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import cv2
import numpy as np
from matplotlib import pyplot as plt
import os
# make_edges reads an image from /pfs/images and outputs the result of running
# edge detection on that image to /pfs/out. Note that /pfs/images and
# /pfs/out are special directories that Pachyderm injects into the container.
def make_edges(image):
img = cv2.imread(image)
tail = os.path.split(image)[1]
edges = cv2.Canny(img,100,200)
plt.imsave(os.path.join("/pfs/out", os.path.splitext(tail)[0]+'.png'), edges, cmap = 'gray')
# walk /pfs/images and call make_edges on every file found
for dirpath, dirs, files in os.walk("/pfs/images"):
for file in files:
make_edges(os.path.join(dirpath, file))
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