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A lossy compression encoding method, device and system-on-a-chip

A technology for compressing and encoding images, applied in the field of image processing, can solve problems such as poor image quality, and achieve the effect of reducing size, ensuring image quality, and reducing file size

Active Publication Date: 2021-11-09
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] Embodiments of the present invention provide a lossy compression encoding method, device and system-level chip, which can solve the problem that although lossy compression encoding methods such as JPEG can reduce the size of the encoded image, the quality of the decoded image is relatively poor

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Embodiment Construction

[0065] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0066] The lossy compression coding described in the embodiment of the present invention includes but not limited to JPEG, divX, Xvid, rm (RealMedia), RealMedia Variable Bitrate (RealMedia Variable Bitrate, rmvb for short), and Windows Media Video (Windows Media Video, wmv for short). )coding. The lossy compression coding method provided by the embodiment of the present invention is applicable to all scenarios of storing or transmitting lossy compression coded pictures (such as JPEG pictures), especially the scene of storing or transmitting a large number of lossy compression coded pictures. For example, monitoring scenes such as face capture cameras and vehicle monitoring cameras, mobile terminals with camera functions, and image stor...

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Abstract

The invention discloses a lossy compression encoding method, device and system level chip, belonging to the technical field of image processing. Method: determine the region of interest in the image to be encoded, the region of interest is the image area where the target object in the image to be encoded is located; perform local noise reduction processing on the image to be encoded, obtain the image to be encoded after local noise reduction processing, and perform local noise reduction The processed image to be encoded includes a noise-reduced area and a non-noise-reduced area, and the non-noise-reduced area includes a region of interest; lossy compression encoding is performed on the image to be encoded after local noise reduction processing. Device: a determination module, used to determine the region of interest in the image to be encoded; a processing module, used to perform local noise reduction processing on the image to be encoded; an encoding module, used to perform lossy compression on the image to be encoded after local noise reduction processing coding. The invention can reduce the size of the coded file after the lossy compression coding; at the same time, it can preserve the clarity of the interest area after the lossy compression decoding.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a lossy compression encoding method, device and system-on-chip (System on Chip, SOC for short). Background technique [0002] The lossy compression coding method is widely used in the compression processing of image and video data. Its basic principle is to lose some information in the compression process in exchange for a larger compression ratio and reduce the file size after compression. For example, Joint Photographic Experts Group (JPEG for short) is a lossy compression encoding method based on discrete cosine transform (Discrete Cosine Transform, DCT for short). In surveillance applications, cameras capture images based on specific trigger events. The captured images are usually encoded with JPEG first, and then stored or transmitted. [0003] Some monitoring scenarios will generate a large number of snapshots, for example, the vehicle monitoring bay duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/625H04N19/124H04N19/182H04N19/117H04N19/167G06T5/00G06T5/50
CPCG06T5/002G06T5/50G06T2207/20221H04N19/117H04N19/124H04N19/167H04N19/176H04N19/182H04N19/625G06T5/00
Inventor 陈军
Owner HANGZHOU HIKVISION DIGITAL TECH
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