OpenCV cheat sheet

image I/O

cv2.imread()

Syntax: cv2.imread(path, flag)

Parameters:

1. path
2. flag: It specifies the way in which image should be read. It’s default value is cv2.IMREAD_COLOR

cv2.IMREAD_COLOR:It specifies to load a color image, default flag, alternatively, we can pass 1 for this flag.

cv2.IMREAD_GRAYSCALE: It specifies to load an image in grayscale mode. Alternatively pass value 0.

cv2.IMREAD_UNCHANGED: It specifies to load an image including alpha channel.

Return Value: returns an image

image basic operation

rotate cv2.rotate()

Syntax: cv2.rotate(src, rotateCode)

Parameters:

1. src: t is the image whose color space is to be changed

2. rotateCode: It is an enum to specify how to rotate the array.

• cv2.ROTATE_()_CLOCKWISE
• cv2.ROTATE_()_COUNTERCLOCKWISE
• cv2.ROTATE_180

Return value: It returns an image