| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Color video signal phase detector | US285859 | 1988-12-16 | US4881121A | 1989-11-14 | John L. Judge |
| A method and an electrical circuit determines the phase relationship between the color synchronization burst signal and horizontal synchronization pulses of a single color video signal and the color frame relationship between two color video signals. This is accomplished by regenerating on a line-by-line basis a color subcarrier signal which has a fixed phase relative to the leading edge of a horizontal synchronization pulse. A phase comparison is then made between regenerated color subcarrier signal and the color synchronization burst signal to develop a signal that represents the amount of phase error. The phase error signal is sampled to determine an average phase error for successive lines of the color video signal. Simultaneously, a phase comparison is also made between a 90.degree. phase-displaced version of the color synchronization burst signal and the regenerated color subcarrier signal to provide a quadrature phase error signal. The quadrature phase error signal can be compared to a color video reference signal to determine whether they have the same color frame. Both the video signal and the reference signal have independent timing circuits so that the signals need not be in synchronism to determine a color frame error. The amount of phase error and the existence of color frame mismatch is communicated to a user by means of a visual display monitor. The error is displayed as a separate image from other video images such that the size of the error image increases with an increase in phase error. | ||||||
| 162 | Color video signal phase detector | US17314 | 1987-02-20 | US4792845A | 1988-12-20 | John L. Judge |
| A method and an electrical circuit determines the phase relationship between the color synchronization burst signal and horizontal synchronization pulses of a single color video signal and the color frame relationship between two color video signals. This is accomplished by regenerating on a line-by-line basis a color subcarrier signal which has a fixed phase relative to the leading edge of a horizontal synchronization pulse. A phase comparison is then made between regenerated color subcarrier signal and the color synchronization burst signal to develop a signal that represents the amount of phase error. The phase error signal is sampled to determined an average phase error for successive lines of the color video signal. Simultaneously, a phase comparison is also made between a 90.degree. phase-displaced version of the color synchronization burst signal and the regenerated color subcarrier signal to provide a quadrature phase error signal. The quadrature phase error signal can be compared to a color video reference signal to determine whether they have the same color frame. Both the video signal and the reference signal have independent timing circuits so that the signals need not be in synchronism to determine a color frame error. The amount of phase error and the existence of color frame mismatch is communicated to a user by means of a visual display monitor. The error is displayed as a separate image from other video images such that the size of the error image increases with an increase in phase error. | ||||||
| 163 | 화상부호화장치및화상복호장치 | KR1019980709254 | 1997-10-23 | KR1020000011096A | 2000-02-25 | 세끼구찌,슈운이찌; 아사이,고따로; 무라까미,도꾸미찌; 니시까와,히로후미; 구로다,신이찌; 이스,요시미; 하세가와,유리 |
| PURPOSE: An image encoder and an image decoder are disclosed which perform the image displacement other than parallel displacement on a relatively small scale and with which the processing time can be reduced and estimation with a high precision is enabled. CONSTITUTION: The constitution for compression-coding the input image comprises a movement compensating unit(9) which detects the frame-to-frame movement of the blocks into which the input image is divided. The constitution further comprises a movement detection unit(9) which includes a deformed block matching section which deforms only integer pixels, i.e. real sampling points present in a partial region corresponding to a reference image for movement detection into predetermined formats, cuts the deformed pixels out, and compares the cut-out deformed pixels with the integer pixels of the blocks of the input image and which outputs a moving vector which gives a minimum error extracted by the coordinate designation and a movement compensation unit which includes a corresponding point determination section which includes the deformed block matching section, correlates the blocks of the reference image in accordance with movement parameters obtained from comparison output, designates the coordinates, deforms and determines the block, and which outputs a predicted partial image. Further, an image decoder is so constructed as to correspond to the construction of the encoder. Moreover, the image decoder calculates the coordinates with a plurality of movement vectors by using also the coordinate values of the half-pixels of the reference image in a movement compensating unit and subjects the obtained pixel values to a deformation processing by using a deformation pattern in accordance with a deformed pattern. | ||||||
| 164 | Digital video signal encoder and encoding method | US780780 | 1997-01-09 | US6005626A | 1999-12-21 | Wei Ding |
| Motion vectors and associated errors which are determined in the course of encoding a video signal are used to determine whether respective macroblocks of two or more frames represent the same subject matter albeit displaced by motion represented by the frames. The motion vector errors are compared to a predetermined motion threshold. If a particular motion vector error is less than the motion threshold, the macroblocks corresponding to the motion vector error are determined to represent substantially identical subject matter and the corresponding motion vector represents displacement of the subject matter between the frames due to motion of the subject matter. Accordingly, differences between the macroblocks corresponding to the motion vector error are determined to be due primarily to noise and not to differences in the subject. Therefore, a relatively heavy temporal filter is applied between the macroblocks. Conversely, if a particular motion vector error is not less than the motion threshold, the macroblocks corresponding to the motion vector error are determined to represent different subject matter and only a spatial filter is applied to either macroblock. The spatial filter is applied relatively lightly to reduce noise while minimizing signal loss, e.g., blurring, resulting from the filtering. The motion threshold is set according to the noise variance of the video signal which is being encoded. The noise variance of the video signal can be measured using the video signal acquisition equipment used to acquire the video signal, e.g., a video camera, or can be estimated from the video signal itself. | ||||||
| 165 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING PROGRAM, STORAGE MEDIUM, AND ULTRASONIC DIAGNOSTIC APPARATUS | EP08722676.7 | 2008-03-24 | EP2226012A1 | 2010-09-08 | YOKOTA, Yasunari; TANIGUCHI, Rie; KAWAMURA, Yoko; NOGATA, Fumio |
A computer 12 of an image processing apparatus 11 acquires a moving image including a minor axis cross section of a carotid artery and a cross section of surrounding tissues around the carotid artery and estimates, from images of two temporally different frames of the acquired moving image, an optical flow of each point included in an area corresponding to a carotid artery wall and an optical flow of each point included in an area corresponding to the surrounding tissues. Based on the estimated optical flow of each point, the computer 12 calculates an amount of displacement of the carotid artery and the surrounding tissues with respect to a radial direction of the carotid artery depending on a change in internal pressure of the carotid artery. The computer 12 also calculates an amount of displacement of the carotid artery and the surrounding tissues with respect to the radial direction of the carotid artery depending on a change in the internal pressure of the carotid artery based on a theoretical expression obtained by modeling the carotid artery and the surrounding tissues with a two-layer cylinder. The computer 12 calculates the elastic modulus of the carotid artery wall and the elastic modulus of the surrounding tissues so as to minimize a square error between the two calculated amounts of displacement. |
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| 166 | 変位計測装置、並びに、超音波診断装置 | JP2014243937 | 2014-12-02 | JP2015042344A | 2015-03-05 | SUMI CHIKAYOSHI |
| 【課題】ビームフォーミングに時間を要さずに1つのエコーデータフレームを生成する間の組織変位による誤差を最小限にとどめることのできるビームフォーミング法に基づいて、実時間の高精度な変位ベクトル計測を実現する。【解決手段】変位計測装置は、軸方向及び横方向の直交軸を含む直交座標系において超音波ビームで計測対象物を走査して得られる超音波エコーデータに基づいて、複数の時相の各々において超音波エコーデータフレームを生成する駆動・処理手段と、軸方向及び横方向のキャリア周波数及び位相、又は、単一八象限スペクトル、単一四象限スペクトル、及び、単一半帯域のスペクトルの内の1つに関して、複数の時相において生成された超音波エコーデータについて各位置において得られる連立方程式を解くことにより、軸方向及び横方向の各位置における変位ベクトル成分を算出するデータ処理部とを含む。【選択図】図1 | ||||||
| 167 | Method and apparatus for determining true motion vectors for selected pixels | US446351 | 1995-05-22 | US5581308A | 1996-12-03 | Min-Sub Lee |
| An inventive apparatus determines true motion vectors between a current and its previous frames for feature points selected from the previous frame wherein a selected feature point is surrounded by its neighboring four feature points to form a previous rhombus having a set of four triangles based on the selected feature point. A motion vector displacement generator gives a predetermined N number of displacements to an initial motion vector for its corresponding feature points to thereby produce a subset of N candidate motion vectors and a motion prediction block provides a current rhombus corresponding to the previous rhombus by the initial motion vectors, wherein the current rhombus has N sets of four triangles due to the N candidate motion vectors. A true motion vector is selected from the subset of N candidate motion vectors, which entails a minimum error value between the predicted pixel values for each triangle set in the current rhombus and their respective corresponding current pixel values from the previous frame. | ||||||
| 168 | Method and device for displacement measurement, and ultrasonic diagnostic apparatus | JP2010144921 | 2010-06-25 | JP2011078744A | 2011-04-21 | SUMI CHIKAYOSHI |
| <P>PROBLEM TO BE SOLVED: To attain real-time high precision displacement vector measurement based on a beam forming method that minimizes errors arising from the system displacement taking place while generating an echo data frame without taking much time for beam forming. <P>SOLUTION: The displacement measurement method takes an optional 3D orthogonal triple-axis coordinate system, where the nearly vertical direction of a measured object crosses its lateral direction at nearly right angles, and further its elevation direction crosses these two directions at nearly right angles, generates electronically and/or mechanically an ultrasonic steering beam having a deflected angle, and includes the step (a) to generate ultrasonic echo data frames by scanning the measured object by the steering beam in the lateral axis direction, and the step (b) to calculate displacement vector distributions by applying the prescribed block matching between the ultrasonic echo data frames generated at two or more different time phases. <P>COPYRIGHT: (C)2011,JPO&INPIT | ||||||
| 169 | System and method for super-resolution imaging from a sequence of color filter array (CFA) low-resolution images | US12973667 | 2010-12-20 | US08666196B2 | 2014-03-04 | Shiqiong Susan Young |
| A method and system for improving picture quality of color images by combing the content of a plurality of frames of the same subject; comprising: at least one processor; the at least one processor comprising a memory for storing a plurality of frames of a subject; the at least one processor operating to combine the content of plurality of frames of the subject into a combined color image by performing: a process in which at least two multicolored frames are converted to monochromatic predetermined color frames; a gross shift process in which the gross shift translation of one monochromatic predetermined color frame is determined relative to a reference monochromatic predetermined color frame; a subpixel shift process utilizing a correlation method to determine the translational and/or rotational differences of one monochromatic predetermined color frame to the reference monochromatic predetermined color frame to estimate sub-pixel shifts and/or rotations between the frames; and an error reduction process to determine whether the resolution of the resulting combined color image is of sufficient resolution; the error reduction process comprising applying at least one spatial frequency domain constraint and at least one spatial domain constraint to the combined color image to produce at least one high-resolution full color image. | ||||||
| 170 | System and Method for Super-Resolution Imaging from a Sequence of Color Filter Array (CFA) Low-Resolution Images | US12973667 | 2010-12-20 | US20110150331A1 | 2011-06-23 | SHIQIONG SUSAN YOUNG |
| A method and system for improving picture quality of color images by combing the content of a plurality of frames of the same subject; comprising: at least one processor; the at least one processor comprising a memory for storing a plurality of frames of a subject; the at least one processor operating to combine the content of plurality of frames of the subject into a combined color image by performing: a process in which at least two multicolored frames are converted to monochromatic predetermined color frames; a gross shift process in which the gross shift translation of one monochromatic predetermined color frame is determined relative to a reference monochromatic predetermined color frame; a subpixel shift process utilizing a correlation method to determine the translational and/or rotational differences of one monochromatic predetermined color frame to the reference monochromatic predetermined color frame to estimate sub-pixel shifts and/or rotations between the frames; and an error reduction process to determine whether the resolution of the resulting combined color image is of sufficient resolution; the error reduction process comprising applying at least one spatial frequency domain constraint and at least one spatial domain constraint to the combined color image to produce at least one high-resolution full color image. | ||||||
| 171 | System and method for super-resolution imaging from a sequence of color filter array (CFA) low-resolution images | US12968881 | 2010-12-15 | US08577184B2 | 2013-11-05 | Shiqiong Susan Young |
| A method and system for improving picture quality of color images by combing the content of a plurality of frames of the same subject; comprising: at least one processor; the at least one processor comprising a memory for storing a plurality of frames of a subject; the at least one processor operating to combine the content of plurality of frames of the subject into a combined color image by performing: a process in which at least two multicolored frames are converted to monochromatic predetermined color frames; a gross shift process in which the gross shift translation of one monochromatic predetermined color frame is determined relative to a reference monochromatic predetermined color frame; a subpixel shift process utilizing a correlation method to determine the translational and/or rotational differences of one monochromatic predetermined color frame to the reference monochromatic predetermined color frame to estimate sub-pixel shifts and/or rotations between the frames; and an error reduction process to determine whether the resolution of the resulting combined color image is of sufficient resolution; the error reduction process comprising applying at least one spatial frequency domain constraint and at least one spatial domain constraint to the combined color image to produce at least one high-resolution full color image. | ||||||
| 172 | Source encoding method for image | JP3382495 | 1995-02-22 | JPH07264595A | 1995-10-13 | FUIRITSUPU HAISURAA; SHIYUTEFUAN GOSU |
| PURPOSE: To improve picture quality by dividing an image area into a foreground and a background and giving the image area of the foreground priority to the image area of the background when the image area of the foreground is encoded. CONSTITUTION: A motion estimation unit 1 of an image source encoder minimizes the reference value of te mean square error of image areas at various positions in a specific window of a predicted image based on a moving image and a predected image fild in a predicting memory 7. Consequently, one displacement vector is generated for every image unit. When the displacement vector found by the unit 1 is smaller than a specific threshold value, it is considered that this image unit belongs to the background and inter-frame encoding is performed through a predictive vector encoder 10, an outline encoder 11, and entropy encoders 14 and 15. When the displacement vector is larger than the threshold value, on the other hand, in-frame encoding is performed preferentially through a discrete cosine converter DCT2 and an entropy encoder 12. | ||||||
| 173 | Delay time difference compensation system in bit by bit comparator for multiplexing device | JP12228287 | 1987-05-19 | JPS63287129A | 1988-11-24 | IKAWA FUMIHIRO |
| PURPOSE: To speed up delay time compensation by using a pulse representing a frame position in addition to a low-order group data of an active line and a monitoring system so as to apply bit by bit comparison, thereby discriminating the normal operation of the active line. CONSTITUTION: An elastic memory 21 attracts a destuff jitter of a low-order group signal 2 of a monitoring system. A shift register 22 receives a low-order group data 1 of the active line to be interlocked with the shift register 23. The register 23 uses a frame pulse phase comparison section 26 to match the phase of a frame reference pulse 4 of a monitoring system demultiplexer compared with the phase by a frame pulse phase comparison section 26. The shift register 24 shifts bit by bit each every time the result of comparison of the comparison section 25 is in error. The comparison section 25 compares the low-order group signal 1 of the active line with the low-order group signal 2 of the monitoring system by one bit end. Thus, the normal operation of the active line is discriminated and the time for the delay time compensation is reduced. COPYRIGHT: (C)1988,JPO&Japio | ||||||
| 174 | Motion vector estimation method and apparatus for use in an image signal encoding system | US507579 | 1995-07-26 | US5668608A | 1997-09-16 | Min-Sup Lee |
| An inventive apparatus estimates correct motion vectors between a current and its previous frames for feature points selected from the previous frame. A motion vector detector first determines a set of initial motion vectors for the feature points. Subsequently, a displacement generator provides N number of displacements to an initial motion vector of a selected feature point to thereby produce a set of N candidate motion vectors for the selected feature point, wherein the selected feature point is surrounded by its, e.g., six neighboring feature points to form a previous hexagon having a set of six triangles. And then, a predictor provides quasi-feature points in the current frame from the neighboring feature points through the use of the initial motion vectors thereof; and also generates a set of N selected quasi-feature points from the selected feature point by using the N candidate motion vectors. And a weight factor generator selectively generates one from a multiplicity of weigh factors based on position data of each of the pixels in the current hexagon and each of the N subject quasi-feature points. Finally, a motion vector selector selects a motion vector from the N candidate motion vectors corresponding to a set of six triangles in the current hexagon which yields a minimum error value among N error values obtained through the use of the weight factors between the current and the previous hexagons. | ||||||
| 175 | Adaptive multi-modal motion estimation for video compression | US09518429 | 2000-03-03 | US06594397B1 | 2003-07-15 | Shane Ching-Feng Hu |
| An adaptive multi-modal motion estimation algorithm for video compression builds a luminance pyramid for each image of a moving image sequence. From the top level image of the luminance pyramid a global motion vector is determined between images at times t and t+n. The global motion vector is used as a pivot point and to define a search area. For each block of a current top level image a search for a match is carried out around the pivot point within the search area. The resulting block motion vectors serve as initial conditions for the next higher resolution level. A refinement process results in a displaced frame difference value (DFD) for each block as an error measure. If the error measure is small, the motion vector is chosen as the motion vector for the current block. If the error measure is large, then a search within the search area around a zero motion pivot point is conducted. The motion vector that results in the smallest error measure is chosen as the motion vector for the current block. The refinement and zero pivot searches are repeated for each level down to the full resolution base of the pyramid, resulting in the desired estimated motion vectors for the image. | ||||||
| 176 | Motion vector selection in a video motion estimator based on a preferred reference point | EP03026177.0 | 2003-11-17 | EP1420595A1 | 2004-05-19 | Tee, Swee-San; Phong, Kah-ho; Bard, Jean-Michel; Hui, Lucas Y. W. |
A method of selecting a motion vector for use in a motion estimation system is disclosed. The motion vector defines movement of a block of pixels between a search window and a reference frame. The method includes the steps of scanning a search window in a fixed order for a suitable match with an area of the reference frame such that each search position within a current row or column of the window is one pixel away from a previous search position, defining a preferred point in the search window, calculating a primary norm function with reference to the preferred point for a given position in each row or column, calculating a norm function for each search position based on a linear increment of the primary norm function for the respective row or column, calculating an Absolute Error (AE) for each search position, based on a difference between a given property of the search position and a position in the reference window, and selecting a motion vector, the displacement of the motion vector being defined in terms of the search position having the smallest AE and the smallest norm function. Apparatus for performing the method is also disclosed. |
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| 177 | Bandwidth reduction system for television | EP89306280.2 | 1989-06-22 | EP0348186A2 | 1989-12-27 | Thomas Graham A. |
An HDTV picture is transmitted in a 625/50 MAC channel using bandwidth reduction techniques. In an 80ms coding branch motion compensation is provided by generating motion vectors for each block of the picture. The motion estimation is performed on a downfiltered and subsampled signal, and peaks in the phase correlation surface are estimated by an inverted-V interpolator function. Vectors are assigned to the blocks by determining the assignment error over both a field period and a frame period and summing the two. A "menu" of eight vectors is available for each block. To assist compatibility, samples are repositioned before transmission by calculating the average motion per field for each block, rounding the resultant to the nearest even number of pixels and picture lines per field period, and displacing the samples in dependence upon the resultant displacement value and upon the field number from which the sample is derived. Furthermore, a filter is selectively included to provide an attenuating dip centred on 12.5 Hz. |
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| 178 | Method and device for measuring eyeglass frame, and eyeglass lens grinding device provided therewith | JP22080797 | 1997-07-31 | JPH1148114A | 1999-02-23 | MIZUNO TOSHIAKI |
| PROBLEM TO BE SOLVED: To attempt to improve precision of coaxiality when manufacturing eyeglasses, by inputting respective frame data of eyeglasses frame consisting both frames, and reversing one input frame data into the other frame data, then calculating displacement in the rotational direction of the former frame data against the other frame data. SOLUTION: First, instrumental data (lens shape data) of frame shape of right-and-left frames of an eyeglasses is obtained by eyeglass frame shape measuring part. Here, the lens shape data using as the base of the processing is based on the right lens shape data, and the mirror reversed data of it is used as the left lens shape data. Then, the mirror reversed data is rotated around the boxing center DF by a minute degree of the angle, and this rotational operation is performed clockwise and counterclockwise in the prescribed range, then the amount of rotation at the time that its average error gets to a minimum is obtained. This amount of rotation is defined as a coaxiality correcting angle ψat the time of the processing, and it is stored in a trace data memory and processed. Thus, precision of the coaxiality of the lens can be improved when manufacturing the eyeglasses. | ||||||
| 179 | Real-time shape measuring method and device by ccd camera through use of dmd | JP2001026564 | 2001-02-02 | JP2002228425A | 2002-08-14 | MORIMOTO YOSHIHARU; FUJIGAKI MOTOHARU |
| PROBLEM TO BE SOLVED: To provide a CCD camera for measuring a real-time shape capable of obtaining an contour line image or an equal displacement line image with small errors by a phase-shift scanning moire method even in the case that an object moves. SOLUTION: The image of the object is once formed in a DMD surface, and the image formed in the DMD surface is further passed through a lens to form an image in a CCD surface. In the case of photographing the contour line image, a lattice is projected to the sample object while the lattice is phase- shifted, and photographing is performed while the ON/OFF of each mirror of the DMD is controlled according to the amount of phase-shift of the projection lattice during the photographing of one frame by the CCD. In the case of photographing the equal displacement line image, the lattice is projected to the sample object while the lattice is phase-shifted, and photographing is performed while pixels to be turned on and off of each mirror of the DMD are controlled according to the amount of the phase shift of the projection lattice during the photographing of one frame by the CCD on the basis of a previously obtained phase distribution prior to deformation of the object. COPYRIGHT: (C)2002,JPO | ||||||
| 180 | Method and device for detecting overlapped video field and picture encoder | JP25762596 | 1996-09-06 | JPH09130812A | 1997-05-16 | MAIKERU JIEI SUMOORENSUKII |
| PROBLEM TO BE SOLVED: To correctly detect a field assigned by overlapping in a video signal given the frame rate conversion such as a 3:2 pull down system. SOLUTION: This device is provided with a motion evaluation unit 104 comparing respective two pictures to be compared with plural blocks within adjacent field on a time base to determine the displacement error value of each block to obtain a motion vector of the block. The device is also provided with a vector comparing unit 105 judging the correlation of the motion vectors in each corresponding block between the two field pictures and in the case when a smallest displacing error value is smaller than a prescribed value, determining that the two field are overlapped. Thus the overlapped field is easily discriminated through the use of the result of moving vector detection by means of an MPEG encoder. | ||||||
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