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Video encoding method based on interested regions

A region of interest and video coding technology, applied in the field of video coding based on region of interest, can solve problems such as unsatisfactory image quality

Inactive Publication Date: 2009-11-04
HEFEI KUNAN ELECTRONICS SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to network bandwidth limitations, image quality is always unsatisfactory

Method used

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  • Video encoding method based on interested regions
  • Video encoding method based on interested regions
  • Video encoding method based on interested regions

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Embodiment Construction

[0035] The specific implementation manner of the present invention is further illustrated below.

[0036] The ROI-based coding method first needs to divide the video image into ROI and non-ROI according to the characteristics of the ROI of the human eye. For head and shoulder sequence video images, the face area is the ROI. In order to detect the ROI of the video sequence, the present invention adopts the original face detection algorithm of our laboratory.

[0037] In the sense of rate-distortion optimization, interest-based coding is to make the encoder work at different points according to the different degrees of interest of the human eye in different regions of the image. see figure 1 , assuming that the coding characteristics of the macroblocks are consistent, the point p1 in the figure is the working point of the ROI, and the point p2 is the working point of the non-ROI (background area). For a frame of image, the coding method based on the region of interest is to e...

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Abstract

The invention provides a video encoding method based on interested regions, which is characterized in that images are divided into interested regions and uninterested regions as human eyes decide interested regions of the video images; the bit rate distribution of the interested regions is then carried out; and finally, quantization parameters of the interested regions and the uninterested regions are determined.

Description

technical field [0001] The invention belongs to the field of computer video coding, in particular to a video coding method based on regions of interest. Background technique [0002] Low-rate video transmission is one of the important transmission services in bandwidth-limited network environments such as PSTN and mobile communications. Due to the limitation of network bandwidth, the image quality is always not satisfactory. Since the human eye has the characteristics of a region of interest (ROI), that is, the human eye has different degrees of interest in different regions of an image, such as the most common header in 3G mobile terminals, video calls, and video conferences. Shoulder sequence video images, the face is the region of interest. The ROI-based video coding method makes full use of the subjective characteristics of the video image receiver and the content of the image, which can effectively improve the subjective quality of the image. Contents of the inventi...

Claims

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Application Information

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IPC IPC(8): H04N7/26G06T9/00H04N19/124H04N19/147H04N19/167
Inventor 林润
Owner HEFEI KUNAN ELECTRONICS SCI & TECH