In practice this means an Adobe APP14 segment specifying the RGB colorspace, and passing in an RGB-encoded buffer.
The use case is for images which are not natural scenes, but instead use the RGB channels to pack some other distinct information (e.g. different fluorescent dyes in microscopy). Transforming the color space before quantization will cause different artefacts compared to untransformed data.
In practice this means an Adobe APP14 segment specifying the RGB colorspace, and passing in an RGB-encoded buffer.
The use case is for images which are not natural scenes, but instead use the RGB channels to pack some other distinct information (e.g. different fluorescent dyes in microscopy). Transforming the color space before quantization will cause different artefacts compared to untransformed data.