In JPG or PNG formats, the text is stored as an image. In a PDF or Office file, the text is stored as text. To read an image, DLP would need to incorporate optical character recognition functionality, which is significantly more resource intensive than the normal DLP product is, and not entirely accurate.
Hi! where can i get the character recognition functionality?
You can't get it.
OCR is not a part of DLP (and any other DLP product). You need to submit it as a product improvement suggestion.
You can try other vendor ?
OCR in DLP is available using Triton I believe.