Mosaic crochet patterns by programming

I want to be able to upload a photo in jpeg that will create a mosaic pattern that includes "X" 's in the pattern that demonstrates where the double crochet stitch is needed. The photo that is uploaded needs to be in certain dimensions, such as 50 x 50 stitches or 75 x 75 stitches. If the photo is large, it can be reduced to these dimensions. The final outcome is shown in the attached files. I will include a whole PDF file from one that I purchased, I want to be able to generate this thru a software program. Please see pages 1 and page 11. Do not worry about the symbol keys. The photo should look like page 11 after it's been converted to a pixel format. Page 1 would be the outcome of a photo and the crochet was completed after following page 11. The final outcome would be on page 1. I need the program to place the X's that are on page 11. Is this possible?