In Colab doing image data augmentation with "imgaug" is not working as intended

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I am augmenting my image data-set which also contains key-points. For this reason I am using imgaug library. Following is the augmentation code:

kps = KeypointsOnImage(__keypoints, shape=_image.shape)

seq = iaa.Sequential([
iaa.Affine(
    scale={"x": (0.8, 1.2), "y": (0.8, 1.2)}, # scale images to 80-120% of their size, individually per axis
    translate_percent={"x": (-0.2, 0.2), "y": (-0.2, 0.2)}, # translate by -20 to +20 percent (per axis)
    rotate=(-90, 90), # rotate by -45 to +45 degrees
    order=[0, 1], # use nearest neighbour or bilinear interpolation (fast)
    cval=(0, 255),
),
iaa.Fliplr(0.5),
], random_order=True)


# Augment keypoints and images.
image_aug, kps_aug = seq(image = _image, keypoints=kps)

But while reviewing the augmented images I found following problems:

  • Some of the images doesn't come with any key-points.
  • In some augmented images key-points are going outside of images although I kept checks to block those augmented outputs to be saved where the key-points are not inside the images.

But the weird thing is that the same code when I run it on my PC it runs completely okay. But when I run it on Google-Colab it creates these unwanted outputs. Why this is happening?

keypoint data-augmentation object-detection google-colaboratory computer-vision
2 Answers

I found it was a version problem. In Colab the library imgaug comes with a version 0.2.9 but this version produces these undesired outputs. So I uninstalled this existing version and installed the version 0.4.0. Although while installation it showed the following error:

ERROR: albumentations 0.1.12 has requirement imgaug<0.2.7,>=0.2.5, but you'll have imgaug 0.4.0 which is incompatible.

But I ignored it and for me it worked fine. Following is the code to uninstall the existing version and to install the desired one:

!pip uninstall imgaug
!pip install imgaug==0.4.0

I installed the version 0.4.0 because I was working with this version on my local PC as well and it worked for me with no problem.

user_69074240

Colab comes with the imgaug version 0.2.9 but this version does not match with the albumentations requirements. I faced the same issue, used this command to rectify the error:

!pip uninstall imgaug && pip uninstall albumentations && pip install git+https://github.com/aleju/imgaug.git
user_123407240
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