Determining Depth of Field (DOF) value from an image using histogram projection

Depth of Field (DOF) is generally used as the basic techniques of photography. DOF is depth which states space sharp range of distances and blurs the image object. Determining DOF value usually using metadata from the image. The metadata of an image described as details of the digital images taken from a camera. The interesting part of this research is about how to find the correct DOF value given that the detail of EXIF metadata from an image does not exist. This research was proposed to assist the calculating DOF value task when EXIF metadata from a digital image does not exist, using histogram projection. The best experimental results show the averages accuracy value for different f-stop is 85% and the average accuracy value for different focal length is 84%.