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Effect of Range Reduction in Video/Image Compression 1.0

  Date Added: May 02, 2013  |  Visits: 262

Effect of Range Reduction in Video/Image Compression

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This script demonstrates the influence of range reduction algorithm at low bitrate encoding using JPEG encode. The range [0-255] of pixel values is mapped to [64-235] in this script using a look-up-table. Subsequently, the file is compressed to achieve the same bit-rate (file size) as that of the compressed full range image. (The quality factor chosen may need adjustment if changing the input image.) The compressed files are uncompressed for quality comparison. In case of range reduction, the range is restored back on uncompression. SSIM is used for quality metrics. The effect of range reduction is to increase spatial correlation of neighborhood pixels and thereby improving compression ratio.

Requirements: No special requirements
Platforms: Matlab
Keyword: Adjustment Changing Chosen Comparison Compression Correlation Effect Files Improving Increase Input Metrics Neighborhood Pixels Ratio Restored Spatial Uncompressed Uncompression
Users rating: 0/10

License: Freeware Size: 10 KB
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