opencv_tutorial_01.py

import imutils
import cv2

image = cv2.imread("jp.png")
(h, w, d) = image.shape
print("width={}, height={}, depth={}".format(w, h, d))

(B, G, R) = image[100, 50]
print("R={}, G={}, B={}".format(R, G, B))

roi = image[60:160, 320:420]
cv2.imshow("ROI", roi)

resized = cv2.resize(image, (200, 200))
cv2.imshow("Fixed Resizing", resized)

r = 300 / w
dim = (300, int(h*r))
resizedAspectRatio = cv2.resize(image, dim)
cv2.imshow("Aspect Ratio Resize", resizedAspectRatio)

resizeAuto = imutils.resize(image, width=300)
cv2.imshow("Auto Resize", resizeAuto)

center = (w // 2, h // 2)
M = cv2.getRotationMatrix2D(center, -45, 1.0)
rotated = cv2.warpAffine(image, M, (w, h))
cv2.imshow("OpenCV Rotation", rotated)

autoRotated = imutils.rotate(image, -45)
cv2.imshow("Imutils Rotation", autoRotated)

rotateWithOutCrop = imutils.rotate_bound(image, 45)
cv2.imshow("Rotate with out cropping", rotateWithOutCrop)

blurred = cv2.GaussianBlur(image, (11, 11), 0)
cv2.imshow("Blurred", blurred)

output = image.copy()
cv2.rectangle(output, (320, 60), (420, 160), (0, 0, 255), 2)
cv2.imshow("Rectangle", output)

outputCircle = image.copy()
cv2.circle(outputCircle, (300, 150), 20, (255, 0, 0), -1)
cv2.imshow("Circle", outputCircle)

outputLine = image.copy()
cv2.line(outputLine, (60, 20), (400, 200), (0, 0, 255), 5)
cv2.imshow("Line", outputLine)

outputText = image.copy()
cv2.putText(outputText, "OpenCV + Jurassic Park!!!", (10, 25), 
	cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 255, 0), 2)
cv2.imshow("Text", outputText)

cv2.imshow("Image", image)
cv2.waitKey(0)