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EscVM / OIDv4_ToolKit

Download and visualize single or multiple classes from the huge Open Images v4 dataset
GNU General Public License v3.0
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Annotation bounding box coordinates with invalid values? #33

Closed monocongo closed 5 years ago

monocongo commented 5 years ago

I have downloaded images and label files for an image class, and I'm wondering if maybe I've done something to monkey with the bounding box coordinates in the label *.txt files.

For example, I have a label file (0a7df07bbac03159.txt) with the following contents:

Sword 14.72 7.68 669.44 767.360256

My understanding from the README is that the annotation bounding box coordinates should be within the normalized range [0, 1], but that's obviously not what I'm getting in my label files, as seen above.

Can anyone comment as to how I should interpret the bounding box values in the *.tx files, and/or what I've done wrong to get values that appear to be outside the expected range? Are the float values present in these files computed from the original/normalized bounding box values against the height/width of the corresponding image, and if I want to have the actual integer pixel numbers for the bounding box then I can just round these to the nearest integer? For example, the bounding box for the above would be (left_x=15, top_y=8, right_x=669, bottom_y=767)?

Thanks in advance for any comments or suggestions.

EscVM commented 5 years ago

Hi @monocongo!

You are right, the description is not anymore correct. Those are the values computed from the normalized images and so, as you wrote, the corresponding rounded values are (left_x=15, top_y=8, right_x=669, bottom_y=767).

monocongo commented 5 years ago

Thanks @EscVM !