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Tools Documentation

generate_record_file.py

This file could generate list and record files for specified dataset.

Sample command:

python ./tools/generate_record_file.py --dataset-name voc_07_test --dataset-path ./data/VOCdevkit

im2rec.py

This file is copied MXNet project.

You could use im2rec.py to create your own record dataset in two steps.

Step 1. Make an Image List File

After you prepare the dataset, you need to make an image list file. The format is:

integer_image_index \t extra_header_width \t per_object_label_witdth \t objects_label... \t path_to_image
  1. extra_header_width represents width from itself to labels, here extra_header_width = len(extra_header_width, per_object_label_witdth) = 2.
  2. per_object_label_witdth is the label width for one object annotation, for voc dataset, it is 6 includes (x_min, y_min, x_max, y_max, cls_id, difficult).

Here is an example file (from voc07 test set):

0	2	6	47.00	239.00	194.00	370.00	11.00	0.00	7.00	11.00	351.00	497.00	14.00	0.00	./VOC2007/JPEGImages/000001.jpg
1	2	6	138.00	199.00	206.00	300.00	18.00	0.00	./VOC2007/JPEGImages/000002.jpg
2	2	6	122.00	154.00	214.00	194.00	17.00	0.00	238.00	155.00	306.00	204.00	8.00	0.00	./VOC2007/JPEGImages/000003.jpg

Step 2. Create the Record File

Sample command:

python ./tools/imrec.py list_file_path image_root_dir --no-shuffle --pack-label --num-thread 4