opencv-python 4.2 函数手册

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cv2.absdiff()
cv2.accumulate()
cv2.accumulateProduct()
cv2.accumulateSquare()
cv2.accumulateWeighted()
cv2.adaptiveThreshold() # 图像自适应局部二值化
cv2.add() # 两个图像相加
cv2.addText() # 添加文字
cv2.addWeighted() # 调整图像亮度与对比度
cv2.applyColorMap()
cv2.approxPolyDP() # 多边形逼近轮廓
cv2.arcLength() # 轮廓周长,弧长
cv2.arrowedLine() # 带箭头的线
cv2.ACCESS_FAST #todo

cv2.batchDistance()
cv2.bilateralFilter() # 高斯双边滤波。保留图像的边缘，边缘保留滤波，用于美颜，滤镜
cv2.bitwise_and() # 两个图像的逻辑与运算
cv2.bitwise_not() # 一个图像的像素取反
cv2.bitwise_or() # 两个图像的逻辑或运算
cv2.bitwise_xor() # 异或
cv2.blur() # 图像均值模糊
cv2.borderInterpolate()
cv2.boundingRect() # 轮廓的外接矩形
cv2.boxFilter()
cv2.boxPoints()
cv2.buildOpticalFlowPyramid() # 构建光流金字塔
cv2.BackgroundSubtractor # 类，视频背景检测
cv2.BackgroundSubtractor.apply()
cv2.BackgroundSubtractor.clear
cv2.BackgroundSubtractor.empty()
cv2.BackgroundSubtractor.getBackgroundImage()
cv2.BackgroundSubtractor.getDefaultName()
cv2.BackgroundSubtractor.mro()
cv2.BackgroundSubtractor.read()
cv2.BackgroundSubtractor.save()
cv2.BackgroundSubtractor.write()
cv2.BackgroundSubtractorKNN #类
cv2.BackgroundSubtractorKNN.apply()
cv2.BackgroundSubtractorKNN.clear()
cv2.BackgroundSubtractorKNN.empty()
cv2.BackgroundSubtractorKNN.getBackgroundImage()
cv2.BackgroundSubtractorKNN.getDefaultName()
cv2.BackgroundSubtractorKNN.getDetectShadows()
cv2.BackgroundSubtractorKNN.getDist2Threshold()
cv2.BackgroundSubtractorKNN.getHistory()
cv2.BackgroundSubtractorKNN.getkNNSamples()
cv2.BackgroundSubtractorKNN.getShadowThreshold()
cv2.BackgroundSubtractorKNN.getShadowValue()
cv2.BackgroundSubtractorKNN.mro()
cv2.BackgroundSubtractorKNN.read()
cv2.BackgroundSubtractorKNN.save()
cv2.BackgroundSubtractorKNN.setDetectShadows()
cv2.BackgroundSubtractorKNN.setDist2Threshold()
cv2.BackgroundSubtractorKNN.setHistory()
cv2.BackgroundSubtractorKNN.setkNNSamples()
cv2.BackgroundSubtractorKNN.setNSamples()
cv2.BackgroundSubtractorKNN.setShadowThreshold()
cv2.BackgroundSubtractorKNN.setShadowValue()
cv2.BackgroundSubtractorKNN.write()
cv2.BackgroundSubtractorMOG2
cv2.BaseCascadeClassifier
cv2.BFMatcher # 类。Brute-Force图像特征特征匹配
cv2.BFMatcher_create()
cv2.BFMatcher.match()
cv2.BOWImgDescriptorExtractor
cv2.BOWKMeansTrainer
cv2.BOWTrainer
cv2.BRISK
cv2.BRISK_create()

cv2.calcBackProject() # 在HSV色彩空间中，直方图反向投影。可用于检测目标
cv2.calcCovarMatrix()
cv2.calcHist() # 计算图像的直方图
cv2.calcOpticalFlowFarneback()
cv2.calcOpticalFlowPyrLK() # Lucas-Kanade光流算法
cv2.calibrateCamera() # 相机校正
cv2.calibrateCameraExtended()
cv2.calibrateCameraRO()
cv2.calibrateCameraROExtended()
cv2.calibrateHandEye()
cv2.calibrationMatrixValues() # 从相机矩阵中计算相机特征
cv2.cartToPolar()
cv2.checkChessboard()
cv2.checkHardwareSupport()
cv2.checkRange()
cv2.circle() # 画圆
cv2.clipLine()
cv2.CLAHE() # CLAHE直方图均衡化
cv2.colorChange()
cv2.compare()
cv2.compareHist() # 比较两个图像的直方图。可用于两个图像之间的相似性
cv2.completeSymm()
cv2.composeRT() # 旋转和平移变换的组合
cv2.computeCorrespondEpilines()
cv2.computeECC()
cv2.connectedComponents() # 图像的连通区域
cv2.connectedComponentsWithAlgorithm()
cv2.connectedComponentsWithStats()
cv2.connectedComponentsWithStatsWithAlgorit