Mask_rcnn: Load Validation Dataset there is a mistake and how to solve it

[chrispolo]

loading annotations into memory...

FileNotFoundError Traceback (most recent call last)
in ()
5 elif config.NAME == "coco":
6 dataset = coco.CocoDataset()
----> 7 dataset.load_coco(COCO_DIR, "minival")
8
9 # Must call before using the dataset

~/Downloads/mrcnn_test/coco.py in load_coco(self, dataset_dir, subset, year, class_ids, class_map, return_coco, auto_download)
106 self.auto_download(dataset_dir, subset, year)
107
--> 108 coco = COCO("{}/annotations/instances_{}{}.json".format(dataset_dir, subset, year))
109 if subset == "minival" or subset == "valminusminival":
110 subset = "val"

~/Downloads/mrcnn_test/pycocotools/coco.py in __init__(self, annotation_file)
77 print('loading annotations into memory...')
78 tic = time.time()
---> 79 dataset = json.load(open(annotation_file, 'r'))
80 assert type(dataset)==dict, 'annotation file format {} not supported'.format(type(dataset))
81 print('Done (t={:0.2f}s)'.format(time.time()- tic))

FileNotFoundError: [Errno 2] No such file or directory: '~/Downloads/mrcnn_test/coco/annotations/instances_minival2014.json'
# I just begin to test it,so can you help me to solve this problem?

[fastlater]

@chrispolo the script cannot find the json file called instances_minival2014.json.
Please check the path. If you don't have the file, you have to download it and place it in the right folder.

[chrispolo]

@fastlater Thank you,fastlater! I had download the instances_minival2014.json and instances_valminusminival2014.json , i add the path to the inspect_model.ipynb like this

MS COCO Dataset

import coco config = coco.CocoConfig() COCO_DIR = "/home/Downloads/mrcnn_test/coco"
the coco is the folder,but when i run it in the jupyter notebook, there is still a mistake.
The mistake ie like this `FileNotFoundError Traceback (most recent call last)
in ()
5 elif config.NAME == "coco":
6 dataset = coco.CocoDataset()
----> 7 dataset.load_coco(COCO_DIR, "minival")
8
9 # Must call before using the dataset

~/Downloads/mrcnn_test/coco.py in load_coco(self, dataset_dir, subset, year, class_ids, class_map, return_coco, auto_download)
106 self.auto_download(dataset_dir, subset, year)
107
--> 108 coco = COCO("{}/annotations/instances_{}{}.json".format(dataset_dir, subset, year))
109 if subset == "minival" or subset == "valminusminival":
110 subset = "val"

~/Downloads/mrcnn_test/pycocotools/coco.py in __init__(self, annotation_file)
77 print('loading annotations into memory...')
78 tic = time.time()
---> 79 dataset = json.load(open(annotation_file, 'r'))
80 assert type(dataset)==dict, 'annotation file format {} not supported'.format(type(dataset))
81 print('Done (t={:0.2f}s)'.format(time.time()- tic))

FileNotFoundError: [Errno 2] No such file or directory: '/home/Downloads/mrcnn_test/coco/annotations/instances_minival2014.json'`
Would you help solve this ? Thank you very much.

[fastlater]

Try to use the absolute path and you will have no error if the file exist in the annotations folder.

[chrispolo]

@fastlater i got it ,thx