Region-based image decompression

Patent metadata

Field	Value
Publication number	US-9848192-B2
Application number	US-201514683279-A
Country	US
Kind code	B2
Filing date	Apr 10, 2015
Priority date	Oct 14, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method and a non-transitory computer readable medium for decompressing an image including one or more regions are presented. A region of the image is selected to be decoded. The region and metadata associated with the region are decoded, the metadata including transformation and quantization settings used to compress the region. A reconstruction transformation is applied to the region using the transformation and quantization settings.

First claim

What is claimed is:

1. A method for decompressing an image, the image including one or more regions, the method comprising:
selecting a region of the one or more regions in the image to decode, wherein each region is compressed independently when a predetermined compression acceptability criteria is reached and downscaled during encoding;
decoding the selected region using metadata associated with the selected region, wherein the metadata includes transformation and quantization settings and information describing an aspect ratio used to compress the region;
applying a reconstruction transformation to the selected region using the transformation and quantization settings and performing an upscaling operation on the selected region using the aspect ratio; and
applying the reconstruction transformation to each of the one or more regions in the image and performing the upscaling operation to each of the one or more regions in the image prior to displaying the image.

2. The method of claim 1 , wherein the image includes multiple regions and each region has a fixed size and shape.

3. The method of claim 1 , wherein the image includes multiple regions and each region has a variable size and shape.

4. A non-transitory computer-readable storage medium storing a set of instructions for execution by a general purpose computer to decompress an image, the image including one or more regions, the set of instructions comprising:
a selecting code segment for selecting a region of the one or more regions in the image to decode, wherein each region is compressed independently when a predetermined compression acceptability criteria is reached and downscaled during encoding;
a decoding code segment for decoding the selected region and metadata associated with the selected region, wherein the metadata includes transformation and quantization settings and information describing an aspect ratio used to compress the region;
an applying code segment for applying a reconstruction transformation to the selected region using the transformation and quantization settings and performing an upscaling operation on the selected region using the aspect ratio, and applying the reconstruction transformation to each of the one or more regions in the image and performing the upscaling operation to each of the one or more regions in the image prior to displaying the image.

5. The non-transitory computer-readable storage medium of claim 4 , wherein the image includes multiple regions and each region has a fixed size and shape.

6. The non-transitory computer-readable storage medium of claim 4 , wherein the image includes multiple regions and each region has a variable size and shape.

7. The non-transitory computer-readable storage medium according to claim 4 , wherein the instructions are hardware description language (HDL) instructions used for the manufacture of a device.

8. A method for decompressing an image, the image including one or more regions, each region including one or more subregions, the method comprising:
selecting a region of the one or more regions in the image to decode, wherein each region is compressed independently when a predetermined compression acceptability criteria is reached and downscaled during encoding;
selecting a subregion of the region to decode;
decoding the selected subregion using metadata associated with the selected region, wherein the metadata includes transformation and quantization settings and information describing an aspect ratio used to compress the subregion;
applying a reconstruction transformation to the selected subregion using the transformation and quantization settings and performing an upscaling operation on the selected subregion using the aspect ratio, wherein the applied reconstruction transformation depends on the selected subregion and the reconstruction transformation is applied independently to each subregion; and
applying the reconstruction transformation to each of the one or more subregions in the image and performing the upscaling operation to each of the one or more subregions in the image prior to displaying the image.

9. The method of claim 8 , wherein the image includes multiple regions and each region has a fixed size and shape.

10. The method of claim 8 , wherein the image includes multiple regions and each region has a variable size and shape.

11. A non-transitory computer-readable storage medium storing a set of instructions for execution by a general purpose computer to decompress an image, the image including one or more regions, each region including one or more subregions, the set of instructions comprising:
a first selecting code segment for selecting a region of the one or more regions in the image to decode, wherein each region is compressed independently when a predetermined compression acceptability criteria is reached and downscaled during encoding;
a second selecting code segment for selecting a subregion of the region to decode;
a decoding code segment for decoding the selected subregion and metadata associated with the selected subregion, wherein the metadata includes transformation and quantization settings and information describing an aspect ratio used to compress the subregion;
an applying code segment for applying a reconstruction transformation to the selected subregion using the transformation and quantization settings and performing an upscaling operation on the selected subregion using the aspect ratio, wherein the applied reconstruction transformation depends on the selected subregion, and the reconstruction transformation is applied independently to each subregion, and applying the reconstruction transformation to each of the one or more subregions in the image and performing the upscaling operation to each of the one or more subregions in the image prior to displaying the image.

12. The non-transitory computer-readable storage medium of claim 11 , wherein the image includes multiple regions and each region has a fixed size and shape.

13. The non-transitory computer-readable storage medium of claim 11 , wherein the image includes multiple regions and each region has a variable size and shape.

14. The non-transitory computer-readable storage medium according to claim 11 , wherein the instructions are hardware description language (HDL) instructions used for the manufacture of a device.

Assignees

• Advanced Micro Devices Inc

Inventors

• Pomianowski Andrew S
• Iourcha Konstantine

Classifications

• H04N19/196

  being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters (processing of motion vectors H04N19/513) · CPC title

• H04N19/17

  the unit being an image region, e.g. an object · CPC title

• H04N19/119

  Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks · CPC title

• H04N19/46

  Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) · CPC title

• H04N19/122

  Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type · CPC title