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1, Gradient processing of image 1. Sobel operator Gradient can be calculated according to the x direction or y direction. In fact, it depends on the difference and change of pixel points, such as the junction of black-and-white objects. The difference of pixel value change is very large. The function used for gradient calculation is called Sobe ...

@TOC 1. Introduction of picture format Picture format is the format in which pictures are stored by computers. Common formats are bmp, jpg, png, tif, gif, pcx, tga, exif, fpx, svg, psd, cdr, pcd, dxf, ufo, eps, ai, raw, WMF, webp, avif, apng, etc. (1) BMP format 1. Introduction BMP(Bitmap-File) graphics file is a graphics file format u ...

1, Introduction to image denoising and filtering 1 image denoising 1.1 definition of image noise Noise is an important factor that interferes with the visual effect of image. Image denoising refers to the process of reducing noise in image. There are three kinds of noise classification: additive noise, multiplicative noise and quantization noi ...

Python Xiaobai's topic report - actual combat of OpenCV matting project (4) This series is Python Xiaobai's task "image segmentation and matting based on OpenCV". It should be noted that this series is not a matting project tutorial of OpenCV, but a topic report on this topic. It includes a relatively complete PyQt project. From t ...

0. Introduction to BMP format According to Baidu Encyclopedia BMP We know that BMP is the abbreviation of Bitmap and the standard image file format in the Windows operating system. It is characterized by rich image information because it is hardly compressed, but it also occupies a large disk space. 1 file format The bitmap file consists of ...

1. Use Opencv to read and save images 1.1 image reading The imread() and imshow() functions need to be used for Opencv reading and display. You can use Opencv to read and display the specified picture by using the following code: import cv2 as cv #Import opencv and name it cv img = cv.imread('cat.jpg',-1) #Read the specified picture cv. ...

Chapter 52 binarization experiment based on OV5640 camera In digital image processing, binary image plays a very important role. The binarization of image greatly reduces the amount of data in the image and highlights the contour of the target. Image binarization is widely used in computer vision, image segmentation and artificial intelligence ...

0x00 overview of ideas The overall logic of the program is to recognize your face and save count (counter) pictures of your face, then exit, or press q while running. There are two important cycles 1. Call camera loop continuously ----- while true 2. Process the function of each face recognized by the recognition function ----- for xywh i ...

PIL(Python Image Library) PIL(Python Image Library) is a free image processing toolkit provided by Python ware. Because of its powerful functions, it is already the de facto image processing standard library of Python platform. PIL is very powerful and provides many image processing functions, such as changing image size, rotating image, imag ...

This paper mainly refers to "Research on PSF parameter estimation and image restoration of motion blurred images" Degradation model of motion blurred image The key of image restoration is to determine the degradation model. The degradation model of image is as follows In the time domain and frequency domain, the degraded image ...