For three-dimensional vision, it is necessary to clearly understand the correspondence between the world coordinate system and the pixel coordinate system. This article uses python for experiments. For the mathematical derivation of internal and external parameters of the camera, please see my previous blog “[AI Mathematics] Internal Parameters of Camera Imaging” “, “[AI Mathematics] Parameters […]
Tag: pixel
Some basic image preprocessing—normalize the scale of all pictures in a file, view the RGB value of each pixel, switch the specified color to white, and switch all pictures in the file from png to jpg
Table of Contents 1. Normalize the scale of all pictures in a file 2. View the RGB value of each pixel of an image 3. Switch the specified color to other colors (switch red to white in the code) 4. Switch all pictures in a file from png to jpg 5. Rename all images in […]
[Pixel Fusion] Fusion of multi-modal medical images and multiple exposure images based on Gaussian filter and PS search with MATLAB code
?About the author: A Matlab simulation developer who loves scientific research. He cultivates his mind and improves his technology simultaneously. For cooperation on MATLAB projects, please send a private message. Personal homepage: Matlab Research Studio Personal credo: Investigate things to gain knowledge. For more complete Matlab code and simulation customization content, click Intelligent optimization algorithm […]
2D feature framework – detecting corner positions in sub-pixels OpenCV v4.8.0
Previous tutorial: Create your own corner detector Next tutorial: Feature Detection Original author Ana Huamán Compatibility OpenCV >= 3.0 Goals In this tutorial you will learn how to Use the OpenCV function cv::cornerSubPix to find a more precise corner position (more precise than integer pixels). Code C++ The tutorial code is shown below. You can […]
[Pixel Fusion] Fusion of multi-modal medical images and multiple exposure images based on Gaussian filter and PS search with MATLAB code
?About the author: A Matlab simulation developer who loves scientific research. He cultivates his mind and improves his technology simultaneously. For cooperation on MATLAB projects, please send a private message. Personal homepage: Matlab Research Studio Personal credo: Investigate things to gain knowledge. For more complete Matlab code and simulation customization content, click Intelligent optimization algorithm […]
android10.0(Q) compile Android kernel (pixel 2)
Download the kernel source code 1. Check the kernel version First, you need to check the kernel version. You can see the kernel version on your phone. 2. Download the source code corresponding to the kernel version cd ~/mount/project/androidq git clone https://aosp.tuna.tsinghua.edu.cn/android/kernel/msm.git cd msm git checkout 4fecde07e68d The execution results are as follows: longzhiye@longzhiye-laptop:~/mount/project/androidq$ git […]
Manipulate pixels using the Numpy module
Compiler: PyCharm 2023.2.1 (Professional Edition) Compilation environment: python3.11 Libraries: cv2, numpy 1. Create array with Numpy 1. Conventional array() method out = numpy.array(object,dtype,copy,order,subok,ndmin) parameter: object: required parameter, type array_like, can have four types: array, any object that exposes the array interface, an object whose __array__ method returns an array, or any (nested) sequence. The function […]
OpenCV4-image pixel operation processing
OpenCV4-image pixel operation processing 1. Image pixel statistics Maximum and minimum values mean and standard deviation 2. Pixel operations between two images Comparison operation between two images Logical operations on two images 3. Image binarization 4.LUT 1. Image pixel statistics Find the maximum, minimum, average, mean square error and many other statistical functions of image […]
C++ language GDAL batch cropping of multi-band raster images: cropping based on the number of pixels
This article introduces the GDAL module based on the C + + language. According to the given number of pixel rows and number of columns strong>, batch crop a large number of multi-band raster remote sensing image files, and save the resulting cropped new multi-band remote sensing image files Method at the specified path. In […]
[Encode text into image gray level] Encoded in ASCII and mixed with gray level bits to hide the text string into the lowest bits of image pixels, making it inconspicuous Research (Matlab code implementation)
Welcome to this blog Advantages of bloggers:Blog content should be as thoughtful and logical as possible for the convenience of readers. Motto:He who travels a hundred miles is half as good as ninety. The directory of this article is as follows: Table of Contents 1 Overview 2 Operation results 3 References 4 Matlab code implementation […]