Techniques and standards for image, video, and audio coding
Techniques and standards for image, video, and audio coding
Improved coding of transform coefficients in JPEG-like image compression schemes
Pattern Recognition Letters
Image and Video Compression for Multimedia Engineering
Image and Video Compression for Multimedia Engineering
An efficient algorithm for optimizing DCT quantization
IEEE Transactions on Image Processing
Improving image quality for JPEG compression
KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part III
Segmenting focused objects based on the Amplitude Decomposition Model
Pattern Recognition Letters
An innovative blemish detection system for curved LED lenses
Expert Systems with Applications: An International Journal
| Hi-index | 0.10 |
This paper describes a new adaptive coding technique to the coding of transform coefficients used in block based image compression schemes. The presence and orientation of the edge information in a sub-block are used to select different quantization tables and zigzag scan paths to cater for the local image pattern. Measures of the edge presence and edge orientation in a sub-block are calculated out of their DCT coefficients, and each sub-block can be classified into four different edge patterns. Experimental results show that compared to JPEG and the improved HVS-based coding, the new scheme has significantly increased the compression ratio without sacrificing the reconstructed image quality.