Then there are all the same kind of formats with swapped channels (eg. TYPE_USHORT_555_RGB and TYPE_USHORT_565_RGB, 2 bytes per pixel, much less colors, don't need to use it unless you have memory constraints.TYPE_INT_RGB, 4 bytes per pixel without alpha channel.TYPE_INT_ARGB_PRE, 4 bytes per pixel, same as before but colors are already multiplied by the alpha of the pixel to save computations.TYPE_INT_ARGB, 4 bytes per pixel with alpha channel.Skipping the alpha channel when working with 8 bits per channel won't affect the total memory occupied by the image since every pixel will be packed in an int in any case so 8 bits will be discarded. Unless you have specific requirements (for example saving memory or saving computations or a specific native pixel format) just go with the default TYPE_INT_ARGB which has 8 bits per channel, 3 channels + alpha. In each image type, pixels are stored in different formats.
Image Processing Toolbox supports binary, indexed, grayscale, and truecolor image types. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation. Convert between the image types, such as RGB (truecolor), binary, grayscale, and indexed images, and change the data type of an image. Represents an image with 8-bit RGB color components, corresponding to a Windows- or Solaris- style BGR color model, with the colors Blue, Green, and Red packed into integer pixels. I read the description in the Java Doc many times, but just couldn't figure out how should we use it. Which image type should we use if we just want to create How would an image type affect the BufferedImage to be created? Does it control the number of bits used to store various colors (Red,Green,Blue) and its transparency? However, Java docs did a minimal explanation what these image types are used for and how would it affect the BufferedImage to be created. Java BufferedImage class has a long list of class variables known as the image type which can be used as an argument for the BufferedImage constructor.
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