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Set a colormap of an image in Matplotlib
To set a colormap of an image, we can take the following steps −
- Set the figure size and adjust the padding between and around the subplots.
- Read an image from a file into an array.
- Pick one channel of your data.
- Display the data as an image, i.e., on a 2D regular raster with "hot" colormap
- Turn off the axes.
- To display the figure, use show() method.
Example
from matplotlib import pyplot as plt, image as mimg
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
img = mimg.imread('bird.jpg')
lum_img = img[:, :, 0]
plt.imshow(lum_img, cmap="hot")
plt.axis('off')
plt.show()Output
Updated on: 05-Jun-2021
2K+ Views
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