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Thread: image compare

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    Junior Member ana0429's Avatar
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    Default image compare

    hi i am new here and started to study java programming (almost a week now).
    I have project that is called image comparison.
    This is the problem description.
    1.Program will convert image (jpg) to RGB values and send this values to csv file.
    2.program will identify the differences of the test image compare to the original image.
    -- Compare Red average ,Green Average and Blue average of original image to test image
    this what it looks like. Hope you can help me regarding on this..see attached
    sampleresult.jpg


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    Default Re: image compare

    Wow! One week into java and you are already taking on Image Manipulation. This is a pretty intense topic so make sure you can walk before you run.

    I wrote a tutorial on Image Processing. The theory section may be helpful. Basically, you will be loading each of the images as a BufferedImage and then iterated through the pixels, constructing two, two dimensional arrays that hold the RGB value of each pixel. Then you need to write a method that compares the two arrays and looks for differences (nested for loops) and returning the results (a two dimensional array of booleans would work). This is the easy part. There are two hard parts. The first is highlighting the differences. You could construct a another image using the first image and the results of the comparison that draws the different pixels yellow for example. The other hard part is trying to identify movement or scaling differences. For example, if you crop the second image by 1 pixel at the top, this algorithm would falsely identify ALL pixels as being altered.

    Like I said, image processing is a pretty complex topic so make sure you have the fundamentals down pat before you tackle this assignment.

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