Compute CTC targets failed!

[bigkun]

1. i used lstmbox to get box file (my.Font.box) with some images(my.Font.tif).

2. using jTessBoxEditor to finetune the box file.

3. lstm.train get lstmf file (my.Font.lstmf)

 

lstmtraining \

 --model_output ./out/finetune \

 --continue_from ./best_eng.lstm \              # combine_tessdata from best eng.traineddata

 --traineddata ./tessdata/eng.traineddata \ # the best eng.traineddata

 --train_listfile ./eng.training_files.txt \       # path to  my.Font.lstmf

 --target_error_rate 0.001 \

 &> ./out/training.log

 

The training proccess goes well, but it reports  'Compute CTC targets failed!' errors  in the log message.

Loaded file ./best_eng.lstm, unpacking...

Warning: LSTMTrainer deserialized an LSTMRecognizer!

Continuing from ./best_eng.lstm

Loaded 213/213 lines (1-213) of document /home/image/tesseract_demo/4.0/tesstutorial/fine_tune_base_eng/exp1-base_image_box/eng.Source_Code_Pro_Light.exp4.lstmf

Compute CTC targets failed!

2 Percent improvement time=24, best error was 100 @ 0

At iteration 24/100/101, Mean rms=1.089%, delta=5.67%, char train=21.769%, word train=21%, skip ratio=1%,  New best char error = 21.769 wrote best model:./exp1-base_image_box/out/finetune21.769_24.checkpoint wrote checkpoint.

2 Percent improvement time=4, best error was 21.769 @ 24

At iteration 28/200/201, Mean rms=0.699%, delta=3.184%, char train=12.003%, word train=12.5%, skip ratio=0.5%,  New best char error = 12.003 wrote best model:./exp1-base_image_box/out/finetune12.003_28.checkpoint wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=0, best error was 12.003 @ 28

At iteration 28/300/302, Mean rms=0.515%, delta=2.122%, char train=8.028%, word train=8.667%, skip ratio=0.667%,  New best char error = 8.028 Transitioned to stage 1 wrote best model:./exp1-base_image_box/out/finetune8.028_28.checkpoint wrote checkpoint.

2 Percent improvement time=0, best error was 8.028 @ 28

At iteration 28/400/402, Mean rms=0.414%, delta=1.592%, char train=6.021%, word train=6.5%, skip ratio=0.5%,  New best char error = 6.021 wrote best model:./exp1-base_image_box/out/finetune6.021_28.checkpoint wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=1, best error was 8.028 @ 28

At iteration 29/500/503, Mean rms=0.353%, delta=1.283%, char train=4.833%, word train=5.4%, skip ratio=0.6%,  New best char error = 4.833 wrote best model:./exp1-base_image_box/out/finetune4.833_29.checkpoint wrote checkpoint.

2 Percent improvement time=1, best error was 8.028 @ 28

At iteration 29/600/603, Mean rms=0.309%, delta=1.069%, char train=4.028%, word train=4.5%, skip ratio=0.5%,  New best char error = 4.028 wrote best model:./exp1-base_image_box/out/finetune4.028_29.checkpoint wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=2, best error was 6.021 @ 28

At iteration 30/700/704, Mean rms=0.279%, delta=0.923%, char train=3.464%, word train=4%, skip ratio=0.571%,  New best char error = 3.464 wrote best model:./exp1-base_image_box/out/finetune3.464_30.checkpoint wrote checkpoint.

2 Percent improvement time=2, best error was 6.021 @ 28

At iteration 30/800/804, Mean rms=0.254%, delta=0.808%, char train=3.031%, word train=3.5%, skip ratio=0.5%,  New best char error = 3.031 wrote best model:./exp1-base_image_box/out/finetune3.031_30.checkpoint wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=3, best error was 4.833 @ 29

At iteration 32/900/905, Mean rms=0.236%, delta=0.725%, char train=2.704%, word train=3.222%, skip ratio=0.556%,  New best char error = 2.704 wrote best model:./exp1-base_image_box/out/finetune2.704_32.checkpoint wrote checkpoint.

2 Percent improvement time=3, best error was 4.833 @ 29

At iteration 32/1000/1005, Mean rms=0.22%, delta=0.652%, char train=2.433%, word train=2.9%, skip ratio=0.5%,  New best char error = 2.433 wrote best model:./exp1-base_image_box/out/finetune2.433_32.checkpoint wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=1, best error was 2.433 @ 32

At iteration 33/1100/1106, Mean rms=0.12%, delta=0.09%, char train=0.265%, word train=0.9%, skip ratio=0.5%,  New best char error = 0.265 wrote best model:./exp1-base_image_box/out/finetune0.265_33.checkpoint wrote checkpoint.

2 Percent improvement time=1, best error was 2.433 @ 32

At iteration 33/1200/1206, Mean rms=0.095%, delta=0.021%, char train=0.041%, word train=0.5%, skip ratio=0.5%,  New best char error = 0.041 wrote best model:./exp1-base_image_box/out/finetune0.041_33.checkpoint wrote checkpoint.

Compute CTC targets failed!

At iteration 35/1300/1307, Mean rms=0.09%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

At iteration 35/1400/1407, Mean rms=0.085%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

At iteration 36/1500/1508, Mean rms=0.081%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

At iteration 36/1600/1608, Mean rms=0.079%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

At iteration 37/1700/1708, Mean rms=0.076%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.4%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

At iteration 37/1800/1809, Mean rms=0.074%, delta=0.027%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

At iteration 38/1900/1909, Mean rms=0.071%, delta=0.023%, char train=0.049%, word train=0.6%, skip ratio=0.4%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

At iteration 39/2000/2010, Mean rms=0.07%, delta=0.024%, char train=0.057%, word train=0.7%, skip ratio=0.5%,  New worst char error = 0.057 wrote checkpoint.

At iteration 39/2100/2110, Mean rms=0.067%, delta=0.019%, char train=0.049%, word train=0.6%, skip ratio=0.4%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

At iteration 41/2200/2211, Mean rms=0.068%, delta=0.025%, char train=0.065%, word train=0.8%, skip ratio=0.5%,  New worst char error = 0.065 wrote checkpoint.

At iteration 41/2300/2311, Mean rms=0.064%, delta=0.019%, char train=0.049%, word train=0.6%, skip ratio=0.4%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

At iteration 43/2400/2412, Mean rms=0.065%, delta=0.023%, char train=0.065%, word train=0.8%, skip ratio=0.5%,  New worst char error = 0.065 wrote checkpoint.

At iteration 43/2500/2512, Mean rms=0.063%, delta=0.018%, char train=0.056%, word train=0.7%, skip ratio=0.4%,  New worst char error = 0.056 wrote checkpoint.

Compute CTC targets failed!

At iteration 44/2600/2613, Mean rms=0.063%, delta=0.021%, char train=0.065%, word train=0.8%, skip ratio=0.5%,  New worst char error = 0.065 wrote checkpoint.

At iteration 44/2700/2713, Mean rms=0.061%, delta=0.016%, char train=0.056%, word train=0.7%, skip ratio=0.5%,  New worst char error = 0.056 wrote checkpoint.

Compute CTC targets failed!

At iteration 44/2800/2814, Mean rms=0.061%, delta=0.016%, char train=0.065%, word train=0.8%, skip ratio=0.5%,  New worst char error = 0.065 wrote checkpoint.

At iteration 44/2900/2914, Mean rms=0.059%, delta=0.013%, char train=0.056%, word train=0.7%, skip ratio=0.5%,  New worst char error = 0.056 wrote checkpoint.

Compute CTC targets failed!

At iteration 44/3000/3015, Mean rms=0.058%, delta=0.012%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

At iteration 44/3100/3115, Mean rms=0.057%, delta=0.012%, char train=0.049%, word train=0.6%, skip ratio=0.5%,  New worst char error = 0.049 wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=12, best error was 2.433 @ 32

At iteration 44/3200/3216, Mean rms=0.054%, delta=0.006%, char train=0.033%, word train=0.4%, skip ratio=0.5%,  New best char error = 0.033 wrote best model:./exp1-base_image_box/out/finetune0.033_44.checkpoint wrote checkpoint.

At iteration 44/3300/3316, Mean rms=0.054%, delta=0.006%, char train=0.033%, word train=0.4%, skip ratio=0.5%,  wrote checkpoint.

Compute CTC targets failed!

2 Percent improvement time=12, best error was 2.433 @ 32

At iteration 44/3400/3417, Mean rms=0.051%, delta=0.002%, char train=0.017%, word train=0.2%, skip ratio=0.5%,  New best char error = 0.017 wrote best model:./exp1-base_image_box/out/finetune0.017_44.checkpoint wrote checkpoint.

At iteration 44/3500/3517, Mean rms=0.05%, delta=0.002%, char train=0.017%, word train=0.2%, skip ratio=0.5%,  wrote checkpoint.

2 Percent improvement time=12, best error was 2.433 @ 32

At iteration 44/3600/3617, Mean rms=0.049%, delta=0%, char train=0.008%, word train=0.1%, skip ratio=0.4%,  New best char error = 0.008 wrote best model:./exp1-base_image_box/out/finetune0.008_44.checkpoint wrote checkpoint.

Compute CTC targets failed!

At iteration 44/3700/3718, Mean rms=0.048%, delta=0%, char train=0.008%, word train=0.1%, skip ratio=0.5%,  wrote checkpoint.

2 Percent improvement time=12, best error was 2.433 @ 32

At iteration 44/3800/3818, Mean rms=0.047%, delta=0%, char train=0%, word train=0%, skip ratio=0.4%,  New best char error = 0 wrote best model:./exp1-base_image_box/out/finetune0_44.checkpoint wrote checkpoint.

Finished! Error rate = 0