Participants can upload photos/images in the below listed tools:
Places - Use places to allow your community to upload photos or images related to specific location. Read about 'Add Photo' in article Participant view of places
Stories - Use stories to allow you community to share rich media like images and videos by simply embedding them directly into their story submission. Read about the participant view in article Add a Story
Surveys - Use the survey file upload question type to receive submissions in any format. Read about 'File Upload' questions in our article Survey Question Types Explained
For more information about tools and when to use them, read our help article What tools for what purpose. And, learn more about restrictions on file sizes and type in our article What are the file sizes and types supported on EHQ.
*Survey supports all common file types for upload not just images.