“Image Quality Metrics” by Chalmers, McNamara, Troscianko, Daly and Myszkowski

  • ©Alan Chalmers, Ann McNamara, Tom Troscianko, Scott Daly, and Karol Myszkowski



Entry Number: 44


    Image Quality Metrics

Course Organizer(s):



    Basic understanding of realistic image synthesis and some knowledge of visual perception. Prior knowledge of image quality metrics not required. 

    Fidelity of images, general principles of human visual perception, human perception of lightness, psychophysical techniques, computational models of perception (spatial and orientation channels and visual masking), and computational metrics (visual difference predictors, the Sarnoff model, and animation quality metrics).

    Advances in image synthesis allow very precise simulation of how light energy is distributed in a scene, but they do not ensure high perceptual fidelity. Contributing factors include: the limited dynamic range of displays, residual shortcomings of the rendering process, and the extent to which human vision encodes such departures from perfect physical realism. This course addressed techniques for comparing real and synthetic images, identifying important visual system characteristics, and significantly reducing rendering times. 


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