In order to perform an analysis of portrait images, I need at least 5,000 images. They need to be at least 150x150 in size, jpg or png.
There will be no copyright infringement as the images will only be used for analysis.
In order to see the image types that are needed, start by going to google images. Type headshot. The search results are mostly what are needed. I need grayscale images rejected (or deleted). I need cartoon images rejected (or deleted).