kalyousefi / histogram_equalization

Tool that uses histogram equalization to adjust image contrast

histogram_equalization

• Equalizes the contrast of an image using a histogram
• Spreads out the contrast
• Lighter areas become darker and darker areas become lighter
• Makes it easier to identify features in an image
• A cummulative distribution function is used to find the new gray value of a pixel
• Usage: python histogram_equalization.py -i <inputf> [-o <outputf> -t <transferf> -a <histinf> -b <histoutf>]
• -o specifies output image path, -t specifies transfer function plot path, -a specifies input histogram path, -b specifies output histogram path

Input Image

Output Image (after histogram equalization)

Transfer Function

Input Histogram

Output Histogram