An Image Super-Resolution Reconstruction Method with Single Frame Character Based on Wavelet Neural Network in Internet
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An Image Super-Resolution Reconstruction Method with Single Frame Character Based on Wavelet Neural Network in Internet of Things Ling-li Guo 1 & Marcin Woźniak 2 Accepted: 25 October 2020 # The Author(s) 2020
Abstract The application of the traditional single frame character image super-resolution reconstruction method has some problems, such as noise can not be removed completely and anti-interference performance is poor. A new method for the super-resolution reconstruction of single frame character image based on wavelet neural network is proposed. The structure and interface of image acquisition unit of solid state image sensor are designed. Combined with pinhole imaging model and camera self-calibration, image acquisition of Internet of Things is completed. An image degradation model was established to simulate the degradation process of ideal high-resolution image to low-resolution image. Wavelet threshold denoising method is used to remove the noise in a single frame character image and improve the anti-interference performance of the method. The wavelet neural network reflection model is used to reconstruct the single frame feature image and improve the resolution of the image. The experimental results show that the blur degree of the reconstructed image is always less than 5%. In the whole experiment, the accuracy of this method can be maintained at 80% ~ 90%. The image detail retention rate of the research method is relatively stable. With the increase of the number of experimental images, the retention rate of image details remains between 80% and 95%, indicating that the method is effective in practical application. Keywords Wavelet neural network . Single-frame character . Image reconstruction . Super-resolution . Internet of things
1 Introduction Super-resolution reconstruction of Internet of Things image refers to a digital image processing technique that reconstructs a high-resolution image from one or more low-resolution images. According to different kinds of images, the image superresolution reconstruction mainly consists of super-resolution reconstruction of color images and super-resolution reconstruction of depth images [1]. In the field of image processing, super resolution reconstruction techniques are generally used to increase resolution of images for the acquired low-resolution images. The clarity of a single frame image of the Internet of Things
* Marcin Woźniak [email protected] Ling-li Guo [email protected] 1
Changzhi University, Changzhi 046011, China
2
Faculty of Applied Mathematics, Silesian University of Technology, Gliwice, Poland
is the prerequisite for the subsequent image processing. The high blur degree of the image will aggravate the image problems of the Internet of Things, leading to the unsatisfactory application effect of the Internet of Things [2, 3]. Internet of Things image super-resolution reconstruction has very important application value in many fields. Therefore, the super-resolution reconstruction method for single-frame character images needs to
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