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The detection of region of interest (ROI) in medical images has played a very important role in computer aided diagnose. With respect to liver-focus pixels having weak textural and similar intensities with their neighborhood, a novel detection algorithm of abnormal regions in liver CT images has been proposed in this paper by visual attention model. Firstly, a set of statistical texture features for...
Nowadays, breast cancer has become one of the most dangerous tumors for middle-aged and older women in China. Mammography plays an important role in the clinical diagnosis of breast cancer, and microcalcifications (MCs) are one of the main symptoms in the mammograms. In order to assist the radiologists to detect the MCs accurately and rapidly, a novel computer-aided diagnosis method was proposed in...
An automatic monitoring system was developed for simultaneous determination of trace zinc, cadmium, lead, copper, iron and arsenic in environmental aqueous media using electrochemical stripping voltammetry. The sensor was mercury-film silver-based electrode. With a potentiostat, several pumps and valves controlled by computer, the system realized in-situ real-time detection of the six heavy metal...
This paper proposes an integer-to-integer shape adaptive discrete wavelet transform(ISA-DWT) coding scheme for CT(computed tomography) image. The scheme consists of (1) extraction of shape information of the foreground of CT image; (2) integer-to-integer shape adaptive discrete wavelet transform; (3) the modified SPIHT algorithm. In CT image, the foreground contains useful clinical information and...
In this paper, an alternative formulation of orthogonal locality preserving projections (OLPP) is proposed. Schur-OLPP introduces Schur decomposition in locality preserving projections (LPP) to get the orthogonal vectors and extracts discriminant features. The proposed method was tested and evaluated using the Yale and AR face databases. Recognition rates were compared with Eigenface, Fisherface and...
This paper proposes a new rate control algorithm for H.264 based on the linear rate model and proportional-integer-derivative(PID) controller. It has been testified that the linear rate control algorithm can provide more accurate and robust rate control in various standard video coding systems, such as MPEG-2, H.263, MPEG-4 and H.264. Human is not only sensitive to a large distortion variation to...
Rate control plays an important role in real-time video communication application. Extensive experiments show that rho is still linear with the bit rate of a macroblock row in H.264. Based on this conclusion, this paper presents a macroblock row layer rate control algorithm for H.264 via rho -domain source modeling. The scene change is detected by PSNR-based complexity estimation and then a control...
A kind of integrated electronic tongue device has been developed, which includes a multiple light-addressable potentiometric sensor (MLAPS) and two groups of electrochemical electrodes. MLAPS is based on chalcogenide thin film for the simultaneous detection of Fe(III) and Cr(VI) ions while two groups of electrochemical electrodes, respectively, detect other heavy metals using stripping voltammetry...
A novel integrated electronic tongue has been developed for the concentration determination of trace heavy metal ions in aqueous media. It combines an Au microelectrodes array (AuMEA) with a multiple lightaddressable potentiometric sensor (MLAPS) on a silicon substrate. AuMEA contains 30 times 30 individual 10 mum diameter Au disk microelectrodes, upon which thin mercury film is electrodeposited....
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