alexgkendall / SegNet-Tutorial

Files for a tutorial to train SegNet for road scenes using the CamVid dataset
http://mi.eng.cam.ac.uk/projects/segnet/tutorial.html
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Annotated Data is black #153

Open arnav2 opened 5 years ago

arnav2 commented 5 years ago

I don't get the annotated images. They just appear black ?

ianzur commented 5 years ago

Same, I would love to know what an example annotated image should look like for training on a dataset of my own.

jay-thakur commented 4 years ago

+1 . is there anyone who have annotated own image ? would love to know what tool do you use ? & how does it look like ?

svanbodegraven commented 4 years ago

Yep. Why are they black @alexgkendall

carbocation commented 4 years ago

They aren't meant to be interpreted perceptually. Each different label is assigned to a slightly different shade of black in ascending order. For example, some of the image is #010101 while other parts are #040404. These will both look black to your eyes, but you can re-color however you like and then you'll see that these different blacks are the annotations you're looking for.

image

EtagiBI commented 4 years ago

In my view, it's a VERY unclear way of annotating images.

SangamSwadiK commented 4 years ago

@carbocation Thanks for the explanation, basically, the person who did that, used the same way of annotation, but instead of using different colors for different objects , he has used different shades of black.

dancassin commented 3 years ago

I believe the reason why you're seeing black has more to do with how GitHub renders the images than the person who created them. These were likely all created with Python (or similar language) assigning a 0,1,2 etc (a different number for each appropriate class) to each pixel. If you import the images into Python and assign a cmap='gray', you'll see them more like a photo negative. image