anno_coco2voc.py create many empty folder

[hpzhang]

when convert coco annotation json file to VOC xml files，create many empty folder ,why?

[Akash]

any update on this?? facing the same issue.

[Zong Fan]

Check your json annotation file. It should be like instances_train2014.json downloaded from 2014 Train/Val annotations [241MB] and make sure your download is complete. @huipengzhang @AlgorTroy

[Miles Porter]

Not sure if this is you, but I was attempting to run the script with Python 3.6. When I converted back to Python 2.7, everything seemed to work... at least it created files. :)

[hpzhang]

Thank you very much !It's ok now! @CasiaFan @fractalbass

[KFTEC-JunYS]

I was facing the same issue. So I solved as below.

def parse_instance(content, outdir):
categories = {d['id']: d['name'] for d in content['categories']}

# merge images and annotations: id in images vs image_id in annotations
merged_info_list = map(cytoolz.merge, cytoolz.join('id', content['images'], 'image_id', content['annotations']))

list = [] // added this_1

# convert category id to name
for instance in merged_info_list:
    instance['category_id'] = categories[instance['category_id']]
    list.append(instance) // added this_2

# group by filename to pool all bbox in same file
for name, groups in cytoolz.groupby('file_name', list).items(): // modified to list

[devvikas]

Modified the following function. It works now coco2017

def parse_keypoints(content, outdir):
    keypoints = dict(zip(range(1, len(content['categories'][0]['keypoints'])+1), content['categories'][0]['keypoints']))
    merged_info_list = list(map(cytoolz.merge, cytoolz.join('id', content['images'], 'image_id', content['annotations'])))
    # convert category name to person
    print('keypoints ', keypoints)
    for keypoint in merged_info_list:
        keypoint['category_id'] = "person"
    # group by filename to pool all bbox and keypoint in same file
    for name, groups in cytoolz.groupby('file_name', merged_info_list).items():
        print(name)
        filename = os.path.join(outdir, os.path.splitext(name)[0]+".xml")
        anno_tree = keypoints2xml_base(groups[0])
        for group in groups:
            anno_tree = keypoints2xml_object(group, anno_tree, keypoints, bbox_type="xyxy")
            # anno_tree.append(keypoints2xml_object(group, anno_tree, keypoints, bbox_type="xyxy"))
        etree.ElementTree(anno_tree).write(filename, pretty_print=True)
        print("Formating keypoints xml file {} done!".format(name))