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Screen shooting image moire removal method oriented to Raw domain

A moiré and image technology, applied in the field of image restoration, can solve problems such as difficult to restore colors

Active Publication Date: 2021-07-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the color rendering problems of different display screens and the non-linear processing of sRGB domain images in the ISP process, there is a serious color difference between the screen-shot images in the sRGB domain and the clean images obtained by direct screenshots or saving, resulting in the network being demoiréed. It is difficult to restore the original color while doing the task of tattooing

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  • Screen shooting image moire removal method oriented to Raw domain
  • Screen shooting image moire removal method oriented to Raw domain
  • Screen shooting image moire removal method oriented to Raw domain

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] To obtain the training data set required by the present invention is to construct a Raw domain moiré screen shot image data set that is strictly aligned and has category labels. The data set consists of Raw domain moiré screen shot images, Raw domain clean images, sRGB domain moiré screen The image pair composed of the screen shot image and the clean image in the sRGB domain is called the Raw domain moiré screen shot image data set, and the data set is divided into a training set and a test set. Moiré screen images in Raw domain and moiré screen images in sRGB domain are captured by different models of mobile phone cameras; clean images in sRGB domain are obtained by direct download or screenshots, clean images in Raw domain are obtained from corresponding clean images in sRGB domain The sRGB to Raw n...

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Abstract

The invention discloses a screen shooting image moire removal method oriented to a Raw domain. The method comprises the steps of constructing a Raw domain moire removal network RDNet, wherein the overall structure is composed of a data classification network, a multi-scale moire removal network and an ISP network; training the Raw domain moire removal network RDNet, and generating a Raw domain moire removal training model and an ISP model respectively; inputting the Raw domain moire screen shooting image in the test set into a Raw domain moire removal network RDNet, firstly obtaining an image category label through a classification model, and then obtaining a Raw domain moire removal image through a multi-scale moire removal network; and inputting the Raw domain moire-removed image into an ISP network, and finally obtaining a corresponding sRGB domain moire-removed image. Compared with the prior art, moire patterns with different scales can be removed according to the characteristic of wide moire pattern frequency distribution; and the color image and the text image in the screen shot image can be processed in a targeted manner.

Description

technical field [0001] The invention belongs to the technical field of image restoration, and in particular relates to a method for removing moiré in a screen-shot image based on a Raw domain. Background technique [0002] Moiré refers to the irregular fringes produced when two arrays of different frequencies are aliased together. When a digital camera is used to shoot a digital display device, aliasing occurs between the photosensitive element of the camera and the display device, and it is easy to appear moiré, which seriously affects the quality of the captured image. Due to its irregular shape, various colors, and different densities, moiré is difficult to remove. [0003] Existing methods for removing moiré in screen shot images are mainly divided into two categories: [0004] One is traditional methods, such as: placing anti-aliasing filters in front of the camera lens, using interpolation algorithms in the process of optimizing image ISP (Image Signal Processing), a...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06K9/62G06N3/04G06N3/08
CPCG06N3/08G06T2207/10024G06N3/045G06F18/241G06T5/77
Inventor 岳焕景毛岩杨敬钰
Owner TIANJIN UNIV
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