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November 14, 2020 09:17
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Plots image profile, horizontal and vertical (full or from point to point)
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def pltImgProfile(img_gray, pt1=None, pt2=None): | |
"""Plots image profile (x and y) | |
Parameters | |
---------- | |
img_gray : np.array | |
image (grayscale) | |
pt1 : tuple | |
coordinates of first point (row1, col1) | |
pt2 : tuple | |
coordinates of second point (row2, col2) | |
Returns | |
------- | |
fig : matplotlib figure | |
projection of histograms | |
Requires | |
------- | |
numpy, matplotlib | |
Example | |
------- | |
# full profile | |
my_fig = pltImgProfile(img_gray, (0,0), (img_gray.shape[0],img_gray.shape[-1])) | |
# from point p1 to point p2 | |
my_fig = pltImgProfile(img_gray, (50,50), (100,100)) | |
""" | |
# horizontal | |
cols = np.arange(pt1[-1],pt2[-1]) | |
hor_proj = np.sum(img_gray[:,pt1[-1]:pt2[-1]],axis = 0) | |
# vertical | |
rows = np.arange(pt1[0],pt2[0]) | |
vert_proj = np.sum(img_gray[pt1[0]:pt2[0],:],axis = 1) | |
fig, axs = plt.subplots(2, 1) | |
axs[0].plot(cols, hor_proj) | |
axs[0].title.set_text('Horizontal Profile') | |
axs[1].plot(rows, vert_proj) | |
axs[1].title.set_text('Vertical Profile') | |
plt.tight_layout() | |
return fig |
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