ValueError: cannot reshape array of size 0 into shape (0,newaxis,2)

[MritulaC]

in normalise_data d2 = d2.reshape(d2.shape[0], -1, 2).transpose(0, 2, 1) ValueError: cannot reshape array of size 0 into shape (0,newaxis,2)

Hi, I am getting the above error when giving a jpeg image for reconstruction. How am I to overcome this error?# Thanks, Mritula

[DenisTome]

That means that for that specific frame there are no predictions. Probably, by playing with /packages/lifting/utils/config.py VISIBLE_PART, you can find a threshold that is better for your specific images.

[MritulaC]

How to determine the maximum and minimum values for Visible part? I have given 1e-10 and 1e-20, and still the same error.

[DenisTome]

Okay that is weird. Just to be sure about it, what happens if you check the content of d2?

The way it's working right now is to have the mean(heatmap) > VISIBLE_PART https://github.com/DenisTome/Lifting-from-the-Deep-release/blob/d4f8a10a7d6887d83721cd2b24edb05056bb8a68/packages/lifting/utils/process.py#L125

you could change that to max(heatmap).

[MritulaC]

Thanks, I will check it and update you.

[MritulaC]

I did try but still, the same problem exists

[DenisTome]

so, what's the content of the variable part_hmap?

[MritulaC]

I have given print statement for part_hmap output, but the program is not priniting out the value for oid, (yc, xc) in enumerate(centers): part_hmap = skimage.transform.resize( .......... print(part_hmap)

not sure why :-(

[DenisTome]

the reason it's not printing anything is probably because it's empty. One thing you can do is to say:

if len(centers) < 1:

skip to next frame

return None, None, None

[MritulaC]

I did that and i got the following ValueError: too many values to unpack (expected 2)

len(centers) is 0.

[manjuj123]

Hi, When I run this code, I am also getting ValueError: cannot reshape array of size 0 into shape (0,newaxis,2).

The png file I am using was created using an iOS app. This app creates an image of myself as JPEG. I converted it to a png file using Preview Export option. The program works with the test_image.png.

Can you help me understand what is it that I am missing?

[DenisTome]

I've updated the code to catch that error. However in order to fix that, you need to try to change the packages/lifting/utils/config.py file, specifically CENTER_TR.

[manjuj123]

Thanks Denis. What do you suggest I change the CENTER_TR to from 0.4? Why do you suggest that I change it?

[manjuj123]

After changing the CENTER_TR to 0.2, I did manage to go past this error and get the output generated. Thanks.

[DenisTome]

Perfect. Yeah, at the end there are 2 thresholds controlling everything and by adjusting them you can control the visibility.

[MritulaC]

Thanks, I will try the same and update.