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Extraction the Reduced P-Image from H.264/AVC Compressed Bit Stream
Thy-Linh Nguyen,Hyung-suk Oh,Won-Ha Kim 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
The reduced or small size image extracting DC coefficients from the H.264/AVC compressed bit stream is sixteen times smaller than the original image. In its small size, this image still retains a significant amount of information. We propose a scheme directly generating the small image from H.264 compressed bit stream. We extract only DC values from transform coefficients of H.264 bit stream with higher resolution. DC values become pixel values of the small image. The proposed method requires much less computational load and memory access, compared to the conventional method that decodes the bit stream to produce images and down-samples the decoded images.
Determining mean corpuscular volume and red blood cell count using electrochemical collision events
Ho, Thy L.T.,Hoang, Nhung T.T.,Lee, Jungeun,Park, Jun Hui,Kim, Byung-Kwon Elsevier 2018 Biosensors & bioelectronics Vol.110 No.-
<P><B>Abstract</B></P> <P>Blood tests (e.g., red blood cell (RBC) count) are crucial for detecting, diagnosing, and monitoring the progression of blood disorders. Here, we report the development of a new and rapid method for electrochemically detecting RBCs using single-particle collision events. The principle of this method relies on the electrochemical oxidation of an electroactive redox species (potassium ferrocyanide) hindered by an RBC attached to an electrode surface. A decrease in staircase current, caused by the collision of RBCs on the electrode, was observed. The magnitude of this current decrease could provide quantitative information on the size and concentration of RBCs, which could be converted into the mean corpuscular volume (MCV) and used for diagnosis. Anemia-related diseases caused by abnormal count of RBCs (e.g., erythrocytosis, pernicious anemia) or abnormal RBC size (e.g. megaloblastic anemia, microcytic anemia) could be detected easily and quickly using this electrochemical collision method, potentially leading to extensive applications in hematology and point-of-care blood testing devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A simple and convenient electrochemical method was developed to analyze individual RBCs. </LI> <LI> The number of RBCs was estimated by analyzing collision frequency. </LI> <LI> Abnormal size of RBCs was estimated from the magnitude of staircase current decrease. </LI> </UL> </P>