How does a BufferedImage store the image?

Hello
I have to read the colors of different pixels in a BufferedImage which is bigger than 1800x1800 pixels. Im using getRGB(x,y) to get the pixels color. Is the image in the BufferedImage stored in its compressed form (png) and does it therefore always have to decompressed when i call getRGB(x,y)?

Huttu wrote:
Because there are several images for different purposes I store them in a zip-file. I load them using an ImageIO.read(zipFile.getInputStream(ZipEntry));I am totally out of my league here, but what if you create a BufferedInputStream with the inputStream obtained from the zipFile, and read with that?
BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(ZipEntry));
ImageIO.read(bis);Again, this is a SWAG, so I have no idea if it will help or not. Also, I have not compiled or run this.

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