Blind image compression history determination using dynamic thresholding
| Autor: | Tadashi Shibata, R. Grou-Szabo |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Morphological gradient
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Image processing Edge detection Digital image Image texture Digital image processing Computer vision Image gradient Feature detection (computer vision) Pixel Standard test image Color image business.industry Binary image Edge enhancement computer.file_format Block Truncation Coding Thresholding Bitmap Artificial intelligence Raster graphics business computer Color Cell Compression Image compression Data compression |
| Zdroj: | ICASSP |
| ISSN: | 1520-6149 |
| DOI: | 10.1109/icassp.2008.4517782 |
| Popis: | In certain situations, a software application or even a hardware processing unit receives image data in a raster format, such as in a bitmap file, without any knowledge of what, if any, prior processing has occurred to it. If further processing is intended, it can be helpful or even necessary to know of an image's processing history. Using a directional edge detector with a dynamic thresholding technique, an algorithm as been developed that can determine an image's compression history using only the raster bitmap information. By accentuating an image's block boundaries and then subsequently comparing the edge count at the block boundary with the edge count the pixel row right below, the compression history of images compressed up to a Quality Factor of 100 can be determined. |
| Databáze: | OpenAIRE |
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