Mercurial > hgrepos > Python2 > PyMuPDF
comparison mupdf-source/thirdparty/tesseract/src/lstm/generate_lut.py @ 2:b50eed0cc0ef upstream
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
The directory name has changed: no version number in the expanded directory now.
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Mon, 15 Sep 2025 11:43:07 +0200 |
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| 1:1d09e1dec1d9 | 2:b50eed0cc0ef |
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| 1 #!/usr/bin/env python3 | |
| 2 | |
| 3 # Create C/C++ code for two lookup tables. | |
| 4 | |
| 5 import math | |
| 6 | |
| 7 # kTableSize and kScaleFactor must match the values in functions.h. | |
| 8 | |
| 9 # Size of static tables. | |
| 10 kTableSize = 4096 | |
| 11 # Scale factor for float arg to int index. | |
| 12 kScaleFactor = 256.0 | |
| 13 | |
| 14 print("// Generated code with lookup tables (see generate_lut.py)") | |
| 15 print('#include "functions.h"') | |
| 16 print("namespace tesseract {") | |
| 17 | |
| 18 print("const TFloat TanhTable[] = {") | |
| 19 for i in range(kTableSize): | |
| 20 print(" %a," % math.tanh(i / kScaleFactor)) | |
| 21 print("};") | |
| 22 | |
| 23 print("const TFloat LogisticTable[] = {") | |
| 24 for i in range(kTableSize): | |
| 25 print(" %a," % (1 / (1 + math.exp(-i / kScaleFactor)))) | |
| 26 print("};") | |
| 27 print("} // namespace tesseract.") |