I am afraid, Corsiva is not one of the supported font families by Aspose.OCR APIs therefore when you perform the OCR operation on the attached image you will get the garbage data. We have logged a feature request in our database to provide the said support in future releases of Aspose.OCR APIs. The ticket Id for your future reference is OCR-33880.
Please note, the current implementation of Aspose.OCR APIs support the following font families.
Arial
Times New Roman
Courier New
Tahoma
Calibri
Verdana
Please feel free to write back in case you have further concerns or questions.