PNG files typically contain very little information. In contrast, a JPEG from a camera usually contains a wide variety of information, including the camera's make and model, focal and aperture information, and timestamps.
Some formats, like BMP, PPM, and PBM contain very little information beyond the image dimensions and color space.
Metadata provides information about a picture's pedigree, including the type of camera used, color space information, and application notes.ĭifferent picture formats include different types of metadata. They also contain information (metadata) about the picture. Most image files do not just contain a picture.