Revision as of 20:27, 18 June 2008 edit 87.102.22.83 (talk) →Color quantization ← Previous edit		Revision as of 16:54, 30 December 2008 edit undo 91.177.65.225 (talk) →Quantization matrices Next edit →
Line 16: A quantization matrix is used in combination with a DCT coefficient matrix to carry out the previously mentioned transformation. Quantization matrices are often specifically designed to keep certain frequencies in the source to avoid losing image quality. Many video encoders, such as [[Xvid]], [[3ivx]] and [[H.264/AVC]] allow custom matrices to be used. This is an example of DCT coefficient matrix: <!--NOTE: this matrix was generated using random numbers and the other two matricies. It may not actually work well with an iDCT. --> :<math>

Quantization (image processing): Difference between revisions