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Method and system for generating stream of image frames

A technology of image frames and background images, applied in the field of video coding

Pending Publication Date: 2022-06-24
AXIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can also result in higher storage usage than would be required to keep only the most "interesting" information in the image or video stream

Method used

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  • Method and system for generating stream of image frames
  • Method and system for generating stream of image frames
  • Method and system for generating stream of image frames

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Experimental program
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Embodiment Construction

[0057] As mentioned above, various embodiments of the present invention aim to reduce the bandwidth required to stream video compared to when using conventional encoding. This is achieved by streaming only the information that is of interest to the operator and streaming that information at a high rate. Information of little or no interest to the operator is streamed at a significantly lower rate.

[0058] Briefly, various embodiments of the present invention may be described as involving camera systems including cameras (eg, stationary cameras) that, for example, capture images of scenes in which human activity is of interest to an operator. Fixed cameras are cameras that do not change their field of view during operation after installation. However, the camera may be a pan-tilt-zoom (PTZ) camera capable of changing its field of view in pan and tilt directions and zooming in and out. Where the camera is a PTZ camera, it should be understood that when capturing an image of t...

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PUM

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Abstract

Methods and systems for generating a stream of image frames are provided. An image frame in a streaming video is segmented into a background section and an instance section. A background image frame containing background segments is created. At least some of the instance sections are classified as movable objects of interest and movable objects of non-interest. During the background update time period, when the movable object of non-interest has moved to reveal a further background region, the background image frame is updated to include the further background region in the background image frame. A foreground image containing a movable object of interest is created. The updated pixel blocks of the background image frame and the foreground image frame are encoded. An encoded foreground image frame stream having a first frame rate is generated. An encoded, updated background image frame stream having a second, lower frame rate is generated.

Description

technical field [0001] The present invention relates to video coding and, more particularly, to generating video streams in a bandwidth efficient manner. Background technique [0002] Cameras, such as surveillance cameras, are used in many different applications, both indoors and outdoors, for monitoring a variety of environments. Images depicting the captured scene may be monitored by, for example, an operator or security personnel. In many cases, the operator may be more interested in some objects in the captured image than others. For example, the operator of a surveillance camera may be very interested in human activity, but may be less interested in other moving or changing (but unimportant) objects in the image, such as animals, passing vehicles, or trees moving in the wind . [0003] However, conventional encoders typically encode entire image frames of a video stream in the same way, regardless of the operator's interest. As a result, the "less interesting" parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176G06T7/11G06V10/25
CPCH04N19/176G06T7/11H04N19/17H04N19/167H04N19/20H04N19/132H04N19/507H04N19/146H04N19/139G06T7/194H04N19/119H04N19/137H04N19/162G06T7/215G06V20/52G06T2207/10016G06T2207/30232H04N7/013H04N7/183G06F18/24G06F18/40
Inventor 尼克拉·丹尼尔松范星
Owner AXIS