An improved image enhancement algorithm based on fuzzy sets

An image enhancement method based on fuzzy sets is proposed in order to overcome the shortcomings of the P-K image enhancement algorithm. A new membership function is reconstructed in this paper, and it maps the image from space domain to fuzzy domain. The image is processed by fuzzy enhancement with repeated use of non-linear transformation. Finally, the fuzzy membership value is transformed with inverse operation, and the image´s enhanced gray value is got. The results show that the improved algorithm effectively overcomes the shortcomings of the P-K algorithm and retains the age information of the low gray value in the image. Therefore the improved algorithm in this paper is effective.