Motion Estimation （ME） is considerate one of the most important compression methods. However, ME involves high computational complexity. The main goal is to reduce power conception and the execution time without red...Motion Estimation （ME） is considerate one of the most important compression methods. However, ME involves high computational complexity. The main goal is to reduce power conception and the execution time without reducing image quality. In this paper, the authors have proposed high parallel processing architecture is presented for four-step search block-matching motion estimation. The proposed method is based on the stoppable clock models. The architecture has been simulated and synthesized with VHDL and ASIC （CMOS 45 nm）. Synthesize results show that the proposed architecture reduces the power consumption and achieves a high performance for real time motion estimation.展开更多
To the Editor The interesting report by Redfors, et aL[1] in the June issue of the Journal of Geriatric Cardiology, about an 88-year-old woman who presented with chest pain, found on echocardiography （ECHO） to have...To the Editor The interesting report by Redfors, et aL[1] in the June issue of the Journal of Geriatric Cardiology, about an 88-year-old woman who presented with chest pain, found on echocardiography （ECHO） to have transient left ventricular apical akinesis with a hypercontractile base, and an occluded first diagonal coronary branch with suspected acute plaque rupture, on coronary angiography, treated with a percutaneous coronary intervention, for which the authors concluded that the observed extent of akinesis was disproportionally large for the occluded coronary lesion, letting them to deduce that the acute myocardial infarction （AMI） caused the episode of Takotsubo syndrome （TTS）, reminds me of a similar case of an AMI due to stent thrombosis and a resultant associated TTS.展开更多
Aiming at the shortcoming that certain existing blockingmatching algorithrns, such as full search, three-step search, and dia- mond search algorithms, usually can not keep a good balance between high acoaracy and low ...Aiming at the shortcoming that certain existing blockingmatching algorithrns, such as full search, three-step search, and dia- mond search algorithms, usually can not keep a good balance between high acoaracy and low computational complexity, a block-maching motion estimation algorithm based on two-step search is proposed in this paper. According to the fact that the gray values of adjacent pixels will not vary fast, the algorithm employs an interlaced search pattem in the search window to estimate the motion vector of the objectblock. Simulation and actual experiments demanstrate that the proposed algmithm greatly outperforms the well-known three-step search and dianond search algoritlam, no matter the motion vector is large or small. Comparedc with the full search algorithm, the proposed one achieves similar peffomance but requires much less computation, therefore, the algorithm is well qualified for real-time video image processing.展开更多
文摘Motion Estimation （ME） is considerate one of the most important compression methods. However, ME involves high computational complexity. The main goal is to reduce power conception and the execution time without reducing image quality. In this paper, the authors have proposed high parallel processing architecture is presented for four-step search block-matching motion estimation. The proposed method is based on the stoppable clock models. The architecture has been simulated and synthesized with VHDL and ASIC （CMOS 45 nm）. Synthesize results show that the proposed architecture reduces the power consumption and achieves a high performance for real time motion estimation.
文摘To the Editor The interesting report by Redfors, et aL[1] in the June issue of the Journal of Geriatric Cardiology, about an 88-year-old woman who presented with chest pain, found on echocardiography （ECHO） to have transient left ventricular apical akinesis with a hypercontractile base, and an occluded first diagonal coronary branch with suspected acute plaque rupture, on coronary angiography, treated with a percutaneous coronary intervention, for which the authors concluded that the observed extent of akinesis was disproportionally large for the occluded coronary lesion, letting them to deduce that the acute myocardial infarction （AMI） caused the episode of Takotsubo syndrome （TTS）, reminds me of a similar case of an AMI due to stent thrombosis and a resultant associated TTS.
基金supported by the Lab Open Fund of Beijing Microchemical Research Institute(P2008026EB)
文摘Aiming at the shortcoming that certain existing blockingmatching algorithrns, such as full search, three-step search, and dia- mond search algorithms, usually can not keep a good balance between high acoaracy and low computational complexity, a block-maching motion estimation algorithm based on two-step search is proposed in this paper. According to the fact that the gray values of adjacent pixels will not vary fast, the algorithm employs an interlaced search pattem in the search window to estimate the motion vector of the objectblock. Simulation and actual experiments demanstrate that the proposed algmithm greatly outperforms the well-known three-step search and dianond search algoritlam, no matter the motion vector is large or small. Comparedc with the full search algorithm, the proposed one achieves similar peffomance but requires much less computation, therefore, the algorithm is well qualified for real-time video image processing.
