python simGetImages API bug

[flyers]

I use the following code to get the segmentation image from the camera.

responses = client.simGetImages([ImageRequest("0", airsim.ImageType.Segmentation, False, False)])
response = responses[0]

# get numpy array
img1d = np.fromstring(response.image_data_uint8, dtype=np.uint8) 

# reshape array to 4 channel image array H X W X 4
img_rgba = img1d.reshape(response.height, response.width, 4)  

However, the following error happens very randomly.

ValueError: cannot reshape array of size 1 into shape (0,0,4)

It seems that sometimes the returned response will have zero height and width and the data only have a length of 1.
Similar problems have been reported in #1710.
I believe it's a serious bug in the simGetImages API.

[srivatsankrishnan]

@flyers @sytelus I am seeing this issue too. But I do have a workaround for this issue. I have a try and except before the simGetImages call. On exception, I try to reset AirSim and pass the dummy image. Something like this:

try:
   image = client.simGetImage(....)
except Exception as e:
    client.reset()
     image = np.ones(image.shape)

I have seen this workaround recovering from that error. But this is definitely a hack and it would be great if this is fixed in AirSim.

[gurkanctn]

Until a permanent solution is found, another workaround can be using an if statement to check for the length of the response, and only try reshaping if it passes the test. This might be faster than the try-catch (to be confirmed).

[annisanazi]

did anyone resolve this issue?

[rallen10]

I am still facing this issue! There are many more issues like this open and the ones that are closed are only closed because someone recommended the if statement workaround. Can we get a higher priority on this?