# opencv_tutorials
**Repository Path**: physicsandprogram/opencv_tutorials
## Basic Information
- **Project Name**: opencv_tutorials
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-06-21
- **Last Updated**: 2020-12-19
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# OpenCV 4.0 Tutorial
[](https://opencv.org/) [](https://docs.opencv.org/4.0.0/d9/df8/tutorial_root.html)
✒️ [中文版本](./README_CN.md)
## Introduction
This repository contains source code of OpenCV Tutorial application, the environment is python3.0 and opencv4.0.
## Sample
- **Image load**
```python
import cv2
src = cv2.imread("test.png")
cv2.namedWindow("input", cv2.WINDOW_AUTOSIZE)
cv2.imshow("input", src)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
- **Gray Image**
```python
gray = cv2.cvtColor(src, cv.COLOR_BGR2GRAY)
```
***More opencv4.0 tutorials plese follow the learning road as below*** 👇👇👇
## Learning Road ⛳️
***Annotation:***
- ✔️ **: Basic**
- ✏️ **: Attention**
- ❣️ **: Important**
No | Description | Annotation
:--------: | :--------: | :--------:
code_001 | [Load Image](python/code_001/opencv_001.py) | ✔️
code_002 | [Gray Image](python/code_002/opencv_002.py) | ✔️
code_003 | [Image Create](python/code_003/opencv_003.py) | ✔️
code_004 | [Pixel Read and Write](python/code_004/opencv_004.py) | ✔️
code_005 | [Image Pixel Arithmetic Operations](python/code_005/opencv_005.py) | ✔️
code_006 | [Image Pseudo-Color Enhancement](python/code_006/opencv_006.py) | ✔️
code_007 | [Image Pixel Operation (Logical Operation)](python/code_007/opencv_007.py) | ✔️
code_008 | [Image Channel Separation and Merging](python/code_008/opencv_008.py) | ✔️
code_009 | [Color Space Conversion](python/code_009/opencv_009.py) | ✏️
code_010 | [Image Pixel Value Statistics](python/code_010/opencv_010.py) | ✔️
code_011 | [Image Pixel Normalization](python/code_011/opencv_011.py) | ✔️
code_012 | [Video Read and Write](python/code_012/opencv_012.py) | ✔️
code_013 | [Image Flip](python/code_013/opencv_013.py) | ✔️
code_014 | [Image Interpolation](python/code_014/opencv_014.py) | ✔️
code_015 | [Draw Geometry](python/code_015/opencv_015.py) | ✔️
code_016 | [ROI of Image](python/code_016/opencv_016.py) | ✔️
code_017 | [Image Histogram](python/code_017/opencv_017.py) | ✔️
code_018 | [Histogram Dqualization](python/code_018/opencv_018.py) | ✏️
code_019 | [Histogram Comparison](python/code_019/opencv_019.py) | ✔️
code_020 | [Histogram Backprojection](python/code_020/opencv_020.py) | ✔️
code_021 | [Image Convolution](python/code_021/opencv_021.py) | ✔️
code_022 | [Averaging and Gaussian Blur](python/code_022/opencv_022.py) | ❣️
code_023 | [Median Blur](python/code_023/opencv_023.py) | ✔️
code_024 | [Image Noise](python/code_024/opencv_024.py) | ✔️
code_025 | [Smoothing Images](python/code_025/opencv_025.py) | ✔️
code_026 | [Gaussian Bilateral Blur](python/code_026/opencv_026.py) | ✔️
code_027 | [Mean-shift Blur)](python/code_027/opencv_027.py) | ✔️
code_028 | [Image Integral Algorithm](python/code_028/opencv_028.py) | ✔️
code_029 | [Fast Image Edge Filtering Algorithm](python/code_029/opencv_029.py) | ✔️
code_030 | [Custom Filter](python/code_030/opencv_030.py) | ✔️
code_031 | [Sobel Operator](python/code_031/opencv_031.py) | ✔️
code_032 | [More Gradient Operators](python/code_032/opencv_032.py) | ✔️
code_033 | [Laplace Operator](python/code_033/opencv_033.py) | ✔️
code_034 | [Image Sharpening ](python/code_034/opencv_034.py) | ✔️
code_035 | [USM Sharpen Algorithm](python/code_035/opencv_035.py) | ✔️
code_036 | [Canny Edge Detection](python/code_036/opencv_036.py) | ❣️
code_037 | [Image Pyramid](python/code_037/opencv_037.py) | ✔️
code_038 | [Laplace Pyramid](python/code_038/opencv_038.py) | ✔️
code_039 | [Image Template Matching](python/code_039/opencv_039.py) | ✔️
code_040 | [Binary introduction](python/code_040/opencv_040.py) | ✔️
code_041 | [Basic Thresholding](python/code_041/opencv_041.py) | ✔️
code_042 | [OTSU Thresholding](python/code_042/opencv_042.py) | ✏️
code_043 | [TRIANGLE Thresholding](python/code_043/opencv_043.py) | ✔️
code_044 | [Adaptive Thresholding](python/code_044/opencv_044.py) | ✏️
code_045 | [Binary and Smoothing](python/code_045/opencv_045.py) | ✏️
code_046 | [Image Connectivity component](python/code_046/opencv_046.py) | ✔️
code_047 | [Image Connected component state statistics](python/code_047/opencv_047.py) | ✔️
code_048 | [Image Contours](python/code_048/opencv_048.py) | ❣️
code_049 | [Bounding Rectangle](python/code_049/opencv_049.py) | ❣️
code_050 | [Contour Area and Perimeter](python/code_050/opencv_050.py) | ✏️
code_051 | [Contour Approximation](python/code_051/opencv_051.py) | ✔️
code_052 | [Contour Centroid Calculate](python/code_052/opencv_052.py) | ✔️
code_053 | [HuMoment for Contour Matching](python/code_053/opencv_053.py) | ✔️
code_054 | [Contour Cricle and Ellipse fitting](python/code_054/opencv_054.py) | ✔️
code_055 | [Convex Hull](python/code_055/opencv_055.py) | ✏️
code_056 | [Fitting a Line](python/code_056/opencv_056.py) | ✔️
code_057 | [Point Polygon Test](python/code_057/opencv_057.py) | ✔️
code_058 | [The Largest Inner Circle](python/code_058/opencv_058.py) | ✔️
code_059 | [Hoffman Line Detection](python/code_059/opencv_059.py) | ✔️
code_060 | [Probability Hoffman Line Detection](python/code_060/opencv_060.py) | ❣️
code_061 | [Hoffman Cricle Detection](python/code_061/opencv_061.py) | ❣️
code_062 | [Dilation and Erosion](python/code_062/opencv_062.py) | ❣️
code_063 | [Structuring Element](python/code_063/opencv_063.py) | ✔️
code_064 | [Opening Transformation](python/code_064/opencv_064.py) | ✏️
code_065 | [Closing Transformation](python/code_065/opencv_065.py) | ✏️
code_066 | [Application of Opening and Closing Operations](python/code_066/opencv_066.py) | ✏️
code_067 | [Top Hat](python/code_067/opencv_067.py) | ✔️
code_068 | [Black Hat](python/code_068/opencv_068.py) | ✔️
code_069 | [Morph Gradient](python/code_069/opencv_069.py) | ✔️
code_070 | [Contour based on Morph Gradient](python/code_070/opencv_070.py) | ✏️
code_071 | [Hit and Miss](python/code_071/opencv_071.py) | ✔️
code_072 | [Defect Detecting-1](python/code_072) | ✔️
code_073 | [Defect Detecting-2](python/code_073/opencv_073.py) | ✔️
code_074 | [Extract the Maximum Contour and Coding Key Points](python/code_074) | ✔️
code_075 | [Image Inpainting](python/code_075/opencv_075.py) | ✔️
code_076 | [Perspective Transformation](python/code_076/opencv_076.py) | ✏️
code_077 | [Video Read, Write and Process](python/code_077/opencv_077.py) | ✏️
code_078 | [Identify and Track Specific Color Objects in Video](python/code_078) | ✔️
code_079 | [Video Analysis-Background/Foreground Extraction](python/code_079/opencv_079.py) | ✔️
code_080 | [Video Analysis–Background Subtraction and ROI Extraction of the Foreground](python/code_080) | ✔️
code_081 | [Corner Detection-Harris](python/code_081) | ✔️
code_082 | [Corner Detection-Shi-Tomas](python/code_082) | ✏️
code_083 | [Corner Detection-Sub-Pixel ](python/code_083) | ✔️
code_084 | [Video Analysis-KLT Optical Flow-1](python/code_084) | ✏️
code_085 | [Video Analysis-KLT Optical Flow-2](python/code_085) | ✏️
code_086 | [Video Analysis-Dense Optical Flow](python/code_086) | ✏️
code_087 | [Video Analysis-Frame Difference Moving Object Analysis](python/code_087/opencv_087.py) | ✔️
code_088 | [Video Analysis-Meanshift](python/code_088) | ✏️
code_089 | [Video Analysis-CamShift](python/code_089) | ✏️
code_090 | [Video Analysis-Object Movement Trajectory Drawing](python/code_090) | ✔️
code_091 | [Object Detection-HAAR Cascade Classification ](python/code_091) | ✔️
code_092 | [Object Detection-HAAR Feature Analysis](python/code_092) | ✔️
code_093 | [Object Detection-LBP Feature Analysis](python/code_093/opencv_093.py) | ✔️
code_094 | [ORB Feature Critical Point Detection](python/code_094) | ✏️
code_095 | [ORB Feature Descriptor Matching](python/code_095) | ✔️
code_096 | [Multiple Descriptor Matching Methods](python/code_096) | ✏️
code_097 | [Location of Known Objects Based on Descriptor Matches](python/code_097) | ✏️
code_098 | [SIFT Feature Critical Point Detection](python/code_097) | ✔️
code_099 | [SIFT Feature Descriptor Matching](python/code_097) | ✔️
code_100 | [HOG Pedestrian Detection](python/code_100/opencv_100.py) | ✔️
code_101 | [HOG Multiscale Detection](python/code_101/opencv_101.py) | ✏️
code_102 | [HOG Extract Descriptor](python/code_102/opencv_102.py) | ✔️
code_103 | [HOG Use Descriptors to Generate Sample Data](python/code_103/opencv_103.py) | ✔️
code_104 | [(Detection Case)-HOG+SVM Train](python/code_104/opencv_104.py) | ✔️
code_105 | [(Detection Case)-HOG+SVM Predict](python/code_105/opencv_105.py) | ✔️
code_106 | [AKAZE Features and Descriptors](python/code_106) | ✔️
code_107 | [Brisk Features and Descriptors](python/code_107) | ✔️
code_108 | [GFTT Detector](python/code_108) | ✔️
code_109 | [BLOB Feature Analysis](python/code_109) | ✔️
code_110 | [KMeans Data Classification](python/code_110) | ✔️
code_111 | [KMeans Image Segmentation](python/code_111) | ✔️
code_112 | [KMeans Background Change](python/code_112) | ✔️
code_113 | [KMeans Extract Image Color Card](python/code_113) | ✔️
code_114 | [KNN Classification](python/code_114) | ✔️
code_115 | [KNN-Train Data Save and Load](python/code_115) | ✔️
code_116 | [Decision Tree Algorithm](python/code_116) | ✔️
code_117 | [Image Mean-shift Segmentation](python/code_117) | ✔️
code_118 | [Grabcut-Image Segmentation](python/code_118) | ✔️
code_119 | [Grabcut-Background Change](python/code_119) | ✏️
code_120 | [Qrcode detect and decode](python/code_120) | ✏️
code_121 | [DNN- Read the information of each layer of the model](python/code_121) | ✔️
code_122 | [DNN- Realize image classification](python/code_122) | ✔️
code_123 | [DNN- Model runs to set the target device and compute the background](python/code_123) | ✔️
code_124 | [DNN- SSD Single Image Detection](python/code_124) | ✔️
code_125 | [DNN- SSD Real-time Video Detection](python/code_125) | ✔️
