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Super-resolution reconstruction method and device based on half-error reverse projection

A technology of super-resolution reconstruction and reverse projection, which is applied in the direction of using projection device image reproducer, projection device, color TV parts, etc., can solve the problems of limited application range, affecting visual experience, and banding, etc. Achieve the effect of reducing cumulative effect, good quality and visual experience

Active Publication Date: 2017-09-12
TSINGHUA UNIV
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Problems solved by technology

However, this method has a big disadvantage that there are often "ringing" artifacts in the edge part of the reconstructed high-resolution image
This "ringing" artifact can severely impact the visual experience, making it of limited use

Method used

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  • Super-resolution reconstruction method and device based on half-error reverse projection
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  • Super-resolution reconstruction method and device based on half-error reverse projection

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] The reverse iterative projection method used in the prior art has been found through research to produce regular "ringing" artifacts. Once "ringing" artifacts are present in the estimated high-resolution image, "ringing" artifacts will appear in the simulated low-resolution image. However, the "ringing" artifacts in the simulated low-resolution image are carried into the estimated high-resolution image through the upsampling process, which is continuously enhanced with iterations.

[0029] The invention proposes a method for reconstructing high resolution based on multi-frame video images, which method is based on half-error back projection. That is to say, both the error and the actually observed low-resolution i...

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Abstract

The invention discloses a super-resolution reconstruction method based on half-error reverse projection. The method comprises steps that M actual observation images are acquired; an initial high resolution image is calculated; according to the actual observation images and the initial high resolution image, a (t+1)-times iteration high resolution image is acquired; simulation observation of the high resolution image is carried out to acquire a corresponding simulation observation low resolution image, and an error between a (t+1)-times iteration actual observation image and the simulation observation low resolution image is calculated; the error or the actual observation image is projected to the high resolution image in a reverse mode; iteration stops when the satisfactory result is acquired. The method is advantaged in that the accumulation effect of ringing pseudo shadow can be effectively reduced, and the reconstructed high resolution image is made to have better quality and vision experience. The invention further discloses a super-resolution reconstruction device based on half-error reverse projection.

Description

technical field [0001] The invention relates to the field of image and video data processing, in particular to a super-resolution reconstruction method and device based on half-error back projection. Background technique [0002] A higher resolution image contains more detail for the same scene. Whether it is from the perspective of application or from the perspective of visual experience, it is expected to obtain high-resolution images. However, in reality, many factors make it impossible to obtain high-resolution images. There are many factors, for example, due to cost control, the purchased cameras are not good enough; or in some specific scenarios, high-resolution images cannot be obtained. These factors also include atmospheric turbulence, motion blur, system response functions, and noise. Imaging is affected by these factors, and the resolution of the obtained image is often not high, and such an image is called a low-resolution image. However, there is an urgent n...

Claims

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Application Information

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IPC IPC(8): H04N9/31G03B21/14
CPCG03B21/142H04N9/3188
Inventor 张利周建锋
Owner TSINGHUA UNIV
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