Things aren't working and I'm stuck!

[PhilippScheulen]

Repository

philipp-does-fun-hacker-stuff

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Git commit and push

• I hereby confirm that I have committed and pushed to my GitHub repository.

Task

Lab Session 2

Describe the problem (if possible)

Wrong thresholds:

Image: 28, Dice: 0.75, T=35
Image: 29, Dice: 0.65, T=41
Image: 33, Dice: 0.60, T=60
Image: 44, Dice: 0.59, T=64
Image: 46, Dice: 0.37, T=58
Image: 49, Dice: 0.80, T=46

Should be:

Image: 28, Dice: 0.75, T=35
Image: 29, Dice: 0.65, T=41
Image: 33, Dice: 0.43, T=71
Image: 44, Dice: 0.58, T=67
Image: 46, Dice: 0.08, T=75
Image: 49, Dice: 0.80, T=46

[kostrykin]

The error was in the computation of your histogram:

    h = np.zeros(255)
    for x in range(255):
        h[x]= np.sum(img8 == x)

This should be:

    h = np.zeros(256)
    for x in range(256):
        h[x]= np.sum(img8 == x)

In your implementation, the frequencies of intensity 255 were not computed, and thus not considered by your Otsu implementation.