用途

在图像处理中，伪色彩用途广泛。在OpenCV库中，常见的伪色彩模式都可通过 cv2.applyColorMap(src, userColor[, dst]) 直接调用，很是方便快捷。例如伪色彩中的 COLORMAP_JET模式，就常被用于生成我们所常见的 热力图：

Syntax

cv2.applyColorMap(src, userColor[, dst])

Args:

• COLORMAP_AUTUMN = 0
• COLORMAP_BONE = 1
• COLORMAP_JET = 2
• COLORMAP_WINTER = 3
• COLORMAP_RAINBOW = 4
• COLORMAP_OCEAN = 5
• COLORMAP_SUMMER = 6
• COLORMAP_SPRING = 7
• COLORMAP_COOL = 8
• COLORMAP_HSV = 9
• COLORMAP_PINK = 10
• COLORMAP_HOT = 11

Demo
原图：

伪色彩图：

COLORMAP_AUTUMN = 0：

COLORMAP_BONE = 1：

COLORMAP_JET = 2：

COLORMAP_WINTER = 3：

COLORMAP_RAINBOW = 4：

COLORMAP_OCEAN = 5：

COLORMAP_SUMMER = 6：

COLORMAP_SPRING = 7：

COLORMAP_COOL = 8：

COLORMAP_HSV = 9：

COLORMAP_PINK = 10：

COLORMAP_HOT = 11：

12：

Code

附上自己写的实验代码：

import cv2

# COLORMAP_AUTUMN = 0,
# COLORMAP_BONE = 1,
# COLORMAP_JET = 2,
# COLORMAP_WINTER = 3,
# COLORMAP_RAINBOW = 4,
# COLORMAP_OCEAN = 5,
# COLORMAP_SUMMER = 6,
# COLORMAP_SPRING = 7,
# COLORMAP_COOL = 8,
# COLORMAP_HSV = 9,
# COLORMAP_PINK = 10,
# COLORMAP_HOT = 11

img = cv2.imread("girl.jpg")
for i in range(0, 13):
    im_color = cv2.applyColorMap(img, i)
    cv2.imwrite("{}.jpg".format(i), im_color)