Focal CTC Loss for Chinese Optical Character Recognition on Unbalanced Datasets

Table 1

Dataset with unbalance ratio 100:1.

		accuracy	HF	LF
CTC		0.538	0.739	0.337
0.99	0.5	0.587	0.753	0.421
0.99	1	0.531	0.765	0.296
0.99	2	0.511	0.742	0.280
0.75	0.5	0.628	0.755	0.501
0.75	1	0.538	0.709	0.368
0.75	2	0.501	0.704	0.297
0.5	0.5	0.525	0.741	0.310
0.5	1	0.500	0.731	0.269
0.5	2	0.504	0.722	0.287
0.25	0.5	0.614	0.731	0.498
0.25	1	0.590	0.728	0.451
0.25	2	0.508	0.685	0.331