What is the best software for cropping/cutting out people from a digital image and being able to drastically increase the size of the cropped image? For instance, I would like to crop out a person from a digital image that is 3600 pixels wide by 2500 pixels high and print that person at about 3'-4' tall for a poster board. Is it Photoshop or something else? Please provide the exact version that you recommend . By the way, the camera used is a Canon IS, not a DSLR. Will the resolution be difficult to manipulte at these large print sizes? Thanks in advance.