Abstract
Graphical user interface is widespread in computer technology which is one of the major achievements,
which greatly facilitate the use of nonprofessional users, that people no longer need to be memorized a large number of orders, and through the window, the menu for operations. the graphical user interface
（ gui ） matlab application development in playing a very important role. A good interface is not only conducive to the user quickly in operating procedures and effectively use the program, but also beneficial to the developers matlab platforms to display the development of technology. gui in scientific research and engineering practice, practice is widely used, especially in the graphic processing technology and technical aspects. Images enhance is a basic image processing technology, the aim is to get to work, for specific applications for visual effect is more "good" and more "useful" image. the increase in the processing can enhance contrast ：to increase brightness and color effect— — with the improvement in the visual effect. As computers and information technology is developing at breakneck speed, the digital imaging technology have also been rapid development, has become a computer science, biology or medical science and engineering, information on the subject area between the object of study and research. The paper designed to achieve a gui for a simple and its main function is to separate the image with color contrast, the tone, saturation and brightness and color picture can be converted into ashes of the images and display the brightness of the change in image.
Keywords：graphical user interface、digital image、image processing
