Two adjustments can be used with histograms: histogram contrast and histogram equalization. Both routines are point operations, meaning that each output pixel's color/gray level is determined by the color/gray level of the corresponding input pixel only.
The histogram contrast routine changes the contrast of a given image by stretching the histogram. To use this function,
For more specific information on this function, see documentation provided for the X-Function imgHistcontrast in the Origin X-Function reference file. This can be accessed from the Command Window by typing