Mixed Raster Content: Segmentation, Compression, Transmission


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Segmentation, Compression, Transmission

In turn, the second chapter reviews data coding and compression methods so as to set the background and demonstrate the complexity involved in dealing with MRC. Chapter three addresses the segmentation of images through an extensive literature review, which highlights the various approaches used to tackle MRC segmentation. The second part of the book focuses on the segmentation of color images for optimized compression, including multi-layered decomposition and representation of MRC and the processes that can be employed to optimize the coding rates of those different layers.

Rounding out the coverage, the final chapter examines the segmentation of color images for optimized transmission. The following ISBNs are associated with this title:.

2018 Mixed Raster Content: Segmentation, Compression, Transmission

ISBN - X. ISBN - Vision and color theory.


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Mixed Raster Content - Segmentation, Compression, Transmission | George Pavlidis | Springer

Chrome On the Control button top right of browser , select Settings from dropdown. Under the header JavaScript select the following radio button: Allow all sites to run JavaScript recommended. This operation removes the black text from the background image and creates a smooth transitioned background plane. After these operations, the mask plane can be compressed using lossless binary compression method and the background can be compressed using a lossy contone compression method.

If the number of text pixels in the block is more than certain threshold, such as 20 out of pixels in the block, step 42 then the block is assigned 11 if it is already 10, or 01 if it is still 00 step Once the entire original image is processed block by block ending at step 48 , the accumulated tag image can then be analyzed as a whole to determine the content of the page.

If, in the tag image, there are more blocks that have either 11 or 01 value than a threshold block number step 50 , then the mask plane is not empty. The mask plane is then compressed and handled as regular case step Otherwise, the mask plane is empty, and the mask plane emptiness flag is set step No mask plane compression will happen, the mask plane is removed, and the resultant MRC file will have only a background plane. If a threshold number of blocks in the tag image have been assigned either 10 or 11 step 56 , then the background plane contains more than highlight area if any.

The background plane is then compressed using a nominal compression scheme, which is down-sampled into half resolution and compressed using less aggressive quantization step Otherwise the highlight detection operation will be activated to process the background further. If substantially all the blocks of the tag image have only a 00 or 01 value, then further highlight checking is needed, as can be seen in the continuation of the method shown in FIG.


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The highlight checking is done by determining if a threshold number of pixels inside each block have near white pixel value, for instance, between and step If this is the case, then the block will be assigned as 01 step 68 ; otherwise, it will be reset to be 00 step After highlight examination, if fewer than a threshold number of blocks, such as 20, have been detected that have highlight content with tag pixel value of 01 step 70 , then the whole background is judged to be blank, and the background emptiness flag is set step Otherwise, the background contains highlight areas, which may be aggressively sub-sampled, or otherwise aggressively compressed, to improve the file size step If both mask plane emptiness flag and background plane emptiness flag is set step 78 , then the page is empty, it can be disregarded or compressed as single pixel image step A method of processing an image file comprising at least a mask plane and a background plane, comprising: determining that at least one of the mask plane and background plane is substantially empty; and.

The method of claim 1 , further comprising determining that both the mask plane and background plane are substantially empty; and. The method of claim 1 , further comprising determining an extent of highlight pixels in the image. The method of claim 3 , further comprising as a result of determining an extent of highlight pixels in the image, determining that the background plane is empty.

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The method of claim 3 , the determining an extent of highlight pixels in the image including considering the image file as a set of blocks in an image,. The method of claim 1 , the determining including modifying the mask plane, the modifying including assigning a subset of pixels in the mask plane to the background plane, and.

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Reduce Documents and Images without Losing Quality with MRC Compression

The method of claim 6 , the modifying the mask plane including determining that a pixel in the mask plane is not associated with text. The method of claim 6 , the determining an extent of the subset of pixels assigned from the mask plane to the background plane including considering the image file as a set of blocks in an image,.

The method of claim 1 , the determining including modifying the background plane, the modifying including removing pixels associated with text from the background plane,. The method of claim 10 , modifying the background plane including replacing a pixel in the background plane that corresponds to black text with a value of at least one pixel that is not classified as text.

The method of claim 10 , the determining an extent of the pixels associated with black text in the background plane including considering the image file as a set of blocks in an image,. The method of claim 1 , further comprising determining an extent of near-white pixels in the background plane; and.

USB2 en.

Latest Xerox Corporation Patents:

Image compressing apparatus, image outputting apparatus, and image compressing method. System and method for efficient storage of MRC images for easy classification and retrieval. System and method for adaptively compressing data having noisy images using lossless compression. Using encoding cost data for segmentation and background suppression in JPEG-compressed images.

Mixed Raster Content

Method and apparatus for segmenting an image using a combination of image segmentation techniques. Image compressing apparatus which extracts black text edge pixels from an image and compresses a layer with black text edge pixels extracted. EPB1 en. CNC en.


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JPB2 en. USA1 en. Image processing apparatus and method, computer program, and computer readable storage medium. EPA2 en. Method for generating anti-aliased text and line graphics in compressed document images. Image processing system, a control method for an image processing apparatus, a program and a recording medium.

USB1 en. Method including lossless compression of luminance channel and lossy compression of chrominance channels. Image processing device, image processing method, program for executing image processing, and computer readable recording medium on which the program is stored.

Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission
Mixed Raster Content: Segmentation, Compression, Transmission Mixed Raster Content: Segmentation, Compression, Transmission

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