FPGA based image processing unit usage in coin detection and counting

Processing enhancement of a digital Image is really important now a day, as it plays a crucial role in mobile technology, multimedia, medicine and several DSP applications. The solution to enhance the quality of systems linked to image processing is hardware based processing of an image by using FPGA´S. In this, a discussion about implementation of circle detection and coin counting is done by changing brightness, threshold and contrast of a digital image and simulated result by the help of a language for description of hardware, verilog was done. Algorithm for step wise implementation of Brightness manipulation, Operating Threshold and Contrast stretching is implemented which gives an efficient implementation than normal edge detecting kind of counting coins.