Computer Vision: Colors detection in OpenCV & Python (Assemtica Didactic series)

Computer Vision: Colors detection in OpenCV & Python (Assemtica Didactic series)

[ozlen]

the code but just for red;


import cv2
import numpy as np
import imutils

cap= cv2.VideoCapture(0)
cap.set(3, 640)
cap.set(4, 480)

while True:
_, frame= cap.read()

hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

lower_red = np.array([0, 50, 120])
upper_red = np.array([10, 255, 255])

mask = cv2.inRange(hsv, lower_red, upper_red)

cnts = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
cnts = imutils.grab_contours(cnts)

for c in cnts:
area = cv2.contourArea(c)
if area > 5000:


cv2.drawContours(frame, [c], -1, (0, 255, 0), 3)

M = cv2.moments(c)

cx = int(M["m10"]/ M["m00"])
cy = int(M["m01"]/ M["m00"])

cv2.circle(frame, (cx, cy), 7, (255, 255, 255), -1)

cv2.imshow("result", frame)

k = cv2.waitKey(5)
if k == 27:
break

cap.release()
cv2.destroyAllWindows()

[urazeem]

nice work bro! please keep the source code in description plz

[JM_Tushe]

Esta tan perro que casi ladra. Gracias!

[AI_CANISTER]

at 4:34 you mentioned of the lighting condition .. have tried to write this same code but its not perfect as yours after brightening the light it's now

[dbsgustlr]

hello may i ask you question? I'd like to implement the corresponding coding as a Django, is there any way I can do it?

[LIMYEOWCHYE]

Hi i have an issue could you help? I want to detect black and white colours but they are too sensitive when the webcam is on. Is there any way to reduce its sensitivity? I have changed its lower and upper values many times but it does not work.

[teknolojikbirisi]

Hello sir is that any way to shown cx and cy with color text on the screen

[iHawkXJ]

can you tell how do I implement this in my video file instead of camera
?

[karanrawat]

SIR HOW TO MAKE WHEN THE OBJECTS ARE ROUND

[Wave]

Please tell me why you wrote aera >5000 !!!!

[srinidhiuttanuru]

sir getting error likr cv2.error opencv(4, 4.0) what to do tell me sir

[sixtocorralescastle]

I didn't understand why if area1>5000

[androidboy]

bhai code description me to daldete, itni akkal to har kisi me hoti hai

[robywahyudi.b]

hello, can you send me the source code ?