Program "Image area selection and edge detection" is useful tool for Graphic Designers, Web Developers and others. It let you to select part of image on it color properties and to measure area of selection. Border of selection determines contour line. Length of contour line can be measured too. You can to cut selected part an to copy it to clipboard or to paint it by specifyed color. Program let you to measure difference or distance between two colors and provide conversion from one color model to other. In the program the following models of color are used: RGB, HSL, HSB, Lab, LabtoCH, LUV, YcbCr, YUV, CMYk, XYZ, HunterLab, Yxy. Formulas for color differences use the CIE Lab color space. There are three base formulas that are used to obtain dE