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POJava ImagIO.write() changes quality during save
 

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    <p>I am writing an image library for fun and i came across a problem that i can't seem to solve. The class is pretty simple: take a picture, process it, display it through JFrame, and finally save it as a BufferedImage (javax.imageio.ImageIO). Here is what my picture looks like through the JFrame (this is my ColorEnhance class... on the Drustan nebula):</p> <p><img src="https://i.stack.imgur.com/F0SCW.gif" alt="The image as seen from the JFrame"></p> <p>Here is what the saved version (a png, but all types ImageIO.write() supports look the same):</p> <p><img src="https://i.stack.imgur.com/jvcWL.gif" alt="The image as seen after it has been saved"></p> <p>I'm not sure where the change occurs, but when I run this through my blur method entire lines appear from nothing in the png... Anyways, here is some code:</p> <pre><code>public void writeToFile(BufferedImage finalPic, String nameToAppend) { String temp=fileName.replace(".", nameToAppend+"."); String ext=fileName.substring(fileName.indexOf(".")+1); File file=new File(temp); try { ImageIO.write(finalPic, ext.toUpperCase(), file); System.out.println("Successfully saved to: "+temp); } catch (Exception e) { e.getMessage(); } } public void displayImage(String titleName) { ImageIcon icon = new ImageIcon(newPic); JFrame frame = new JFrame(titleName); JLabel label = new JLabel(icon); label.setIcon(icon); frame.getContentPane().add(label, BorderLayout.CENTER); frame.setSize(WIDTH, HEIGHT+22); frame.setVisible(true); } </code></pre> <p>One last thing is that the save works for some processing classes better than others, if you need to see any more code just ask, thanks</p>
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    1. USJFakult
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    1. COI have increased your rep, post the necessary images for better understanding of the problem.
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      1. USExtreme Coders
    2. COThose code snippets do not even indicate what image type is being used! For better help sooner, post an [SSCCE](http://sscce.org/).
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      1. USAndrew Thompson
    3. COOk, Thanks Andrew, i guess i should have made it more clear that I exhausted all the image types that ImageIO.write() supports with the same results every time. I neglected to post the rest of the code because i know that the error lies somewhere in the ImageIO or BufferedImage interaction (I'm not too familiar with them). If a fix can't be found, i can live with it and spaghetti patch my way around it somehow... Bottom line: is there some way that i can make my saved file look exactly the same as the output through the JFrame?
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