
rect.width,
rect.height);
List<IIOImage> tempList = new ArrayList<IIOImage>();
tempList.add(new IIOImage(bi, null, null));
return ImageIOHelper.createTiffFiles(tempList, 0);
}
} else {
// scaling
if (rect == null || rect.isEmpty()) {
List<IIOImage> tempList = new ArrayList<IIOImage>();
for (IIOImage oimage : (index == -1 ? oimages : oimages.subList(index, index + 1))) {
BufferedImage bi = (BufferedImage) oimage.getRenderedImage();
Map<String, String> metadata = ImageIOHelper.readImageData(oimage);
float scale = dpiX / Float.parseFloat(metadata.get("dpiX"));
bi =
ImageHelper.getScaledInstance(
bi, (int) (bi.getWidth() * scale), (int) (bi.getHeight() * scale));
tempList.add(new IIOImage(bi, null, null));
}
return ImageIOHelper.createTiffFiles(tempList, (index == -1 ? index : 0), dpiX, dpiY);
} else {
// rectangular region
// Cut out the subimage first and rescale that
BufferedImage bi =
((BufferedImage) oimages.get(index).getRenderedImage())
.getSubimage(rect.x, rect.y, rect.width, rect.height);
Map<String, String> metadata = ImageIOHelper.readImageData(oimages.get(index));
float scale = dpiX / Float.parseFloat(metadata.get("dpiX"));
bi =
ImageHelper.getScaledInstance(
bi, (int) (bi.getWidth() * scale), (int) (bi.getHeight() * scale));
List<IIOImage> tempList = new ArrayList<IIOImage>();
tempList.add(new IIOImage(bi, null, null));
return ImageIOHelper.createTiffFiles(tempList, 0, dpiX, dpiY);
}
}
} else {
return ImageIOHelper.createTiffFiles(imageFile, index);
}
}