Enumeration problems in step1_preprocess.py

[apii]

I think there's an enumeration problem in the preprocessing step around line 364. Here its iterating over valid images in each block but its trying to get values using i+1 which is in fact the image id. Furthermore, it doesn't make much sense to get a cam with id i+1, rather it should get camera of img?

for id, i in enumerate(valid_ids):
            aoi_bbox = aoi_bboxs[id]
            width = aoi_bbox[1] - aoi_bbox[0]
            height = aoi_bbox[3] - aoi_bbox[2]
            cam = cams[i + 1]
            img = imgs[i + 1]