I'm using tesseract on forms and I need to call setRectangle to retrieve specific fields. Unfortunately the forms are sometimes translated, and sometimes a bit rotated or other transformations. Is there a good primer I can read on how to calculate the translation, rotation, etc? I'm assuming it would involve taking a recognizable object that occurs on all of the forms, such as a line, and calculating the position of this, then calling setRectangle with coordinates calculated from the position of this "landmark" object. (the line)
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