Fast Median Filtering Algorithm Based on CUDA
To realize median filtering algorithm efficiently on CUDA platform,uses a special fast median filtering algorithm.A big improvement has been made on the selected algorithm according to the features of GPU computing.The improved algorithm uses texture memory to store data sources,shared memory and registers to store operations result.And by the method that threads in the same block can share sorted results,the number needed to compare in the computing process is rapidly reduced.Experimental result shows that the improved fast median filtering algorithm makes full use of the parallel processing ability of GPU,with a speed which is at most 6597 times faster than the algorithm based on CPU,proves that it can be effectively applied in real-time image processing.