No-Reference Perceptual Image Sharpness Index Using Normalized DCT-based Representation - Shuhong Jiao; Huan Qi; Weisi Lin (2014 Seventh International Symposium on Computational Intelligence and Design, 2014)
Keywords: discrete cosine transform; Discrete cosine transforms; Image quality; Indexes; Measurement; natural scene statistics; normalization; Probability; sharpness metric