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  • Last update: 5 years ago
  • Total downloads: 114
  • Operating system: Win All
  • Publisher: Rafal Mantiuk
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windows default iconHDR Visual Difference Predictor Publisher's description

HDR-VDP is a visual metric that compares a pair of images (a reference and a test image) and predicts

HDR-VDP is a visual metric that compares a pair of images (a reference and a test image) and predicts:

Visibility - what is the probability that the differences between the images are visible for an average observer;
Quality - what is the quality degradation with the respect to the reference image, expressed as a mean-opinion-score.

The HDR-VDP-2 works within the complete range of luminance the human eye can see. An input to the metric is a pair high dynamic range (HDR) images, or a pair ordinary 8-bits-per-color images, converted to the actual luminance values assuming a certain display model. The proposed metric takes into account the aspects of that are relevant for viewing high contrast stimuli, such as scattering of the light in the optics (OTF), the photoreceptor non-linear response to light, and local adaptation.

What's New in This Release:

В· The metric predicts both visibility (detection/discrimination) and image quality (mean-opinion-score).
В· The metric is based on new CSF measurements, made in the consistent viewing conditions for a large variety of background luminance and spatial frequencies.
В· The new metric models L-, M-, S-cone and rod sensitivities and is sensitive to different spectral characteristics of the incoming light.
В· Photoreceptor light sensitivity is modelled separately for cones and rods, though L- and M- cones share the same characteristic.
В· The intra-ocular light scatter function (glare) has been improved by fitting to the experimental data.
В· The metric uses a steerable pyramid rather than cortex transform to decompose image into spatially- and orientation-selective bands. Steerable filter introduces less ringing and in the general case is computationally more efficient.
В· The new model of contrast masking introduces inter-band masking and the effect of CSF flattening.
В· A simple spatial-integration formula us...

System Requirements:

В· Matlab
В· MatlabPyrTools
Program Release Status: New Release
Program Install Support: Install and Uninstall

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