图像重建（侵蚀和膨胀）均提供黑色图像作为输出

由大白痴发布于 2020-05-18 17:11:09 pythonimage-processingcomputer-visionmachine-learningscikit-image

I am trying to remove the black spots from a face of this image using the erosion methods.

我已经实现了：

img = skimage.io.imread('blemish.jpeg')
img = skimage.color.rgb2gray(img)
img_inten = skimage.exposure.rescale_intensity(img,in_range=(50,100))

diliation_seed = img_inten.copy()
diliation_seed[1:-1,1:-1] = img_inten.min()
mask = img_inten

eroded_img = skimage.morphology.reconstruction(diliation_seed,mask,method='dilation')
matplotlib.pyplot.imshow(eroded_img,cmap='gray')

在两种情况下，我的输出始终都是黑色图像。这是怎么了？

AK94 2020-05-18 17:11:09 回复

rgb2gray is outputting an image as a matrix of floats, with values in [0;1]

所以rescale_intensity只是输出一个0矩阵，因为您要求的值在50到100之间，而灰色img中没有。

您可以这样解决：

import skimage
from skimage import data, exposure, img_as_float
from skimage.morphology import reconstruction
import matplotlib.pyplot as plt

img = skimage.io.imread('blemish.jpeg')
gray_img = 255*skimage.color.rgb2gray(img) # multiply by 255 to get back in the [0;255] range
img_inten = exposure.rescale_intensity(gray_img,in_range=(50,100))

diliation_seed = img_inten.copy()
diliation_seed[1:-1,1:-1] = img_inten.min()
mask = img_inten

eroded_img = reconstruction(diliation_seed,mask,method='dilation')
plt.imshow(eroded_img,cmap='gray')
plt.show()