图片 is a broader term. It can refer to a photo you took, a meme on the internet or design you made using Photoshop. 照片 can only refer to a photograph.

照片: photo 图片: image

图片：A general designation for pictures, photographs, rubbings, etc. used to illustrate something 照片：A picture of a person or thing printed on sensitive paper （photograph）

图片：A picture that can be downloaded in the web page.and the photograph that oneself take turns out to also can call a picture. 照片：Taken with a camera or a cell phone. Key:Pictures contain photos. Photographs have less meaning than pictures.

图片 image, a figure, a drawing etc. Can be a photo. 照片 photograph