COCO目标实例个数统计

instances_train2017、instances_val2017各类别实例个数统计

jq .annotations instances_train2017.json | rg '"category_id":' | awk -F '[:,]' '{cnt[$(NF-1)]+=1} END {for (i in cnt) printf("%d,%dn",i,cnt[i])}' | sort -n

index	category_id	category_name	instance_train	instance_val
0	1	person	262,465	11,004
1	2	bicycle	7,113	316
2	3	car	43,867	1,932
3	4	motorcycle	8,725	371
4	5	airplane	5,135	143
5	6	bus	6,069	285
6	7	train	4,571	190
7	8	truck	9,973	415
8	9	boat	10,759	430
9	10	traffic light	12,884	637
10	11	fire hydrant	1,865	101
11	13	stop sign	1,983	75
12	14	parking meter	1,285	60
13	15	bench	9,838	413
14	16	bird	10,806	440
15	17	cat	4,768	202
16	18	dog	5,508	218
17	19	horse	6,587	273
18	20	sheep	9,509	361
19	21	cow	8,147	380
20	22	elephant	5,513	255
21	23	bear	1,294	71
22	24	zebra	5,303	268
23	25	giraffe	5,131	232
24	27	backpack	8,720	371
25	28	umbrella	11,431	413
26	31	handbag	12,354	540
27	32	tie	6,496	254
28	33	suitcase	6,192	303
29	34	frisbee	2,682	115
30	35	skis	6,646	241
31	36	snowboard	2,685	69
32	37	sports ball	6,347	263
33	38	kite	9,076	336
34	39	baseball bat	3,276	146
35	40	baseball glove	3,747	148
36	41	skateboard	5,543	179
37	42	surfboard	6,126	269
38	43	tennis racket	4,812	225
39	44	bottle	24,342	1,025
40	46	wine glass	7,913	343
41	47	cup	20,650	899
42	48	fork	5,479	215
43	49	knife	7,770	326
44	50	spoon	6,165	253
45	51	bowl	14,358	626
46	52	banana	9,458	379
47	53	apple	5,851	239
48	54	sandwich	4,373	177
49	55	orange	6,399	287
50	56	broccoli	7,308	316
51	57	carrot	7,852	371
52	58	hot dog	2,918	127
53	59	pizza	5,821	285
54	60	donut	7,179	338
55	61	cake	6,353	316
56	62	chair	38,491	1,791
57	63	couch	5,779	261
58	64	potted plant	8,652	343
59	65	bed	4,192	163
60	67	dining table	15,714	697
61	70	toilet	4,157	179
62	72	tv	5,805	288
63	73	laptop	4,970	231
64	74	mouse	2,262	106
65	75	remote	5,703	283
66	76	keyboard	2,855	153
67	77	cell phone	6,434	262
68	78	microwave	1,673	55
69	79	oven	3,334	143
70	80	toaster	225	9
71	81	sink	5,610	225
72	82	refrigerator	2,637	126
73	84	book	24,715	1,161
74	85	clock	6,334	267
75	86	vase	6,613	277
76	87	scissors	1,481	36
77	88	teddy bear	4,793	191
78	89	hair drier	198	11
79	90	toothbrush	1,954	57

COCO目标实例个数统计

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