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PODifference between direct putting 2D array values in image and making a pixel from these values and then putting it
 

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  1. PODifference between direct putting 2D array values in image and making a pixel from these values and then putting it
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    <p>I am a beginner in digital image processing field. right now i am coding to get an image from 2D array... i have downloaded these two code samples... when i am using the first one i am getting correct image, but when i am using the second one i am getting processed image with more brightness as compared to the previous one.</p> <p>Please suggest me what is the difference between these codes and also which code should i refer... i have to use this code to get my research papers results... </p> <p>1). </p> <pre><code> public BufferedImage getImage(BufferedImage original, float paddedArray[][], int width, int height) { BufferedImage img = new BufferedImage(width, height, original.getType()); for (int i = 0; i &lt; width; i++) { for (int j = 0; j &lt; height; j++) { int c = Math.round(paddedArray[i][j]); int pixel = c &lt;&lt; 16 | c &lt;&lt; 8 | c; img.setRGB(i, j, pixel); } } return img; } </code></pre> <hr> <p>2). </p> <pre><code>public BufferedImage getImages(BufferedImage original, float paddedArray[][], int width, int height) { BufferedImage img = new BufferedImage(width, height, original.getType()); Graphics2D g = (Graphics2D) img.getGraphics(); for (int i = 0; i &lt; width; i++) { for (int j = 0; j &lt; height; j++) { int c = Math.round(paddedArray[i][j]); if (c &gt;= greyRange) { c = greyRange - 1; } g.setColor(new Color(c, c, c)); g.fillRect(i, j, 1, 1); } } return img; } </code></pre> <p>these codes i am using i only want to know the difference between <code>g.setColor(new Color(c, c, c));</code> and <code>img.setRGB(i, j, pixel);</code></p>
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    1. USMayank Tiwari
    1. USMayank Tiwari
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      1. PODifference between direct putting 2D array values in image and making a pixel from these values and then putting it
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      1. VTUpMod
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      1. VTApproveEditSuggestion
    1. COUsing floats as color definition and treating them like integers... ? That's interesting... Are you sure that's what you want to do?
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      1. USDariusz
    2. COIn first case why do you test and set `c` (`c >= greyRange`) when you will never use it again?? Btw ***use a profiler***
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      1. PODifference between direct putting 2D array values in image and making a pixel from these values and then putting it
      1. USUmNyobe
    3. COi am using algorithm of local contrast enhancement hence i am using float array. and for case 1. if condition is useless.. i have removed it....
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      1. PODifference between direct putting 2D array values in image and making a pixel from these values and then putting it
      1. USMayank Tiwari
 

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