Imaging - analog and digital

   High Dynamic Range imaging (HDR) has come some way since I first ran across the initial phenomenon in the late 90's. HDR is a file format for images that contains numbers. The numbers represent so much pictorial information, no monitor or printer can display the data in it's entirety. The HDR image is like a digital negative in as much as making a print involves adjusting the enlarger aperture and light source to an exposure level consistent with the photographer's goals. No one exposure represents the negative entirely. Lighter exposures reveal different details than a lower exposure.    An HDR image is formed by taking a series of images that vary only in shutter speed, and combining them in a defined way. Think of an unsliced loaf of bread as an image. T he several images represent every nth slice in a sliced loaf. The other slices are filled in using highly educated guesses to get a full, sliced loaf. Each slice represents a specific shutter speed.   ...

   I for got to mention in my introduction to this blog, that film scanning would also be discussed. I inherited a large number of photo negatives from my father. These negatives range in dates from the late 1930's to the 1970's.    Fortunately, most of the film is in 620 format. This large format preserves more detail than smaller formats such as 35mm. The film subjects are of several types. Family photos before and after my father married my mother and photos from his time in the military, Army Air Corp.    I decided many, years ago, to attempt to digitize the images and store them on my computer. There was little technology and knowledge available on the topic then. Much more has developed, but what I discovered, remains to this day, as far as I know, the most advance process available. Unfortunately, I won't be able to share the details since my copyrights and patent rights are not protected. I will reveal much useful information though.

This blog is dedicated to imaging. The initial primary focus will be high dynamic range imaging. The application of mathematics to imaging will be included. Color management in general, and specifically, on a Windows PC is also part of the discussion.