pivc2.py

import cv2
import numpy as np

im = cv2.imread('silver.jpg')

gray=cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
gray=cv2.threshold(gray,80,255,cv2.THRESH_BINARY)[1]

cv2.imshow('gray',gray)
cv2.waitKey()
contours,hierarchy = cv2.findContours(gray,cv2.RETR_LIST ,4   )
i=0
MY_COLORS={'BLUE':[255,0,0],'GREEN':[0,255,0], 'RED':[0,0,255],'LARANJA':[0,128,255],'MAR':[255,255,0],'ROSA':[255,0,255],'CINZA':[128,128,128],'AMARELO':[0,255,255],'VIOLETA':[102,0,51]}
COLORS = ['BLUE','RED','GREEN','MAR','ROSA','LARANJA','CINZA','AMARELO','VIOLETA']
for cnt in contours:
    hull= cv2.convexHull(cnt, returnPoints = False)
#    defects= cv2.convexityDefects(cnt,hull)
    (x,y),raio = cv2.minEnclosingCircle(cnt)
    center = (int(x),int(y))
    raio= int(raio)
    area = cv2.contourArea(cnt)
    #H_area = cv2.contourArea(hull)
    k = cv2.isContourConvex(cnt)
    #cv2.circle(im,center,raio,(0,255,0),2)
    print("Area",i,":" , area , "---- Convrx: " , k)
    #print("Hull Area",i,":" , H_area )
    
    cv2.drawContours(im,[cnt],0,MY_COLORS[COLORS[i]],2)
    i+=1
    if i == 8:
        i=0
#    if defects is not None:
#        for x in range(defects.shape[0]):
#            s,e,f,d = defects[x,0]
#            start = tuple(cnt[s][0])
#            end = tuple(cnt[e][0])
#            far = tuple(cnt[f][0])
#            cv2.circle(im, far, 5, [0,128,255],-1)
#            cv2.line(im, start,end,[0,255,0],2)
#            print(cv2.pointPolygonTest(cnt[0],far,True))



cv2.imshow('im',im)
cv2.waitKey()
cv2.destroyAllWindows()