Scale-based approach for image quality evaluation

Kameswara Rao Namuduri; Romain Murenzi; Lance M. Kaplan

doi:10.1117/12.302436

1 April 1998 Scale-based approach for image quality evaluation

Kameswara Rao Namuduri, Romain Murenzi, Lance M. Kaplan

Proceedings Volume 3308, Very High Resolution and Quality Imaging III; (1998) https://doi.org/10.1117/12.302436
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

In images, anomalies such as edges or object boundaries take on a perceptual significance that is far greater than their numerical energy contribution to the image. Wavelet transform highlights these anomalies by representing them with significant coefficients. The contribution of a wavelet coefficient to the perceptual quality of the image is related to its magnitude. Degradation in image quality due to image compression reflects in the form of reduction in the magnitude of the wavelet coefficients. Since, significant wavelet coefficients appear across different scales and orientations, it is important to observe the wavelet transform at different scales and orientations. In this paper, the wavelet transform of a given image and the reconstructed images at various quality levels are represented in the form of energy density plots suggested in reference one. A quality metric is proposed based on the absolute difference between the energy densities corresponding to the original and reconstructed images. Preliminary results obtained using the scale-based image quality evaluation strategy are reported.

Citation Download Citation

Kameswara Rao Namuduri, Romain Murenzi, and Lance M. Kaplan "Scale-based approach for image quality evaluation", Proc. SPIE 3308, Very High Resolution and Quality Imaging III, (1 April 1998); https://doi.org/10.1117/12.302436

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