图像处理的一些操作（2）

9. 转换类型

9.1转换成浮点数类型

dst=img_as_float(img)

9.2转换成无符号字节类型

dst1=img_as_ubyte(img)

from skimage import data,img_as_float,io
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
print(img.dtype.name)

dst=img_as_float(img)
dst1=img_as_ubyte(img)

print(dst.dtype.name)
print(img)
print(dst1.dtype.name)
print(img)

运行结果：

10.颜色空间转换

10.1RGB转GRAY

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
gray = color.rgb2gray(img)
io.imshow(gray)

运行结果：

10.2RGB转HSV

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
hsv = color.rgb2hsv(img)
io.imshow(hsv)

运行结果：

10.3RGB转LAB

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
lab = color.rgb2lab(img)
io.imshow(lab)

运行结果：

10.4HSV转RGB

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
hsv2 = color.hsv2rgb(img)
io.imshow(hsv2)

运行结果：

10.5LAB转RGB

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
lab2 = color.lab2rgb(img)
io.imshow(lab2)

运行结果：

10.6 convert_colorspace函数进行颜色转换

from skimage import io, color
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
hsv = color.convert_colorspace(img,'RGB','HSV')
io.imshow(hsv)

运行结果：

11.标签化处理图像

11.1导入模块

from skimage import io,data,color
import cv2

11.2加载图片

image = cv2.imread(r"C:\Users\song\Desktop\2.jpg")

11.3RGB图像转灰度图像

img_gray = color.rgb2gray(image)
rows,cols=img_gray.shape

11.4遍历图像

for i in range(rows):
    for j in range(cols):
        if (img_gray[i,j]<=0.5):
            img_gray[i,j]=0
        else:
            img_gray[i,j]=1

11.5打印图像并显示

print(img_gray.dtype.name)
dst=img_as_ubyte(img_gray) # 从浮点型转换成8位无符号整形
print(dst.dtype.name)
io.imshow(dst)

运行结果：

12.颜色图谱

12.1None

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap=None)

运行结果：

12.2autumn

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='autumn') # 将'autumn'作为字符串传递给cmap参数
plt.show()

运行结果：

12.3bone

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='bone')
plt.show()

运行结果：

12.4cool

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='cool')
plt.show()

运行结果：

12.5copper

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='copper')
plt.show()

运行结果：

12.6flag

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='flag')
plt.show()

运行结果：

12.7gray

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='gray')
plt.show()

运行结果：

12.8hot

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='hot')
plt.show()

运行结果：

12.9hsv

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='hsv')
plt.show()

运行结果:

12.10inferno

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='inferno')
plt.show()

运行结果：

12.11jet

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='jet')
plt.show()

运行结果：

12.12magma

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='magma')
plt.show()

运行结果：

12.13pink

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")

plt.imshow(img, cmap='pink')
plt.show()

运行结果：

12.14plasma

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='plasma')
plt.show()

运行结果：

12.15prism

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='prism')
plt.show()

运行结果：

12.16spring

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='spring')
plt.show()

运行结果：

12.17summer

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='summer')
plt.show()

运行结果：

12.18viridis

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='viridisr')
plt.show()

运行结果：

12.19winter

import matplotlib.pyplot as plt
img = io.imread(r"C:\Users\song\Desktop\2.jpg")
plt.imshow(img, cmap='winter')
plt.show()

运行结果：