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    • 1. 发明授权
    • Image signal processing method and image signal processing device
    • 图像信号处理方法及图像信号处理装置
    • US5852648A
    • 1998-12-22
    • US848727
    • 1997-05-22
    • Yoshihiro MiyamotoMasaji Dohi
    • Yoshihiro MiyamotoMasaji Dohi
    • H04N5/14G06T5/00G06T5/40G09G5/36H04N7/18G01N23/04
    • G06T5/40G06T5/009G06T2207/10048G06T2207/10116G06T2207/30021
    • A display signal of high contrast is generated by processing an image signal that is acquired from a camera such as an infra-red or X-ray camera. The method involves: dividing a screen into polygons, finding signal intensities of pixels in these polygons by interpolation from the original image signal intensities of pixels corresponding to the vertices of these polygons as a signal intensity LF of a low frequency component; finding the signal intensities HF of high frequency components of these pixels by performing calculation to subtract the signal LF of this low frequency component from the original image signal S at each pixel; finding, for the signal intensities HF of these high frequency components, from a histogram showing the rate of occurrence numbers of the respective signal intensities, a transformation function IHS including the integrated values of these rate of occurrence numbers up to respective signal intensities; transforming the signal intensities of the high frequency components HF into display signal intensities DHF in accordance with this transformation function IHS; and finding the display signal DP of these pixels by adding to the display signals DHF of these high frequency components obtained by this transformation a signal obtained by multiplying the signal of the low frequency component LF by a weighting coefficient .beta. of less than 1.
    • 通过处理从诸如红外或X射线照相机的相机获取的图像信号来产生高对比度的显示信号。 该方法包括:将屏幕划分成多边形,通过从对应于这些多边形的顶点的像素的原始图像信号强度的内插,作为低频分量的信号强度LF,通过内插求出这些多边形中的像素的信号强度; 通过进行计算,从每个像素处的原始图像信号S中减去该低频分量的信号LF,求出这些像素的高频分量的信号强度HF; 对于这些高频分量的信号强度HF,从表示各信号强度的出现次数的直方图,求出包括这些发生频率的积分值直到各信号强度的变换函数IHS; 根据该变换函数IHS将高频分量HF的信号强度变换为显示信号强度DHF; 并且通过将通过该变换获得的这些高频分量的显示信号DHF加到通过将低频分量LF的信号乘以小于1的加权系数β而获得的信号,来找到这些像素的显示信号DP。
    • 3. 发明授权
    • Image size transformation method for orthogonal transformation coded image
    • 用于正交变换编码图像的图像大小变换方法
    • US06473207B1
    • 2002-10-29
    • US09138557
    • 1998-08-24
    • Yoshihiro Miyamoto
    • Yoshihiro Miyamoto
    • H04N146
    • H04N19/90H04N19/48H04N19/60
    • In an image size transformation method for an orthogonal transformation coded image, orthogonal coefficients as coded data of an image are read out by blocks, after which an operation process for transforming the coefficients on the orthogonal coefficients is carried out. Due to this operation process, coefficients of Y blocks are obtained from coefficients of X blocks, by which the orthogonal coefficients after having the image size enlarged or reduced are outputted. Due to this structure, it is possible to simplify the decoding system. According to the image size transformation method of the present invention, orthogonal transformation coefficients are processed directly on the coefficients by which a transformation of high precision is possible, while there is no possibility that a transformation efficiency will deteriorate because of operation errors caused by inversion or filtering, as in the conventional case.
    • 在用于正交变换编码图像的图像尺寸变换方法中,作为图像的编码数据的正交系数被块读出,之后执行用于变换正交系数的系数的操作处理。 由于该操作过程,从X块的系数获得Y块的系数,由此输出具有放大或缩小图像尺寸的正交系数。 由于这种结构,可以简化解码系统。 根据本发明的图像尺寸变换方法,直接对可以进行高精度变换的系数进行正交变换系数,而由于由反转引起的运算误差,转换效率不会恶化, 过滤,如在常规情况下。
    • 10. 发明申请
    • VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING OR DECODING PROGRAM
    • 视频编码设备,视频解码设备,视频编码方法,视频解码方法,视频编码或解码程序
    • US20100177820A1
    • 2010-07-15
    • US12676207
    • 2008-09-05
    • Keiichi ChonoYoshihiro Miyamoto
    • Keiichi ChonoYoshihiro Miyamoto
    • H04N7/26
    • H04N19/93H04N19/136H04N19/196H04N19/21H04N19/91
    • Intended is to obtain a video encoding device, a video encoding method, and a video encoding program which enable to prevent reduction in compression efficiency caused by drastic changes in symbol occurrence probabilities in context adaptive coding, and a video decoding device, a video decoding method and a decoding program corresponding thereto.The video data 101 is input into video encoding device on a macroblock basis, and after quantization, the PCM determination unit 139 determines whether the coded data 123 is PCM mode or not. Even when the coded data 123 is PCM mode, the context updating unit 301 executes context updating processing so as to improve efficiency of binary arithmetic coding. According to the determination of PCM mode or non PCM mode, the third switch 148 supplies either binary arithmetic coding output or PCM coding output as its output data.
    • 旨在获得能够防止由上下文自适应编码中的符号发生概率剧烈变化引起的压缩效率的降低的视频编码装置,视频编码方法和视频编码程序,视频解码装置,视频解码方法 和与其对应的解码程序。 视频数据101以宏块为基础输入到视频编码装置中,并且在量化之后,PCM确定单元139确定编码数据123是否是PCM模式。 即使当编码数据123是PCM模式时,上下文更新单元301执行上下文更新处理,以提高二进制算术编码的效率。 根据PCM模式或非PCM模式的确定,第三开关148提供二进制算术编码输出或PCM编码输出作为其输出数据。