/**
* Performs OCR operation.
*
* @param imageList a list of <code>IIOImage</code> objects
* @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(List<IIOImage> imageList, Rectangle rect) throws TesseractException {
init();
setTessVariables();
try {
StringBuilder sb = new StringBuilder();
for (IIOImage oimage : imageList) {
pageNum++;
try {
setImage(oimage.getRenderedImage(), rect);
sb.append(getOCRText());
} catch (IOException ioe) {
// skip the problematic image
logger.log(Level.SEVERE, ioe.getMessage(), ioe);
}
}
if (hocr) {
sb.insert(0, htmlBeginTag).append(htmlEndTag);
}
return sb.toString();
} finally {
dispose();
}
}
private byte[] getBytes(short[] array) {
try {
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
DataOutputStream datastream = new DataOutputStream(bytestream);
for (short n : array) {
datastream.writeShort(n);
}
datastream.flush();
return bytestream.toByteArray();
} catch (IOException ioe) {
Logging.logger().finest(ioe.getMessage());
}
return null;
}