Programmer Group

1, Principle of Chinese character lattice font 1, Chinese character coding 1. Location code The national standard code is a four digit hexadecimal number, and the location code is a four digit decimal number. Each national standard code or location code corresponds to a unique Chinese character or symbol. However, because we rarely use hexad ...

2021 national college student electronic design competition question F intelligent drug delivery car Premise: This article focuses on sharing our own experiences and feelings and reflecting on our own shortcomings. The problem completion of our group is not very good. We solved the most important part, camera tracking and camera digital recogn ...

preface opencv version 4.1.2.30 (4. X > = version) and my version 4.5.3 are required 1, LUT There is only one threshold in the threshold comparison method described above. If you need to compare with multiple thresholds, you need to use a look-up table (LUT). LUT is a gray value mapping table, which takes the gray image value as the ...

Python+OpenCV+dlib for face recognition IDE: Jupyter Notebook(Anaconda3) Python version: Python 3.8 Native environment: Windows 10 Principle overview Call dlib library for face recognition, call predictor "shape_predictor_68_face_landmarks.dat" for 68 point face calibration, and use opencv library function for simple image ...

11. HighGUI graphical user interface 11.1 creation and use of slider 11.1,1 create slider: createTrackbar() function The createTrackbar function is used to create a slider with adjustable values: int cv::createTrackbar(const cv::String &trackbarname, const cv::String &winname, int *value, int count, cv::TrackbarCallback onChange = ( ...

1, Serial connection Prepare two USB to TTLS and several DuPont cables, cross connect the RX and TX pins of the two USB to TTLS, and connect the two USB interfaces to a laptop (simulate the serial port transmission between the two computers). 2, Transfer file Using the serial port debugging assistant that can transfer files (I use SSCOM ...

1. Introduction to imutils function imutils is a package based on OPenCV, which can call the OPenCV interface more simply. It can easily realize a series of operations such as image translation, rotation, scaling, skeletonization and so on. Installation method: pip install imutils Confirm that numpy,scipy,matplotlib and opencv are installe ...

1. Image digitization 1.1 Mat class in initial OpenCV 1.1.1 initial Mat The constructor of Mat class is as follows: Mat(int rows, int cols, int type) Where, type represents the type, including the number of channels and their data types. CV_8UC(n): uchar type occupying 1 byte CV_8SC(n): char type occupying 1 byte CV_16UC(n): ushor ...

   1 point operation    features: the input image and output image are point-to-point copy operations. In this copy process, the gray value will be converted. This conversion operation can be linear or nonlinear. It can be expressed as:    application: contrast enhancement, contrast stretching, image gray translation ...

1. Picture loading, displaying and saving cv2.imread(filename, flags): read and load images cv2.imshow(winname, mat): displays a picture cv2.waitKey(): wait for the picture to close cv2.imwrite(filename, img): save the picture 2. Image display window creation and destruction cv2.namedWindow(winname, attribute): create a window cv2.destro ...