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PODoes Neuroph Image Recognition Plugin correctly convert RGB images to Black/White?
 

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  1. PODoes Neuroph Image Recognition Plugin correctly convert RGB images to Black/White?
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    <p>I have a question regarding the <code>FractionRgbData</code> class of Neuroph ImageRecognition of Neuroph 2.6. I do not fully understand the implementation of the static <code>FractionRgbData.convertRgbInputToBinaryBlackAndWhite(double[] inputRGB)</code> method (see a copy of the method below). More specifically, I do not understand why the length of the input array is divided by 3 in the for-loop condition and the for-loop variable <code>i</code> is also incremented with 3 every iteration? I would think dividing the input array by 3 should be enough.</p> <p>Note that this method is used in the <a href="http://neuroph.svn.sourceforge.net/viewvc/neuroph/tags/neuroph-2.6/src/org/neuroph/contrib/imgrec/ImageRecognitionHelper.java?revision=1271&amp;view=markup" rel="nofollow"><code>ImageRecognitionHelper</code></a> class and this class shows that the <code>inputRGB</code> double comes from the <code>FractionRgbData.getFlattenedRgbValues()</code> which can be seen <a href="http://neuroph.svn.sourceforge.net/viewvc/neuroph/tags/neuroph-2.6/src/org/neuroph/contrib/imgrec/FractionRgbData.java?revision=1271&amp;view=markup" rel="nofollow">here</a>. As far as I could understand the <code>inputRGB</code> double array contains the red, green and blue channel of the image one after another.</p> <p>Hopefully someone can shed some light on this implementation!</p> <p>Thanks in advance,</p> <p>Barry NL</p> <pre><code>/** * Converts image rgb data to binary black and white data * @param inputRGB flatten rgb data * @return binary black and white representation of image */ public static double[] convertRgbInputToBinaryBlackAndWhite(double[] inputRGB) { double inputBinary[]= new double[inputRGB.length/3]; for(int i=0; i&lt;inputRGB.length/3; i+=3) { if (inputRGB&gt;0) inputBinary = 0; else inputBinary = 1; } return inputBinary; } </code></pre>
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