IEEE Trans Image Process - Luma-chroma space filter design for subpixel-based monochrome image downsampling.

Tópicos

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{ problem(2511) optim(1539) algorithm(950) }
{ algorithm(1844) comput(1787) effici(935) }
{ method(984) reconstruct(947) comput(926) }
{ structur(1116) can(940) graph(676) }
{ imag(1947) propos(1133) code(1026) }
{ measur(2081) correl(1212) valu(896) }
{ signal(2180) analysi(812) frequenc(800) }
{ cost(1906) reduc(1198) effect(832) }
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{ detect(2391) sensit(1101) algorithm(908) }

Resumo

In general, subpixel-based downsampling can achieve higher apparent resolution of the down-sampled images on LCD or OLED displays than pixel-based downsampling. With the frequency domain analysis of subpixel-based downsampling, we discover special characteristics of the luma-chroma color transform choice for monochrome images. With these, we model the anti-aliasing filter design for subpixel-based monochrome image downsampling as a human visual system-based optimization problem with a two-term cost function and obtain a closed-form solution. One cost term measures the luminance distortion and the other term measures the chrominance aliasing in our chosen luma-chroma space. Simulation results suggest that the proposed method can achieve sharper down-sampled gray/font images compared with conventional pixel and subpixel-based methods, without noticeable color fringing artifacts.

Resumo Limpo

general subpixelbas downsampl can achiev higher appar resolut downsampl imag lcd ole display pixelbas downsampl frequenc domain analysi subpixelbas downsampl discov special characterist lumachroma color transform choic monochrom imag model antialias filter design subpixelbas monochrom imag downsampl human visual systembas optim problem twoterm cost function obtain closedform solut one cost term measur lumin distort term measur chromin alias chosen lumachroma space simul result suggest propos method can achiev sharper downsampl grayfont imag compar convent pixel subpixelbas method without notic color fring artifact

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