Unlock instant, AI-driven research and patent intelligence for your innovation.

Image data compression

A technology of image data and data, which is applied in the field of data compression and data decompression, and can solve problems such as lost data

Pending Publication Date: 2021-09-28
IMAGINATION TECH LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these cases, lossy compression techniques can be used, which can achieve a guaranteed compression ratio, but some data may be lost during the compression process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image data compression
  • Image data compression
  • Image data compression

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The following description is given by way of example to enable any person skilled in the art to make and use the invention. The invention is not limited to the embodiments described herein, and various modifications to the disclosed embodiments will be apparent to those skilled in the art. The embodiments are described by way of example only.

[0059] As mentioned above, there is an efficient way to guarantee a fixed compression ratio (e.g., 2:1) without losing too much data quality, e.g., without introducing visually perceptible artifacts into the image due to lossy compression. Lossy compression techniques (and complementary decompression techniques) may be useful. Some previous high-end lossy compression algorithms could achieve a fixed compression ratio without much loss in data quality, but these previous high-end lossy compression algorithms involved performing complex operations on floating-point or fixed-point values ​​(for example, filtering, multiplication, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to image data compression. There is provided a computer-implemented method and a compression unit for performing lossy compression on a block of image data in accordance with a multi-level difference table. The block of image data comprises a plurality of image element values, wherein each level of the multi-level difference table comprises a plurality of entries. An origin value for the block of image data and a level within the multi-level difference table for the block of image data are determined. For each image element value in the block of image data, one of the entries at the determined level within the multi-level difference table is selected, and a compressed block of data for the block of image data is formed, wherein the compressed block of data comprises (i) the data representing the determined origin value, (ii) an indication of the determined level, and (iii) for each image element value in the block of image data, an indication of the selected entry for the image element value.

Description

technical field [0001] The present disclosure relates to data compression and data decompression. Background technique [0002] Data compression, whether lossless or lossy, is desirable in many applications where data is stored in and / or read from memory. By compressing data before storing it in memory, the amount of data transferred to memory can be reduced. An example of data for which data compression is particularly useful is image data. The term "image data" is used herein to refer to two-dimensional data having values ​​corresponding to respective pixel or sample locations of an image. For example, an image may be generated as part of a rendering process on a graphics processing unit (GPU). Image data includes, but is not limited to: depth data to be stored in the depth buffer, pixel data (e.g., color data) to be stored in the frame buffer, texture data to be stored in the texture buffer, and Surface normal data in the surface normal buffer. These buffers may be a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/103H04N19/176H04N19/42
CPCH04N19/103H04N19/176H04N19/42G06T9/00H04N19/423H04N19/124H04N19/146H04N19/182H04N19/50G06T9/004G06T9/005
Inventor 杨喜乐
Owner IMAGINATION TECH LTD