I made this program to find out how to read, edit, and write an image one piece at a time in order to conserve memory. I needed to be able to do so with an 8256 x 4992 PNG image, which as raw data in memory would be 117MB, for my RuneLite Plugin World Heatmap. I was able to reduce peak memory usage from >300MB to 10MB using standard Java libraries.
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GrandTheftWalrus/PiecewiseImageReaderWriter
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Reads an image, edits it, and then writes it one piece at a time to reduce memory usage in Java
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