Fail to divide circle into 8 equal parts

asked 2017-07-31 11:30:14 -0600

I was trying to write code which detects circle in a pizza and divide circles into 8 equal parts (i.e 8 equal slices angle of 45 degrees). I try using cv2.line() but it is not working.

Can anyone help me out in code to detect slices image description

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Comments

you need to detect a pizza and draw 8 slices or detect slices in a pizza ? in both cases please provide your code. and remember... cv2.line() can't cut your pizza ;-)

pklab ( 2017-07-31 12:13:35 -0600 )edit

it seems like you have already post a question about this...

LBerger ( 2017-07-31 12:37:41 -0600 )edit

I can detect a pizza but unable to draw slices. Here is my code

import cv2 import cv2.cv as cv

import numpy as np

def main():

img = cv2.imread('testpizza.png',0)



#print(img)



img = cv2.medianBlur(img,5)

cimg = cv2.cvtColor(img,cv2.COLOR_GRAY2BGR)
circles = cv2.HoughCircles(img,cv.CV_HOUGH_GRADIENT, 1, 50)


circles = np.uint16(np.around(circles))

for i in circles[0,:]:

    # draw the outer circle

    cv2.circle(cimg,(i[0],i[1]),i[2],(0,255,0),2)

    # draw the center of the circle

    cv2.circle(cimg,(i[0],i[1]),2,(0,0,255),3)



cv2.imwrite('detectedcircles',cimg)

cv2.waitKey(0)

cv2.destroyAllWindows()

Yash99 ( 2017-07-31 13:06:00 -0600 )edit

the image contains 10 slices :)

sturkmen ( 2017-07-31 13:29:44 -0600 )edit

add a comment

#include "opencv2/core.hpp" #include "opencv2/imgproc.hpp" #include "opencv2/highgui.hpp" #include <iostream> using namespace cv; int main() { int lineType = LINE_AA; // change it to LINE_8 to see non-antialiased graphics Mat image = Mat::zeros(400, 400, CV_8UC3); for(int angle = 0; angle<360; ) { Point center(200, 200); Point perimeter; int radius = 150; Scalar randomColor((rand() & 255), (rand() & 255), (rand() & 255)); ellipse( image, center, Size(radius, radius), angle, 45, 0, randomColor, 2, lineType); perimeter.x = (int)round(center.x + radius * cos(angle * CV_PI / 180.0)); perimeter.y = (int)round(center.y + radius * sin(angle * CV_PI / 180.0)); line(image, center, perimeter, randomColor, 2, lineType); angle = angle + 45; perimeter.x = (int)round(center.x + 150 * cos(angle * CV_PI / 180.0)); perimeter.y = (int)round(center.y + 150 * sin(angle * CV_PI / 180.0)); line(image, center, perimeter, randomColor, 2, lineType); imshow("slices", image); waitKey(0); } return 0; }

Fail to divide circle into 8 equal parts

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Fail to divide circle into 8 equal parts