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Trying to access very long filenames (including path) is not allowed in Windows.
Default maximum filename (including path) is 260 chars.
How to use very long filenames in Delphi
function FixLongPath(Filename: string): string;
if Filename.StartsWith('\\')=false then // network share!
Filename:='\\?\'+Filename; // allows very long path
Tesseract 4’s accuracy is better than a Tesseract 3.
Tesseract 4 uses deep learning model: Long Short-Term Memory (LSTM) neural network which is a kind of Recurrent Neural Network (RNN).
Starting from Tesseract 4, the recognition is done with neural networks (LSTM engine), so the font name is not available. The latest version that you can get the font name, is version 3, which uses the old engine.
Tesseract 5 brings faster performance with “fast floats” (Tesseract authors switching from double calculations to floats — which is said to come with the added bonus of needing less system memory)
Latest official binary version for Windows is Tesseract 3.02. This includes the English training data.