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POOCR scan of letters. Failed in loading training letters
 

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  1. POOCR scan of letters. Failed in loading training letters
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    <p>Using the javaocr framework from sourceforge. Trying to scan letters from a image, and training the system to recognize them.</p> <p>Getting this exception when loading trainer:</p> <pre><code>java.io.IOException: Expected to decode 26 characters but actually decoded 33 characters in training: /Developer/MAckan/bin/LETTERS/trainLetters.PNG at net.sourceforge.javaocr.ocrPlugins.mseOCR.TrainingImageLoader.load(TrainingImageLoader.java:111) </code></pre> <p>My code is like this:</p> <pre><code>loader.load(this,ClassLoader.getSystemResource("LETTERS/trainLetters.PNG").getPath(), new CharacterRange('A', 'Z'), images); </code></pre> <p>Another question is how to get it to train Scandinavian letters. If I enter a range A-Ö it expects 150 characters.</p> <p>Then when I scan I try and scan a line in the image at the time:</p> <pre><code>scanner.addTrainingImages(images); final CharacterRange[] cr = new CharacterRange[1]; cr[0] = new CharacterRange('A', 'Z'); // get the first line of letters final int x1 = 0; final int y1 = 130; final int x2 = 640; final int y2 = 170; for (int i = 0; i &lt; 15; i++) { final String text = scanner.scan(boardImage, x1, y1 + (i * 40), x2, y2 + (i * 40), cr); System.out.println("scanned " + text); } </code></pre> <p>And I actually get output, but not the output I expect... Anyone have experience with the javaocr framework? </p> <p>Update: Solved the training issue. The training image was missing a couple of charachters and Scandinavian is not supported (?). Still getting strange output.</p> <p>Update2: Solved the entire issue with writing my own comparison instead. I did some manipulation of the images (reduced colors and transperency) and compared pixel by pixel and returned a diff against alafabet images. The lowest diff "wins". Works for this particular case, but I am still interested in getting OCR running.</p> <p>Thanks.</p> <p>/A</p>
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    1. USAndreas Blomqvist
    1. USAndreas Blomqvist
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    1. COThe error message _"Expected to decode 26 characters but actually decoded 33 characters in training"_ seems pretty self-explanatory to me. Your input contains letters outside the ASCII range `a-z`, no?
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      1. POOCR scan of letters. Failed in loading training letters
      1. USBart Kiers
    2. COI managed to get the training images to load, didn't have any characters outside the range, but had missed one. Still giving strange output from scan. Expecting something like "NOT" for the first line but getting: "PIQIZ". Do I need better training letters? Now I am using characters A-Z made on white background in Gimp with Geneva 31 as font.
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      1. POOCR scan of letters. Failed in loading training letters
      1. USAndreas Blomqvist
    3. COOkay, but now your question has changed, right? Since you now don't use letters outside `A-Z`, you don't get any exception, correct?
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      1. POOCR scan of letters. Failed in loading training letters
      1. USBart Kiers
 

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