These depth maps, along with other imagery, are stored in High Efficiency Image File Format (HEIF) container files. Since then, HEIC files are the default storage container format for images captured on the iPhone. In this post, I'll walk through Finn's codebase with an example image from an iPhone 15 Pro. The following is a screenshot of the Depth Map. Note the original image was 5712 x 4284-pixels but the depth map is only 768 x 576-pixels.