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This document gives the performance of the series models for Chinese and English recognition.
We collected 300 images for different real application scenarios to evaluate the overall OCR system, including contract samples, license plates, nameplates, train tickets, test sheets, forms, certificates, street view images, business cards, digital meter, etc. The following figure shows some images of the test set.
Explanation:
v1.0 indicates DB+CRNN models without the strategies. v1.1 indicates the PP-OCR models with the strategies and the direction classify. slim_v1.1 indicates the PP-OCR models with prunner or quantization.
The long size of the input for the text detector is 960.
The evaluation time-consuming stage is the complete stage from image input to result output, including image pre-processing and post-processing.
Intel Xeon 6148 is the server-side CPU model. Intel MKL-DNN is used in the test to accelerate the CPU prediction speed.
Snapdragon 855 is a mobile processing platform model.
Compares the model size and F-score:
| Model Name | Model Size of the Whole System(M) |
Model Size of the Text Detector(M) |
Model Size of the Direction Classifier(M) |
Model Size of the Text Recognizer (M) |
F-score |
|---|---|---|---|---|---|
| ch_ppocr_mobile_v1.1 | 8.1 | 2.6 | 0.9 | 4.6 | 0.5193 |
| ch_ppocr_server_v1.1 | 155.1 | 47.2 | 0.9 | 107 | 0.5414 |
| ch_ppocr_mobile_v1.0 | 8.6 | 4.1 | - | 4.5 | 0.393 |
| ch_ppocr_server_v1.0 | 203.8 | 98.5 | - | 105.3 | 0.4436 |
Compares the time-consuming on T4 GPU (ms):
| Model Name | Overall | Text Detector | Direction Classifier | Text Recognizer |
|---|---|---|---|---|
| ch_ppocr_mobile_v1.1 | 137 | 35 | 24 | 78 |
| ch_ppocr_server_v1.1 | 204 | 39 | 25 | 140 |
| ch_ppocr_mobile_v1.0 | 117 | 41 | - | 76 |
| ch_ppocr_server_v1.0 | 199 | 52 | - | 147 |
Compares the time-consuming on CPU (ms):
| Model Name | Overall | Text Detector | Direction Classifier | Text Recognizer |
|---|---|---|---|---|
| ch_ppocr_mobile_v1.1 | 421 | 164 | 51 | 206 |
| ch_ppocr_mobile_v1.0 | 398 | 219 | - | 179 |
Compares the model size, F-score, the time-consuming on SD 855 of between the slim models and the original models:
| Model Name | Model Size of the Whole System(M) |
Model Size of the Text Detector(M) |
Model Size of the Direction Classifier(M) |
Model Size of the Text Recognizer (M) |
F-score | SD 855 (ms) |
|---|---|---|---|---|---|---|
| ch_ppocr_mobile_v1.1 | 8.1 | 2.6 | 0.9 | 4.6 | 0.5193 | 306 |
| ch_ppocr_mobile_slim_v1.1 | 3.5 | 1.4 | 0.5 | 1.6 | 0.521 | 268 |
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