Add default image processing settings manageable from a settings file
My experience with gImageReader is that it works much better if some settings (such as contrast and resolution) are selected at a higher value. Typically, for the kind of documents I scan (typewritten pages, books, etc.) the contrast has to be set to the value of ~50 and the resolution to 300 dpi. If the contrast is too low (default = 0), Tesseract tends to find characters where there are none. Since there is no option to save the default values, I need to do the same for each session anew. It would be great to have the possibility to save the default values of brightness, contrast, resolution and maybe the rotation angle in a config file, with a dialog to change the values from within the application. Not much work, as far as I understand.
The contrast/brightness spinboxes could be bound to settings using the ADD_SETTING macro, so that the values are persistently stored in the application settings. Question though is whether having them persistently stored is what people generally expect.