Convert COCO categoryId into category index.
Convert COCO categoryId into category index. COCO dataset's categoryId is not continuous from 1 to number of categories. This function maps every categoryId to a number from 1 to number of categories - The result is called category index. The category index 0 is reserved for "background" class.
categoryId
category index
Get the category data by the category index
Get the category data by the category index
category index
category data
Find a COCOImage by the image id
Find a COCOImage by the image id
image id
the COCOImage with the given id
Convert the images & ground truths into ImageFeatures.
Convert the images & ground truths into ImageFeatures. The image feature is in the same format of what COCODataset.loadFromSeqFile returns