Sentence examples for quantization matrix from inspiring English sources
By the use of this quantization matrix, each subband is quantized by a value that weights the overall resulting quantized image at the threshold of artifacts visibility.
In our system, the Coordinator maintains the "base" quantization matrix and loads it into the quantizer making the steps to pass through a multiplier.
where B is the 8 × 8 block of the image pixels; a' is the block of original DCT coefficients; a q is the block of DCT coefficients divided by corresponding coefficients from quantization matrix Q; a r is the block of quantized DCT coefficients; Q f is a quality factor.
The noise detection thresholds of coefficients in each color component are derived in a locally adaptive fashion based on the wavelet decomposition, by which perceptually significant coefficients are selected and a perceptually lossless quantization matrix is constructed for embedding watermarks.
(c1) The quantization matrix for QF2 = 50.
More specifically, these frames are first transformed, with a block based DCT, and then quantized thanks to proper quantization matrices.
Each DCT band is independently quantized using a collection of predefined quantization matrices (QMs) [26], where the DC and the AC bands are quantized with a uniform and double-deadzone scalar quantizer, respectively.
For the latter purpose, the quantization matrices from[36, 37] define uniform and double-deadzone quantizers for the DC and AC frequency bands, respectively.
The quantization matrices used have been designed according to the properties of the employed transform.
Figure 5 Quantization matrices.
