Image compressing and uncompressing method based on optical principle

A technology of image compression and optical principle, applied in the direction of image communication, parts of color TV, parts of TV system, etc., can solve the problems of complicated operation and expensive operation equipment, etc.

Active Publication Date: 2013-04-24
CENT SOUTH UNIV
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Problems solved by technology

[0003] The present invention proposes an image compression and decompression method based on optical principles, the purpose

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  • Image compressing and uncompressing method based on optical principle
  • Image compressing and uncompressing method based on optical principle
  • Image compressing and uncompressing method based on optical principle

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0049] like figure 1 Shown is a flow chart of an image compression and decompression method based on the optical principle of the present invention, including the following steps:

[0050] Step 1: sequentially extract the images in the image to be processed, and perform grayscale processing on the images, the number of image frames is n, where n is an integer;

[0051] Taking the images continuously extracted from the movie as an example, compress and decompress the images in the movie video, n is 198;

[0052] like figure 2 Shown are the first 12 frames of images sequentially extracted from the movie, as an example.

[0053] Step 2: Use the blazed grating to modulate the 198 frames of images extracted in step 1. The specific operation process is as follows:

[0054] Step A: i represents the i-th frame image, i=0;

[0055] Step B: Set the vertical directi...

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Abstract

The invention provides an image compressing and uncompressing method based on an optical principle. The method comprises the following steps: extracting a picture of an image to be processed, processing the extracted picture in a grey mode, modulating the picture through a blazed grating, obtaining a composite picture through the fact that amplitude and phase of pixel points of the picture modulated by the blazed grating are respectively added in a one-point-by-one-point mode, conducting Fourier conversion for the composite picture, obtaining diffraction faculae corresponding to the composite picture, filtering the diffraction faculae in a one-by-one mode through a facula filter, and obtaining an uncompressing picture. The method is simple in operation, low in cost, capable of achieving through a common convex lens or through the fact that a computer virtual optical 4f system is used to simulate the Fourier conversion and an inverse transformation process, and capable of being wide used in the field of picture compressing and transmission. Transmission efficiency is improved, the picture obtained through uncompressing is clear, high in recovery degree, small in error with an original picture, and the method is quite large in application space.

Description

technical field [0001] The invention relates to an image compression and decompression method based on the optical principle. Background technique [0002] With the rapid development of multimedia technologies such as broadband networks and digital movies, the acquisition, transmission, and processing of single image data are far from meeting people's requirements for information volume. How to compress and transmit image data with large information capacity such as movies It has received more and more attention from the industry, and among them, image compression technology has become the most critical core technology. Traditional compression techniques such as MPEG can no longer meet the requirements of its development, and the commonly used methods such as wavelet image compression based on JPEG2000 are not completely satisfactory for the compression distortion of continuous images. The emergence of optical technology as a practical technical means has undoubtedly opened...

Claims

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Application Information

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IPC IPC(8): H04N5/253H04N5/926H04N5/14H04N7/26
Inventor 陶少华尹珅
Owner CENT SOUTH UNIV
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