json to dataset not working

[RuijtenP]

I get an error when running labelme_json_to_dataset on my json-files.

File "...\anaconda3\envs\labelme\lib\site-packages\imgviz\color.py", line 21, in rgb2gray
assert rgb.shape[2] == 3, 'rgb shape must be (H, W, 3)'

import labelme also not working. (as expected)

So I guess my question: how to get png masks from the json files generated by labelme ?

[wkentaro]

I guess you're using gray or RGBA image instead of RGB, right?

[wkentaro]

So I guess my question: how to get png masks from the json files generated by labelme ?

Please refer to the examples.

[RuijtenP]

My utils.img_b64_to_arr command gave a (w,h,4) image, with the last dimension just being the type (uint8 in my case). So I was working with colored images, but solved it by throwing away that last "dimension":

img2 = utils.img_b64_to_arr(imageData)
img= np.zeros((1080,1920,3),np.uint8)
for i in range(1080):
    for j in range(1920):
            img[i][j]=img2[i][j][:-1]

Now it seems to be working fine.

I guess it`s the same type of problem as using gray images.

Thanks for the responses!