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    • 32. 发明授权
    • Encoding image data
    • 编码图像数据
    • US5255105A
    • 1993-10-19
    • US051571
    • 1993-04-22
    • Mark A. IretonCostas S. Xydeas
    • Mark A. IretonCostas S. Xydeas
    • G06T9/00H04N1/417H04N1/41
    • G06T9/004H04N1/4172
    • A method is described for encoding a first image to produce a second, lower resolution image. For each superpixel group in the first image, a prediction class is formed, based on the values of the pixels in two adjacent superpixels. This prediction class is used to access a table, to obtain a prediction for the corresponding pixel in the second image. If the prediction matches the actual pixel pattern of the superpixel, the corresponding pixel in the second image is set to the predicted colour. If the prediction does not match, then the corresponding pixel in the second image is set to the inverse of the predicted colour, and the actual pixel pattern is stored in a supplementary file. If no prediction is provided, the actual pixel pattern is stored, and the pixel in the second image is set to the colour of the majority of the pixels in the superpixel. The result is a compressed, low-resolution image, along with a supplementary file containing the information necessary to reconstruct the high-resolution image from the low-resolution image. The method may be applied repeatedly so as to form a series of images of progressively lower resolution.
    • 描述了一种用于编码第一图像以产生第二较低分辨率图像的方法。 对于第一图像中的每个超像素组,基于两个相邻超像素中的像素的值形成预测类。 该预测类用于访问表,以获得第二图像中的对应像素的预测。 如果预测与超像素的实际像素图案相匹配,则将第二图像中的相应像素设置为预测颜色。 如果预测不匹配,则将第二图像中的相应像素设置为预测颜色的倒数,并将实际像素图案存储在补充文件中。 如果没有提供预测,则存储实际的像素图案,并且将第二图像中的像素设置为超像素中的大部分像素的颜色。 结果是压缩的低分辨率图像,以及包含从低分辨率图像重建高分辨率图像所需的信息的补充文件。 可以重复地应用该方法,以便形成逐渐降低的分辨率的一系列图像。
    • 35. 发明授权
    • Motion image data compression system
    • 运动图像数据压缩系统
    • US5157742A
    • 1992-10-20
    • US661861
    • 1991-02-27
    • Takami Niihara
    • Takami Niihara
    • H04N19/50G06T7/20G06T9/00H03M7/30H04N1/415H04N1/417H04N7/01H04N11/04H04N19/114H04N19/136H04N19/176H04N19/196H04N19/423H04N19/46H04N19/503H04N19/51H04N19/523H04N19/577H04N19/59H04N19/70H04N19/85
    • G06T7/2013H04N19/51H04N19/523H04N19/577H04N7/014
    • A motion data image compression system comprises a first element to divide an I'th frame (I=1, 2, . . . N-1) between the two frames F.sub.O and F.sub.N out of N frames (where N is an integer of 2 or more) of digital motion image data, into a block B.sub.I formed of a plural number of pixels, and to determine the motion vector MVOI of frames F.sub.O and F.sub.I for each of the divided blocks B.sub.I and to determine the block B.sub.O that uses the motion vector MVOI to predict the block B.sub.I, a second element to determine the motion vector MVNI between frame F.sub.N and F.sub.I for each block B.sub.I and that uses the motion vector MVNI to determine the block B.sub.N that predicts the block B.sub.I, a third element that determines the motion vectors MVON and MVNO of frame F.sub.N and F.sub.O for each block B.sub.I, and uses the motion vectors MVON and MVNO to determine the predictive motion vector MVOI' between frame F.sub.O and F.sub.I, determine the block B.sub.O, that predicts the block B.sub.I, determine the predictive motion vector MVNI' between frames F.sub.N and F.sub.I, and that uses the predictive motion vector MVNI' to determine the block B.sub.N, that predicts block B.sub.I and the block B.sub.ON, that is the linear sum of blocks B.sub.O, and B.sub.N', a fourth element that determines the block B.sub.DC from the average value of block B.sub.I, and a fifth element that selects the block out of the blocks B.sub.O, B.sub.N, B.sub.ON, and B.sub.DC for which the correlation with block B.sub.I is greatest.
    • 运动数据图像压缩系统包括:第一单元(21,24),用于将N帧中的两帧F0和FN之间的第I帧(I = 1,2,... N-1)分配(其中N 是2以上的整数)数字运动图像数据转换成由多个像素形成的块BI,并且为每个分割块BI确定帧F0和FI的运动矢量MV0I,并且确定块 B0,其使用运动矢量MV0I来预测块BI;第二元素(22,25),用于为每个块BI确定帧FN和FI之间的运动矢量MVNI,并且使用运动矢量MVNI来确定预测的块BN 块BI,为每个块BI确定帧FN和F0的运动矢量MV0N和MVN0的第三元素(53,54,55,56,57,58,59),并且使用运动矢量MV0N和MVN0来确定 帧F0和FI之间的预测运动矢量MV0I min确定预测块BI的块B0 min,确定预测电路 帧FN和FI之间的离子矢量MVNI min,并且使用预测运动矢量MVNI min来确定预测块BI的块BN min和块B 0 min和BN min的线性和的块B0N min,第四个元素 (45),其从块BI的平均值确定块BDC;以及第五元素(46),其从与块Bi的相关性最大的块B0,BN,B0N和BDC中选择块。
    • 40. 发明授权
    • Method for encoding and decoding a digital image
    • 数字图像编码和解码方法
    • US4888645A
    • 1989-12-19
    • US111957
    • 1987-10-21
    • Joan L. MitchellKaren L. AndersonGerald Geortzel
    • Joan L. MitchellKaren L. AndersonGerald Geortzel
    • G06T9/00H04N1/417
    • H04N1/4175G06T9/005
    • A method for encoding and decoding digital image data, includes the steps of: testing the data for a vertical relationship between adjacent lines of the image; generating directly a reference code word representative of the vertical relationship for each successful test; generating by table lookup a run code word for a stream of data bits of common value for each unsuccessful test whereby a data element representing a number of bits in a code word is stored at a predetermined offset from a table entry for the code word; merging the vertical reference code words and the run code words generated by the above steps to form an encoded data stream; testing the encoded data stream for a reference code; decoding directly the vertical relationship from the reference code for each successful test; decoding by table lookup a run of bits of common value by serial examination of said encoded data stream for each unsuccessful test; and storing data decoded by the above steps in a predetermined relationship. A fast algorithm for modifying an image in run representation form before encoding or after decoding is also described.
    • 一种用于对数字图像数据进行编码和解码的方法,包括以下步骤:测试图像的相邻行之间的垂直关系的数据; 直接生成代表每个成功测试的垂直关系的参考代码字; 通过表查找生成用于每个不成功测试的公共值数据位流的运行代码字,由此表示码字中的位数的数据元素以与代码字的表项相对应的预定偏移量被存储; 合并垂直参考码字和通过上述步骤生成的游程码字以形成编码数据流; 测试编码数据流的参考代码; 从每个成功测试的参考代码直接解码垂直关系; 通过针对每个不成功测试对所述编码数据流进行串行检查,通过表查找解码通用值的位; 并以预定关系存储通过上述步骤解码的数据。 还描述了用于在编码之前或解码之后以运行表示形式修改图像的快速算法。