这里在opencv可以直接用resize()函数既可; 2、计算梯度图像 可以直接用OpenCV里面的kernel大小为1的Sobel算子来计算。 分别计算x、y方向的梯度; Mat gx, gy; Sobel(img, gx, CV_32F, 1, 0, 1); Sobel(img, gy, CV_32F, 0, 1, 1); 1. 2. 3. 接着,用下面的公式来计算梯度的幅值g和方向theta:...
https://medium.com/featurepreneur/draw-contours-on-an-image-using-opencv-186b67f87c92 https://learnopencv.com/contour-detection-using-opencv-python-c/ https://stackoverflow.com/questions/57576686/how-to-overlay-segmented-image-on-top-of-main-image-in-python...
首先drawcontour确实为单通道图像,但是可以使用merge函数将单通道图像变成三通道彩色图,然后就可以使用上述...
OpenCV 是一个开源的计算机视觉库,其中的 drawcontour 函数可以用来绘制轮廓,并可以选择填充轮廓。在本文中,将介绍关于 Opencv 中 drawcontour 的填充算法。 在使用 drawcontour 函数时,通过传入参数来控制是否填充轮廓。当 fill 参数设置为正数时,轮廓将被填充,否则轮廓将只被绘制但不被填充。在填充轮廓时,可以选择...
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import matplotlib.pyplot as plt import numpy as np # 定义等高线高度函数 def f(x, y): r...
【OpenCV函数】轮廓提取;轮廓绘制;轮廓面积;外接矩形 2017-10-01 14:21 −FindContours 在二值图像中寻找轮廓 int cvFindContours( CvArr* image, CvMemStorage* storage, CvSeq** first_contour, int header_size=sizeof(CvC... 隔壁王叔叔a 0
6 opencv.js perspective transform 0 Opencv.js How to draw a subset of contours? Related 2 How to draw a rectangle around the contours? 14 Draw single Contour in OpenCV on image 0 OpenCV - Drawing contours as they are 0 Open cv drawing contours 0 Opencv contours 3 Getting contour...
the image a bit, then use an algorithm to find the outline (or contour) of the object of interest and collect some metrics about the object via the outline. OpenCV is ideal for this because the implementation of the Canny algorithm it uses for edge detection is excellent and incredibly ...
Unfortunately, my OpenCV is not working at the moment so I did the processing in Imagemagick. read image convert to gray threshold on white to make a mask and invert so white is black and the rest is white get the convex hull of the mask get the contour of the convex hull draw a ...