PHP - Blocking of uploaded adult images

Question

We have a setup a product management system where the head of the product development can upload pictures of products and those pictures will instantly show up on our websit

Answer 1

It's a difficult problem in any language, the image processing problem is extremely hard.

There is some research on the subject:

• Appearance-Based Nude Image Detection
• SNIF: a simple nude image finder
• Filtering Objectionable Image Based on Image Content