Patent
Method and apparatus for selectively adjusting the brightness of large regions of an image
TLDR
In this paper, a method for rendering scene information in images having a large dynamic range is proposed, i.e. sunny and shady areas. But the method is not suitable for outdoor scenes.Abstract:
The invention concerns a method for rendering scene information in images having a large dynamic range, i.e. sunny and shady areas. The method takes particular advantage of image segmentation and computations employed in compression of images for electronic still photography. In distinguishing large areas, the method selectively adjusts the brightness of all portions of the area without necessarily preserving contrast which avoids halo artifacts. Those portions in areas of intermediate size are subjected to a smoothing feature which avoids the production of artifacts in the form of a line at the boundary.read more
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Image processing apparatus
TL;DR: In this article, an image processing apparatus comprises a receiving device for receiving encoded image data which is encoded by using orthogonal transform in a predetermined block unit, an error detecting device for detecting a transmission error of the encoded data, a correcting device for correcting the transmission error in the predetermined block units, and a decoding device for decoding the encoded image and outputting image data for reproducing an image.
Patent
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
TL;DR: In this paper, a reversible wavelet filter is used to generate coefficients from input data, such as image data, and an entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
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System and method for transmitting a digital image over a communication network
Shai Dekel,Alexander Ovsiankin +1 more
TL;DR: In this paper, a real-time image streaming system based on wavelet base is described, which is based on the Pixels-On-Demand (POPSOD) architecture.
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Compression/decompression using reversible embedded wavelets
TL;DR: In this article, a reversible wavelet filter is used to generate coefficients from input data, such as image data, and an entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
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Reversible wavelet transform and embedded codestream manipulation
TL;DR: In this article, a reversible wavelet filter is used to generate coefficients from input data such as image data and an entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
References
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Patent
Image preprocessing procedure for noise removal
TL;DR: In this article, a method for removing noise in the form of small black spots in a black and white raster picture is proposed, which includes the following steps: Generating a moving window of 5×5 picture elements having an inner window (R1) of nine and a surrounding outer window of sixteen picture elements; detecting for each such window whether there are more black picture elements in the inner window than a given threshold.
Patent
Apparatus for smoothing jagged border lines
TL;DR: In this paper, the authors smoothed border lines between image components of a reproduction image or the image of a display visually at first by giving weight coefficients to a center pixel and the surrounding pixels thereof, and then by obtaining values for designating middle level densities to be used for the smoothing according to the sum of the coefficients.
Patent
Image processing method
TL;DR: In this article, a method for expressing a halftone-including original image with binary black-and-white pixels and reproducing the original image in the form of a binary-coded output is presented.
Patent
Two tone and multiple image discrimination and signal binarization system
TL;DR: In this paper, an image signal binarization system for documents containing a mixture of two level and multiple level tone areas, such as characters and photographs, would provide an improved output if the system could distinguish between the two areas and respond accordingly.