Method and apparatus for coding images and method and apparatus for decoding the images

A technology for image coding and camera devices, which is applied in the field of image decoding methods and devices, and can solve problems such as increased computation

Inactive Publication Date: 2006-01-04
SANYO ELECTRIC CO LTD
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned patent document 2, since the above-mentioned processing is performed on the transformation coefficients in the sub-bands other than the LL sub-band, the amount of calculation is greatly increased
Also, it is difficult to make differences in image quality within an image, to the extent that a certain object stands out

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
  • Method and apparatus for coding images and method and apparatus for decoding the images
  • Method and apparatus for coding images and method and apparatus for decoding the images
  • Method and apparatus for coding images and method and apparatus for decoding the images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1 Embodiment 1

[0059] figure 1 It is a configuration diagram of the image coding device 100 according to the first example of the first embodiment. The configuration of the image coding device 100 can be realized by CPU, memory, or other LSI of any computer in terms of hardware, and can be realized by a program having a coding function loaded in the memory in terms of software, but what is described here is based on these The function blocks realized by the collaboration. Therefore, these functional blocks may be realized in various forms by only hardware, only software, or a combination of these, as will be understood by those skilled in the art.

[0060] The image encoding device 100 compresses and encodes an input original image using the JPEG2000 method as an example. The original image input to the image encoding device 200 is a frame of a moving image. The image encoding device 100 can continuously encode each frame of a moving image in JPEG to generate an encoded stream of moving i...

Embodiment 2

[0095] Image 6 It is a configuration diagram of the image coding device 200 according to the second example of the first embodiment. The image coding device 200 is configured by adding the image quality setting unit 22 to the image coding device 100 according to the first example of the first embodiment. The same symbols are assigned to the same configurations as in Example 1 of Embodiment 1, and configurations and actions different from those in Example 1 of Embodiment 1 will be described.

[0096] The initial value of the image quality of the ROI area and the non-ROI area can be set by the user in the ROI setting unit 20 . In addition, the image quality setting unit 22 may automatically determine the image quality of the non-ROI region by calculation or analogy based on the code amount assigned to each frame. That is, if the code amount of the ROI area increases, the code amount of the non-ROI area is reduced; if the code amount of the ROI area decreases, the code amount ...

Embodiment 3

[0100] Figure 7It is a configuration diagram of the image encoding device 300 according to the third example of the first embodiment. This image coding device 300 is configured by adding the frame buffer 24 and the object extraction unit 26 to the image coding device 100 according to the example of the first embodiment. The same symbols are assigned to the same configurations as in Example 1 of Embodiment 1, and configurations and actions different from those in Example 1 of Embodiment 1 will be described. In addition, it demonstrates also about the different activity of the same structure.

[0101] The frame buffer 24 is a large-capacity memory such as SDRAM, and stores at least the current frame and the previous frame, for example, the previous frame. The object extraction unit 26 separates the object and the background in the image. The object extraction unit 26 compares the image of the previous frame with the image of the current frame. At this time, as in MPEG (Movi...

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

A region of interest is set within an image, the region of interest is tracked along motion of an object marked out within the image, and coding is performed in a manner that image quality differs between the region of interest and a region other than the region of interest. A wavelet transform unit applies a low-pass filter and a high-pass filter in the respective x and y directions of an original image, and divides the image into four frequency sub-bands so as to carry out a wavelet transform. A quantization unit quantizes, with a predetermined quantizing width, the wavelet transform coefficients outputted from the wavelet transform unit. A motion detector detects the motion of an object. A ROI setting unit moves a ROI region according to this motion of an object. In the case of moving images where a viewpoint changes, the background may be separated from the object and then the ROI region may be moved according to the motion of the object and the motion of the background.

Description

technical field [0001] The present invention relates to an image encoding method, an image encoding device, and an image pickup device, and more particularly, to an image encoding apparatus capable of encoding with different image qualities in each region, an image display method, an image pickup apparatus, and an image decoder capable of adjusting image quality and decoding. Encoding method and device. Background technique [0002] In ISO / ITU-T, standardization of JPEG2000 using discrete wavelet transform (DWT) is underway, succeeding JPEG (Joint Photographic Expert Group), which is a standard technology for compression coding of still images. In JPEG2000, a wide range of image quality from low-bit-rate encoding to lossless compression can be encoded with high performance, and it is easy to implement a scalability function that gradually improves image quality. In addition, in JPEG2000, various functions that are not available in the existing JPEG standard can be prepared....

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): H04N7/30H04N1/41H04N19/60H04N19/126H04N19/132H04N19/139H04N19/149H04N19/167H04N19/34H04N19/51H04N19/635
Inventor 渡边刚冈田茂之
Owner SANYO ELECTRIC CO LTD
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