The Technique of Digit Image's Illumination Uneven Elimination

Aimed at the elimination of uneven illumination in digital images, existing techniques for the correction of unevenness of illumination are classified and discussed, and the basis of its algorithmic error analyzed. A new for the correction of unevenness elimination technique based on wavelet transference is proposed. By giving attention both to the frequency domain and space domain of the image, this technique results in better quality, less error in the resulting image, and the time spent is also relatively small.