Compare this with the corresponding enhancement achieved using histogram equalization . Normalization can also be used when converting from one image type to another, for instance from floating point pixel values to 8-bit integer pixel values. As an example the pixel values in the floating point image might run from 0 to 5000. Obviously some information might be lost in the compression process, but the relative intensities of the pixels will be preserved. Interactive Experimentation You can interactively experiment with this operator by clicking here .
Exercises Derive the scaling formula given above from the parameters a , b , c and d .
Imagine you have an image taken in low light levels and which, as a result, has low contrast. Local Information Specific information about this operator may be found here. More general advice about the local HIPR installation is available in the Local Information introductory section.