To add an image to an IMDb page, you'll need an IMDbPro membership for the page you wish to claim. You can claim one IMDb page per IMDbPro membership. If you want to upload images to multiple pages, you will need to create a membership for each IMDb page.
If you haven't claimed your page, please go to claim your page. Once you've claimed your page, you'll be able to add images, upload a demo reel, select you Known For Titles, add a Resume, and select your Featured Images.
If you're a Talent Representative and want to add images to your client's IMDb pages, please see more info on Client Scorecard.