caption: In this system, a number is represented as:
exif: {"Image DocumentName": "In this system, a number is represented as:", "Image ImageDescription": "and has the value of:", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}