Code covered by the BSD License  

Highlights from
Effect of Range Reduction in Video/Image Compression

Be the first to rate this file! 26 Downloads (last 30 days) File Size: 3.93 KB File ID: #25697
image thumbnail

Effect of Range Reduction in Video/Image Compression

by

 

Range reduction demonstration using JPEG codecs.

| Watch this File

File Information
Description

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.

Required Products Image Processing Toolbox
Signal Processing Toolbox
MATLAB release MATLAB 7.6 (R2008a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.

Contact us