A method and device for modifying a partial image of a jpeg image

A local image and image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as long processing time, user experience impact, and few configurations, and achieve the effect of reducing the amount of subsequent calculations

Active Publication Date: 2017-01-18
THUNDERSOFT
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the computing performance of mobile terminals, the process lasts for several seconds, and the long processing time has a fatal impact on user experience
Therefore, the camera software in existing mobile smart terminals is rarely equipped with this function

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
  • A method and device for modifying a partial image of a jpeg image
  • A method and device for modifying a partial image of a jpeg image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] A method for modifying a partial image of a JPEG image provided by the present invention will be described in detail below in conjunction with the accompanying drawings, taking a mobile phone as an example. A kind of method of modifying JPEG image partial image provided by the invention comprises the following steps:

[0032] Step 101: Obtain quantized DCT data using Huffman decoding

[0033] JPEG is a compressed image format that uses Huffman coding for compression and cannot be directly modified. Therefore, in order to modify a JPEG image, it must first be decoded. Huffman coding (Huffman Coding) is a coding method, which is a kind of variable word length coding (VLC). This method constructs the codeword with the shortest average length of different prefixes according to the probability of data occurrence, sometimes called Best coding. Huffman coding first scans the image data, calculates the probability of occurrence of various pixels, and specifies unique code wo...

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 invention provides a method and a device for modifying local images of a JPEG (joint photographic experts group) image. The method optimizes conventional procedures like decoding, modifying and recoding, and data quantity needing to be decoded, modified and recoded when the local images of the JPEG image are modified is substantially reduced, so that efficiency of locally modifying the image is greatly improved. Promotion on performance of locally modifying the image enables picture-taking in a mobile terminal and processing of time stamps and the like at the same time to be possible.

Description

technical field [0001] The invention relates to the field of electronic image processing, in particular to a method and device for modifying a partial image of a JPEG image. Background technique [0002] With the rapid development of mobile terminals (mobile phones, tablet computers, PDAs, etc.), the performance of their cameras is getting stronger and stronger, and it is becoming more and more common for people to use mobile terminals to take pictures. Time stamping of captured photos is a commonly used technique in traditional cameras. However, in a mobile smart terminal, if this function is to be realized, the JPEG image captured by the camera needs to be decompressed into an RGB image, and then modified. Limited by the computing performance of mobile terminals, this process lasts for several seconds, and the long processing time has a fatal impact on user experience. Therefore, the camera software in existing mobile smart terminals is rarely equipped with this function...

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 Patents(China)
IPC IPC(8): H04N19/625H04N19/124H04N19/186H04N19/13H04N19/44
Inventor 邓必山李志杰
Owner THUNDERSOFT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap