Abstract
With the advancement of imaging technology, high dynamic range (HDR)
images can now be captured and displayed to produce realistic effects.
Tone mapping operators (TMOs) are used to map HDR radiance to the
displayable range. A reliable TMO would play a significant role in the
accurate reproduction of HDR scenes. The present study aimed to
establish an image quality metric based on external references to
evaluate various TMOs. Two psychophysical experiments were conducted
to develop reference images and to investigate the performance of
TMOs. In experiment 1, a set of high quality reference images was
developed by rendering image features in terms of contrast, sharpness,
and colorfulness, to achieve good rendering for each image. The images
were used as reference in experiment 2 to evaluate the performance of
14 TMOs using a six-point categorical judgment method. The TMOs were
evaluated using four scales, i.e., contrast, sharpness, colorfulness,
and overall performance. The hierarchical relationship among TMOs was
established. The results were further compared with previous studies,
and high correlation was found between the current experiments and
previous studies.
Subject
Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
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