Intelligent transportation system realizes adaptive compression method with configurable upper limit of jpeg image size

Abstract

The invention relates to an adaptive compression method for an intelligent transportation system that realizes a configurable upper limit of a JPEG picture size, which includes acquiring source image parameter information, calculating a comprehensive compression quality factor, calculating a weighting factor of compression parameters, and performing source image resampling as required, Calculate the comprehensive quantization step factor and modify the standard quantization table into a special quantization table, divide the level and set different JPEG encoding options, perform discrete cosine transform, scalar quantization processing, Huffman encoding to obtain the actual output JPEG image information, save and enter In the self-learning parameter library. Using this intelligent transportation system to realize the self-adaptive compression method with a configurable upper limit of the size of JPEG images, realizes automatic compression processing of high-definition JPEG vehicle images with an upper limit for data storage and transmission, and achieves effective control of images according to requirements Size and quality goals, flexible and convenient use, stable and reliable working performance, and a wide range of applications.

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...

AI Technical Summary

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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