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Image acquisition and compression method and device

An image acquisition and compression method technology, applied in image communication, digital video signal modification, electrical components, etc., can solve complex and inefficient problems, and achieve the effect of reducing complexity and improving the quality of reconstructed images

Active Publication Date: 2016-05-04
李峰
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that traditional image acquisition and compression methods are complicated and inefficient, and the compressed sensing method is contrary to the traditional usage habits of users, and provide an efficient image acquisition and compression method, which can directly collect thumbnail data and compressed data, It not only meets the needs of users to review the imaging effect in real time, but also reconstructs the original image when the user needs to view the details of the original image

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Embodiment 1

[0036] The quantization resolution of each pixel is 8 bits, and the fixed compression ratio is 8 below as an example to describe a kind of image acquisition and compression method that the present invention proposes in detail, as figure 1 shown, including the following:

[0037] 1. Downsampling the original image acquired by the image array detector to obtain thumbnail data of the original image.

[0038] Take a CMOS image array detector with an array size of 2048×2048 and 256 times downsampling as an example to illustrate the downsampling process: divide the array into several virtual small blocks by 16×16, and follow the sequence from left to right and from top to bottom In the following sequence, only the upper leftmost pixel in each small block is read, so that the 256 times downsampling of the original image is realized, and the thumbnail image data is obtained. According to this example, those skilled in the art can use the same method to divide the array into blocks an...

Embodiment 2

[0055] According to the image acquisition and compression method described in embodiment 1, a set of image acquisition and compression device is realized, the structure is as follows figure 2 As shown, it includes: image detection module 101, down-sampling module 102, compressed sensing module 103, compressed data output module 104, image reconstruction module 105; wherein the image detection module is connected with down-sampling module and compressed sensing module respectively, down-sampling module and The compressed sensing module is respectively connected with the compressed data output module;

[0056] The image detection module is used to obtain the original image, which is realized by using an existing image array detector in this embodiment;

[0057] The down-sampling module is used to down-sample the original image output by the image detection module to obtain thumbnail image data;

[0058] The compressed sensing module is used to perform sensing matrix sampling b...

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Abstract

The present invention relates to an image acquisition and compression method and belongs to the digital image acquisition and processing field. The method includes the following steps that: the thumbnail data of an original image are acquired through downsampling; sensing matrix sampling is performed on the original image, so that the compression data of the original image can be obtained; the thumbnail image data and the compression data obtained through compressing a sensing matrix are outputted sequentially according to a preset compression ratio, so that codes streams which are to be transmitted or stored can be formed; and after the code streams are stored and transmitted, an image can be previewed through the thumbnail image data, and the original image is reconstructed based on the thumbnail image data and the compression data obtained through compressing the sensing matrix. With the method of the invention adopted, the complexity of a traditional image compression method can be effectively decreased; a defect of a method according to which an image can be seen through a reconstruction step based on conventional sensing data compression can be eliminated; the thumbnail image data are adopted as constraint conditions, the solution space of image reconstruction can be effectively reduced, and computing speed is improved; and a requirement for a network in compression data transmission can be decreased.

Description

technical field [0001] The invention relates to a data collection and compression method and device, in particular to a high-efficiency image collection and compression method and device, belonging to the technical field of digital image collection and processing. Background technique [0002] In order to solve the storage and transmission challenges that need to be faced when dealing with massive image data, the traditional method usually adopts compression technology, that is, by realizing a refined expression of the original digital signal, it reduces the impact of the original data on storage space and transmission bandwidth. limit. At present, compression techniques can be roughly divided into two categories: lossless compression and lossy compression. Lossless compression, as the name implies, is to use the refined expression after signal compression to recover the original digital signal without any distortion; lossy compression is to use the refined expression after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/13H04N19/91H04N19/132H04N19/117H04N19/196
Inventor 李峰郭毅李忠
Owner 李峰
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