公开(公告)号：US20140169480A1

公开(公告)日：2014-06-19

申请号：US13713742

申请日：2012-12-13

Applicant: QUALCOMM INCORPORATED

Inventor： Vladimir Lachine ,  Chon-Tam Le Dinh ,  Dinh Kha Le ,  Jeffrey Kar Fai Wong

IPC: G06T9/00

CPC classification number: G06T9/00 ,  H04N19/12 ,  H04N19/124 ,  H04N19/14 ,  H04N19/15 ,  H04N19/174 ,  H04N19/176 ,  H04N19/423 ,  H04N19/436 ,  H04N19/46 ,  H04N19/593 ,  H04N19/91

Abstract: Described herein are methods and devices that employ parallel compression of image data using a lossless compressor and a quantization compressor. As described, the lossless compressor generates a variable length compressed bit stream and the quantization compressor generates a fixed length compressed bit stream. The fixed length bit stream is always equal in size to a size requirement of an output memory block. The variable length bit stream may be stored in the output memory block unless it exceeds the memory requirement in size, in which case the fixed length bit stream may be stored to the output memory block.

Abstract translation: 这里描述了使用无损压缩器和量化压缩器对图像数据进行并行压缩的方法和装置。 如上所述，无损压缩器生成可变长度的压缩比特流，量化压缩器生成固定长度的压缩比特流。 固定长度比特流在大小上总是等于输出存储器块的大小要求。 可变长度比特流可以存储在输出存储器块中，除非它超过了大小的存储器要求，在这种情况下，固定长度比特流可以被存储到输出存储器块。

公开(公告)号：US09299166B2

公开(公告)日：2016-03-29

申请号：US13713742

申请日：2012-12-13

Applicant: QUALCOMM Incorporated

Inventor： Vladimir Lachine ,  Chon-Tam Le Dinh ,  Dinh Kha Le ,  Jeffrey Kar Fai Wong

IPC: G06T9/00 ,  H04N19/176 ,  H04N19/46 ,  H04N19/15 ,  H04N19/593 ,  H04N19/12 ,  H04N19/124 ,  H04N19/91 ,  H04N19/14 ,  H04N19/174 ,  H04N19/423 ,  H04N19/436

CPC classification number: G06T9/00 ,  H04N19/12 ,  H04N19/124 ,  H04N19/14 ,  H04N19/15 ,  H04N19/174 ,  H04N19/176 ,  H04N19/423 ,  H04N19/436 ,  H04N19/46 ,  H04N19/593 ,  H04N19/91

Abstract: Described herein are methods and devices that employ parallel compression of image data using a lossless compressor and a quantization compressor. As described, the lossless compressor generates a variable length compressed bit stream and the quantization compressor generates a fixed length compressed bit stream. The fixed length bit stream is always equal in size to a size requirement of an output memory block. The variable length bit stream may be stored in the output memory block unless it exceeds the memory requirement in size, in which case the fixed length bit stream may be stored to the output memory block.

Abstract translation: 这里描述了使用无损压缩器和量化压缩器对图像数据进行并行压缩的方法和装置。 如上所述，无损压缩器生成可变长度的压缩比特流，量化压缩器生成固定长度的压缩比特流。 固定长度比特流在大小上总是等于输出存储器块的大小要求。 可变长度比特流可以存储在输出存储器块中，除非它超过了大小的存储器要求，在这种情况下，固定长度比特流可以被存储到输出存储器块。

公开(公告)号：US20170061580A1

公开(公告)日：2017-03-02

申请号：US15088764

申请日：2016-04-01

Applicant: QUALCOMM Incorporated

Inventor： Daniel Stan ,  Min Li ,  Vladimir Lachine

IPC: G06T3/40 ,  G06K9/56 ,  G06K9/46

CPC classification number: G06T3/4007 ,  G06K9/4647 ,  G06K9/56 ,  G06T3/4015 ,  G06T3/403

Abstract: Rescaling or reconstructing of a digital image may be accomplished by directional interpolation, so that interpolation is done in the direction perpendicular to the gradient—the direction in which the change in pixel values is the smallest. Each pixel is generated by interpolation in the output image as a weighted average of nearby pixels, in which the weighting is done in the direction of the gradient. The interpolation is accomplished with an adaptive filter that has an elliptical frequency response determined by the direction of the gradient. The filter uses filter coefficients that are a function of the direction. Rather than storing coefficients for each of several directions, three filter coefficients are stored—one set for non-directional filter, one for one direction such as 45 degrees, and another for another direction such as 135 degrees. A blending of the filter coefficients is used.

Abstract translation: 数字图像的重新缩放或重建可以通过方向插值来实现，使得在垂直于梯度的方向（像素值的变化最小的方向）上进行插值。 通过在输出图像中的内插生成每个像素作为附近像素的加权平均值，其中在渐变方向上进行加权。 使用具有由梯度方向确定的椭圆频率响应的自适应滤波器来完成内插。 滤波器使用作为方向函数的滤波器系数。 不是存储几个方向中的每一个的系数，而是存储三个滤波器系数，一个用于无方向滤波器，一个针对一个方向，例如45度，另一个用于另一个方向，例如135度。 使用滤波器系数的混合。