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where H˜ is a diagonal matrix and H˜* denotes the complex conjugate of H˜. The diagonal elements of H˜ are just the 2D DFT coefficients h˜i of the PSF of this circulant problem (diag[H˜]=h˜=Fh, where h is given by, for example, the first column of H). Applyin...
providing a much more accurate result. This is especially noticeable in thumbnails that have diagonal lines that get jagged during down-sizing with QUALITY or lower methods. The quality of the ULTRA_QUALITY scaling method is almost on par with the image resize functionality built into Mac OS X;...
Unlike other resources, quantum coherence is a basis dependent quantity, a quantum state ρ is said to be incoherent in a given reference basis \(\{ \vert i \rangle \}\), if the state is diagonal in this basis, i.e., if \(\rho = {\sum_{i}}p_{i} \vert i \rangle \langle ...
Note that since AVIR implements orthogonal resizing, it may exhibit diagonal aliasing artifacts. These artifacts are usually suppressed by EWA or radial filtering techniques. EWA-like technique is not implemented in AVIR, because it requires considerably more computing resources and may produce a blurr...
Processing preferably proceeds generally transverse (preferably skewed, ideally at 45°) to data rows, with final error distribution into each pixel when it is the "left pixel" (or when it is the "next pixel" if it is at the top of a row group) . For pixels at the top of each ...
We might mention that many image sequences collected by visible, infrared, and other scanners are corrupted by random and burst noise (including line dropout). Reducing the noise will not only improve the visual appearance of the sequence but also facilitate automatic target detection, recognition,...
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PURPOSE: To realize a high quality color.halftoning by using the error propagation method of a masaic.color display device and specifying the errors propagated to a first element on the diagonal line. CONSTITUTION: A picture element i(m, n) has a luminance value I(m, n) which is one of...
An image hiding scheme is proposed based on the scrambling process composed of the rotation of the squared sub-image in the gyrator transform domains. A squared sub-image is first selected from a secret image and is rotated along an axis, which is the center line or diagonal line of the ...