# import matplotlib        # only mac, if plotting doesn't work otherwise
# matplotlib.use("TkAgg")  # only mac, if plotting doesn't work otherwise

import matplotlib.pyplot as plt
import numpy as np

data = plt.imread("plastic.jpg").copy()
print(type(data))

print(data.shape)
print(data.dtype) # unit8 # 8-bit unsigned integer # 2^8 #  0..255

#print(data)

#plt.subplot(221)
#plt.imshow(data[:, :, 0])

#plt.subplot(222)
#plt.imshow(data[:, :, 1])

#plt.subplot(223)
#plt.imshow(data[:, :, 2])

#plt.subplot(224)



#data[:,:,0] = 0
#data[500:1500, 1500:3000] = [0, 0, 255]

red = data[:, :, 0]
green = data[:, :, 1]
blue = data[:, :, 2]

print(red < 100)

data[ (blue < 100) | (red > 100) ] = 0

plt.imshow(data)
plt.show()