contours.py

import cv2


def getContours(img, imgContour):
    #   imgContour = img.copy()
    contours, hierarchy = cv2.findContours(img, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
    for cnt in contours:
        area = cv2.contourArea(cnt)
        print(area)
        if area > 500:
            cv2.drawContours(imgContour, cnt, -1, (255, 0, 0), 3)
            peri = cv2.arcLength(cnt, True)
            approx = cv2.approxPolyDP(cnt, 0.02 * peri, True)
            print(len(approx))
            objCor = len(approx)
            x, y, w, h = cv2.boundingRect(approx)

#            if objCor == 3:
#                objectType = "Tri"
#            elif objCor == 4:
#                aspRatio = w / float(h)
#                if aspRatio > 0.98 and aspRatio < 1.03:
#                    objectType = "Square"
#                else:
#                    objectType = "Rectangle"
#            elif objCor > 4:
#                objectType = "Circles"
#            else:
#                objectType = "None"

        cv2.rectangle(imgContour, (x, y), (x + w, y + h), (0, 255, 0), 2)
        cv2.putText(imgContour, objectType,
                    (x + (w // 2) - 10, y + (h // 2) - 10), cv2.FONT_HERSHEY_COMPLEX, 0.7,
                    (0, 0, 0), 2)