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Self-adaptive compression method achieving matching of joint photographic experts group (JPEG) image size upper limits of intelligent transportation system

An intelligent transportation and self-adaptive technology, applied in image communication, television, electrical components, etc., can solve the problems of poor image quality and severe compression, and achieve the effect of flexible and convenient use, wide application range, and effective control of image size and quality

Active Publication Date: 2013-05-15
SHANGHAI BAOKANG ELECTRONICS CONTROL ENG
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Problems solved by technology

However, the common JPEG image compression method can only specify the compression quality factor subjectively, so that the actual output image after compression is often larger than the strict upper limit specified by the business system, or often compressed too much and far smaller than the acceptable size of the business system The upper limit results in poor image quality

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  • Self-adaptive compression method achieving matching of joint photographic experts group (JPEG) image size upper limits of intelligent transportation system
  • Self-adaptive compression method achieving matching of joint photographic experts group (JPEG) image size upper limits of intelligent transportation system
  • Self-adaptive compression method achieving matching of joint photographic experts group (JPEG) image size upper limits of intelligent transportation system

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Embodiment Construction

[0053] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0054] see Figure 1 to Figure 5 As shown, the adaptive compression processing method for realizing the configurable upper limit of the JPEG image file size in the intelligent transportation and security business system includes the following steps:

[0055] (1) The system reads in the source JPEG image data information;

[0056] (2) system obtains corresponding source image parameter information according to described source JPEG image data information, and this source image parameter information comprises image data size, image height and width, image brightness and color quantization table, image bit depth, image color type;

[0057] (3) The system calculates the comprehensive compression quality factor according to the quality requirement and size upper limit requirement information of the target image input by the user, specifically:

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Abstract

The invention relates to a self-adaptive compression method achieving matching of joint photographic experts group (JPEG) image size upper limits of an intelligent transportation system. The method includes: acquiring parameter information of a source image, calculating an integrated compression quality factor, calculating weighting factors of compression parameters, re-sampling for the source image according to the need, calculating an integrated quantization step factor and revising a standard quantization table to a special quantization table, carrying out ranking and setting up different JPEG coding options, carrying out discrete cosine transformation, scalar quantization processing and Huffman coding to obtain JEPG image information actually input, and storing the information into a self-learning parameter bank. The self-adaptive compression method achieving the matching of the JPEG image size upper limits of the intelligent transportation system achieves automatic compression processing with the upper limits capable of being matched with high-definition JPEG vehicle images to facilitate data storage and transmission, and achieves the purpose of effectively controlling the size and the quality of the images according to the need. The usage is flexible and convenient, the working performance is stable and reliable, and the range of application is relatively wide.

Description

technical field [0001] The present invention relates to the field of intelligent transportation and security, in particular to the technical field of integrated security checkpoint supervision system in intelligent transportation and security, and specifically refers to an adaptive compression process in which the upper limit of JPEG image file size can be configured in an intelligent transportation and security business system method. Background technique [0002] In intelligent transportation and security systems, the front-end bayonet device is the basic implementation of the system, which realizes the capture and recognition of passing vehicles, and the acquisition, encoding, storage and transmission of vehicle images. The image acquisition of bayonet equipment adopts industrial-grade color CCD cameras, and with the improvement of security requirements, the requirements for high-definition pictures of shooting scenes, various security equipment manufacturers have launche...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/102
Inventor 余永桂赵昕陈宏
Owner SHANGHAI BAOKANG ELECTRONICS CONTROL ENG
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