aakaashvp / Color-Conversion

Ex no: 3

Date: 29.03.2023

Color Conversion

AIM

To perform the color conversion between RGB, BGR, HSV, and YCbCr color models.

Software Required:

Anaconda - Python 3.7

Algorithm:

Step1:

Read an image using imread() and Convert BGR and RGB to HSV and GRAY using:
cv2.cvtColor(image,cv2.COLOR_RGB2HSV)
cv2.cvtColor(image,cv2.COLOR_RGB2GRAY)
cv2.cvtColor(image,cv2.COLOR_BGR2HSV)
cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)

Step2:

Convert HSV to RGB and BGR using:
cv2.cvtColor(image,cv2.COLOR_HSV2RGB)
cv2.cvtColor(image,cv2.COLOR_HSV2BGR)

Step3:

Convert RGB and BGR to YCrCb using:
cv2.cvtColor(image,cv2.COLOR_RGB2YCrCb)
cv2.cvtColor(image,cv2.COLOR_BGR2YCrCb)

Step4:

Split and Merge RGB Image using:
blue = image[:,:,0]
green = image[:,:,1]
red = image[:,:,2]
cv2.merge((blue,green,red))

Step5:

Split and merge HSV Image using:
hsv=cv2.cvtColor(image,cv2.COLOR_BGR2HSV)
h, s, v = cv2.split(hsv)
cv2.merge((h,s,v))

Program:

# Developed By:AAKAASH V P
# Register Number:21222023001
# i) Convert BGR and RGB to HSV and GRAY

import cv2
image=cv2.imread('1.jpg')
hsv_img = cv2.cvtColor(image, cv2.COLOR_BGR2HSV)
cv2.imshow('BGR2HSV',hsv_img)
hsv1_img = cv2.cvtColor(image, cv2.COLOR_RGB2HSV)
cv2.imshow('RGB2HSV',hsv1_img)
gray_img = cv2.cvtColor(image, cv2.COLOR_RGB2GRAY)
gray1_img = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
cv2.imshow('RGB2GRAY',gray_img)
cv2.imshow('BGR2GRAY',gray1_img )
cv2.waitKey(0)
cv2.destroyAllWindows



# ii)Convert HSV to RGB and BGR

import cv2
image=cv2.imread('1.jpg')
hsv_img = cv2.cvtColor(image, cv2.COLOR_BGR2HSV)
cv2.imshow('BGR2HSV',hsv_img)
hsv1_img = cv2.cvtColor(hsv_img, cv2.COLOR_HSV2RGB)
cv2.imshow('HSV2RGB',hsv1_img)
hsv2_img = cv2.cvtColor(image, cv2.COLOR_HSV2BGR)
cv2.imshow('RGB2GRAY',hsv2_img)
cv2.waitKey(0)
cv2.destroyAllWindows


# iii)Convert RGB and BGR to YCrCb

RGB_YCrCb=cv2.cvtColor(image,cv2.COLOR_RGB2YCrCb)
cv2.imshow("RGB_YCrCb_IMAGE",RGB_YCrCb)
BGR_YCrCb=cv2.cvtColor(image,cv2.COLOR_BGR2YCrCb)
cv2.imshow("BGR_YCrCb_IMAGE",BGR_YCrCb)
cv2.waitKey(0)



# iv)Split and Merge RGB Image

blue = image[:,:,0]
cv2.imshow("blue",blue)
green = image[:,:,1]
cv2.imshow("green",green)
red = image[:,:,2]
cv2.imshow("red",red)
merged=cv2.merge((blue,green,red))
cv2.imshow("merged",merged)
cv2.waitKey(0)



# v) Split and merge HSV Image

hsv=cv2.cvtColor(image,cv2.COLOR_BGR2HSV)
cv2.imshow("ORIGINAL HSV_IMAGE",hsv)
h, s, v = cv2.split(hsv)
cv2.imshow('h_plane', h)
cv2.imshow('s_plane', s)
cv2.imshow('v_plane', v)
mergedhsv=cv2.merge((h,s,v))
cv2.imshow('merged',mergedhsv)
cv2.waitKey(0)

Output:

i) BGR and RGB to HSV and GRAY

|

ii) HSV to RGB and BGR

iii) RGB and BGR to YCrCb

iv) Split and merge RGB Image

v) Split and merge HSV Image

Result:

Thus the color conversion was performed between RGB, HSV and YCbCr color models.