Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/208153
Title: Dynamic RGB-to-CMYK conversion using visual contrast optimisation
Authors: Zhihua Chen;Zhenzhu Wang;Bin Sheng;Chao Li;Ruimin Shen;Ping Li
Year: 2017
Publisher: IET
Abstract: As the standard colour space used by printers, Cyan, Magenta, Yellow, Black (CMYK) colour model is a subtractive colour space used to describe the printing process. Existing CMYK conversion methods rely on static conversion table, which may not preserve the subtle visual structures of images, due to the local visual contrast loss caused by the static colour mapping. Therefore, the authors propose a novel dynamic Red, Green, Blue (RGB)-to-CMYK colour conversion, which utilises the weighted entropy to extract the pixels with filter response change dramatically. They obtain the image activity map by combining these pixels with high skin probability regions, and optimise the colour conversion of each pixel to ensure that the ink used for each pixel can be saved, while the visual contrast can be preserved with ink-saving. In this way, their proposed technique can achieve dynamic CMYK colour conversion, in which the consumption of ink can be reduced without the loss of visual contrast. The experimental results have shown that their dynamic CMYK colour conversion saved 10-25% ink consumption compared with the static conversion method, while with high visual quality for the converted images.
URI: http://localhost/handle/Hannan/208153
volume: 11
issue: 7
More Information: 539,
549
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7972771.pdf9.91 MBAdobe PDF
Title: Dynamic RGB-to-CMYK conversion using visual contrast optimisation
Authors: Zhihua Chen;Zhenzhu Wang;Bin Sheng;Chao Li;Ruimin Shen;Ping Li
Year: 2017
Publisher: IET
Abstract: As the standard colour space used by printers, Cyan, Magenta, Yellow, Black (CMYK) colour model is a subtractive colour space used to describe the printing process. Existing CMYK conversion methods rely on static conversion table, which may not preserve the subtle visual structures of images, due to the local visual contrast loss caused by the static colour mapping. Therefore, the authors propose a novel dynamic Red, Green, Blue (RGB)-to-CMYK colour conversion, which utilises the weighted entropy to extract the pixels with filter response change dramatically. They obtain the image activity map by combining these pixels with high skin probability regions, and optimise the colour conversion of each pixel to ensure that the ink used for each pixel can be saved, while the visual contrast can be preserved with ink-saving. In this way, their proposed technique can achieve dynamic CMYK colour conversion, in which the consumption of ink can be reduced without the loss of visual contrast. The experimental results have shown that their dynamic CMYK colour conversion saved 10-25% ink consumption compared with the static conversion method, while with high visual quality for the converted images.
URI: http://localhost/handle/Hannan/208153
volume: 11
issue: 7
More Information: 539,
549
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7972771.pdf9.91 MBAdobe PDF
Title: Dynamic RGB-to-CMYK conversion using visual contrast optimisation
Authors: Zhihua Chen;Zhenzhu Wang;Bin Sheng;Chao Li;Ruimin Shen;Ping Li
Year: 2017
Publisher: IET
Abstract: As the standard colour space used by printers, Cyan, Magenta, Yellow, Black (CMYK) colour model is a subtractive colour space used to describe the printing process. Existing CMYK conversion methods rely on static conversion table, which may not preserve the subtle visual structures of images, due to the local visual contrast loss caused by the static colour mapping. Therefore, the authors propose a novel dynamic Red, Green, Blue (RGB)-to-CMYK colour conversion, which utilises the weighted entropy to extract the pixels with filter response change dramatically. They obtain the image activity map by combining these pixels with high skin probability regions, and optimise the colour conversion of each pixel to ensure that the ink used for each pixel can be saved, while the visual contrast can be preserved with ink-saving. In this way, their proposed technique can achieve dynamic CMYK colour conversion, in which the consumption of ink can be reduced without the loss of visual contrast. The experimental results have shown that their dynamic CMYK colour conversion saved 10-25% ink consumption compared with the static conversion method, while with high visual quality for the converted images.
URI: http://localhost/handle/Hannan/208153
volume: 11
issue: 7
More Information: 539,
549
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7972771.pdf9.91 MBAdobe PDF