Tag：opencv
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(image processing) homework in class 03
1. QT creator create UI It is a little simple packaging of the image processing program. Two label controls are used to display images. Different binary images are presented on the right through the input global threshold. 2. Convert UI to PY First, you need to install pyqt5, and then convert it through the pyuic5 […]
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In depth learning, RCNN is used to identify the verification code of indefinite length calculation questions (pytorch version, LSTM + ctcloss)
Here, after using transfer learning RESNET to train calculation problems in the previous article, it is difficult to solve the problem of verification code with multiple or indefinite length digits. Therefore, RNN is used to solve the verification code problem of calculation problems with indefinite length sequence. This solution is also applicable to verification codes […]
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Opencv removes outliers and explains findcircuits() and connectedcomponentswithstats()
Findcontours() and connectedcomponentswithstats() functions can remove image outliers respectively connectedComponentsWithStats()The principle of the function is to detect the connected areas of pixels (the connected graph should not be introduced -). Each white spot area in the above figure belongs to one connected area. Of course, the text part is also. After detecting each […]
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The whole process of license plate recognition project — opencv knowledge self-study
catalogue What is opencv? Basic knowledge of image digitization Image acquisition Image transformation Change size Content analysis of license plate recognition Locate license plate noise reduction Morphological processing Threshold segmentation + edge detection What is opencv? Opencv (open source computer vision library) is an open source computer vision and machine learning library. It provides interfaces […]
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Opencv bit operation, CV2 bitwise_ and，cv2. bitwise_ or，cv2. bitwise_ not，cv2. bitwise_ xor
catalogue And operation Or operation Non operation XOR operation Bit operation complete code And operation And operation in opencv, using CV2 bitwise_ And method def bitwise_and(src1, src2, dst=None, mask=None) SRC1: images involved in and operation Src2: and operation with src2 and SRC1 DST: an output array of the same size and type as the input […]
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Opencv perspective transformation to extract feature images
catalogue Basic introduction cv2. Introduction to getperspectivetransforms cv2. Introduction to warpsperspective Find feature image Complete code and operation effect Basic introduction Note: the premise of this article is that you have learnedImage Affine Transformation Using the perspective transformation of OpenCV can make us simply extract the desired information. We only need to know the four […]
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Haar and LBP cascade classifier based on OpenCV
cascadeclassifier Principle AdaBoost ·Viola and Jones – 2001 at CVPR ·A real-time object (face) detection framework ·The training speed is very slow and the detection speed is very fast ·5000 positive face samples and 3 million non-human face negative samples Weak classifier – weak classifier = feature Strong classifier – a linear combination of multiple […]
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Opencv installation tutorial under windows (Xiaobai tutorial)
Opencv introduction Opencv is a cross platform computer vision library based on BSD license (open source), which can run on Linux, windows, Android and Mac OS operating systems. It is lightweight and efficient – it is composed of a series of C functions and a small number of c++ classes. It also provides interfaces with […]
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Target detection: Raspberry pie runs yolov5 successfully, with complete image source attached
Raspberry Pie: target detection 1、 Foreword 2、 Raspberry pie deep learning environment Image: 3、 Building yolov5 based on the image of deep learning environment 1. Set Python as the default Python 3 2. Install pytorch 3. Install opencv 4. Install yolov5 4、 Yolov5 image sharing and running tutorial: 1、 Foreword 1. I had always planned […]
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[Python] intelligent attendance system based on face recognition (pyqt5 + MySQL + openCV) [PC part – source code attached]
[Python] attendance system based on face recognition [PC part] 1、 Project introduction The programming language of the project is Python 3 6. Programming tool pychart, other tools QT designer and Navicat, form information is saved in the local MySQL database, and opencv is mainly used for face recognition algorithm. At present, the following functions have […]
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[group work] [Python] Application of reversible hierarchical encryption technology in Video Privacy Protection
Application of reversible hierarchical encryption technology in Video Privacy Protection 1、 Abstract As a typical image region of interest, human face is the most critical information to recognize a person. Hierarchical region encryption for visual perception enhances the pertinence and flexibility of encryption. Based on the partial encryption algorithm of video, this paper proposes an […]