How to convert to other classes (ex: traffic light, traffic signs)

[MarceloContreras]

Has somebody successfully converted cityscapes dataset filtering classes such as traffic lights, poles, etc? Indeed, I did the change of desired classes in category_instancesonly and also commented on the invalid contour warning. However, even if I did that, I still get .json output files with 0 annotations.

[aitor-martinez-seras]

The problem is that instanceIds images, where the different instances are labeled, do not have the labels for traffic lights, traffic signs, etc... They only have the categories used in this repo. Therefore it is not possible to extract those classes' ground truth for 2d bboxes.

[TillBeemelmanns]

The annotated classes in Cityscapes are shown here https://github.com/mcordts/cityscapesScripts/blob/master/cityscapesscripts/helpers/labels.py#L88

As already pointed out. Traffic light and traffic signs do not have instance annotations.