from imutils import perspective from imutils import contours import cv2 import numpy as np import imutils #红色轮廓线,黄色最小外接矩形 cam = True cap = cv2.VideoCapture(1) # 视频捕获 打开摄像头 cap.set(3, 960) # 3序号 视频流的帧的宽度960 cap.set(4, 540) # 4序号 视频流的帧的高度540...
# 对轮廓中,根据点的x坐标对点进行排序,使其以左上、右上、右下和左下的顺序出现,然后绘制旋转边界的轮廓 # box return the coordinates in top-left, top-right,bottom-right, and bottom-left order box = perspective.order_points(box) cv2.drawContours(orig, [box.astype("int")], -1, (0, 255,...
为了处理这个问题,我们需要使用更合理的数学原理设计一个更好的order_points函数。这正是我们下面要讲的内容。 顺时针排列坐标的更好方法 我们将要介绍的,新的,没有bug的order_points函数的实现可以在imutils包中找到,确切的说是在perspective.py文件中(这个包应该是作者自己发布的,里面包含的是一系列方便的,作者自己...
# order the points in the contour such that they appear # in top-left, top-right, bottom-right, and bottom-left # order, then draw the outline of the rotated bounding rect = perspective.order_points(box) # compute the center of the bounding box cX = int(np.average(box[ :, 0 ])...
cv2.imshow('Circled corner points', img_resize) cv2.waitKey(0) 左右滑动查看完整代码 对调整后的RGB图像圈出几个角。 检测到文档之后,现在需要从图像中提取文档。 使用扭曲透视获得所需的图像 扭曲透视(warp perspective)是一种计算机视觉技术,用于转换图像以纠正失真。它将图像转换成不同的平面,让您可以从不...
getPerspectiveTransform(rect, dst) warped = cv2.warpPerspective(image, M, (maxWidth, maxHeight)) return warped # 返回变换后结果 def sort_contours(cnts, method="left-to-right"): reverse = False i = 0 if method == "right-to-left" or method == "bottom-to-top": reverse = True if ...
M = cv2.getPerspectiveTransform(rect, dst) # 进行仿射变换 warped = cv2.warpPerspective(image, M, (maxWidth, maxHeight)) # 返回变换后的结果 return warped if __name__ == '__main__': image = cv2.imread("2.jpg") canny = cv2.Canny(image,50,150,3) cv2.imshow("1",canny) #寻找轮...
float32) M = cv2.getPerspectiveTransform(org,dst) res = cv2.warpPerspective(img,M,(w,h)) return getpilimage(res) Example #21Source File: perspective.py From imutils with MIT License 5 votes def four_point_transform(image, pts): # obtain a consistent order of the points and unpack ...
In order to apply a perspective transformation, we need to know the top-left, top-right, bottom-right, and bottom-left corners of the contour. However, just because we have the contour that corresponds to the Game Boy screen, we have no guarantee of theorderof the points. There is no ...
(Python's perspective) Anything that can be passed to the built-in iter function to get an iterator from it. If you're inventing your own iterable class, also see How to make an iterable. Data Types These terms are related to fundamental "data types" in Python. String Strings are a da...