Digital Photos Up-Close

The appearance of a digital print depends on how we look at it. All prints are designed for a specific viewing distance and will contain artifacts when viewed at closer distances. For digital prints, this distance is typically 1.5 times the diagonal of the print or 17″ for an 8×8″ print and 25″ for a 12×12″ print. Similarly, books are designed to be viewed at a minimum distance of 10-12″.

20091016_Digital Photos Up-Close_1When prints or books are viewed closer than these distances the dot patterns that make up the digital prints become readily apparent. The dot patterns come from the way digital prints use different size dots to create the illusion of continuous tone. The image to the right is of an eye enlarged to show the dot structure.

 

20091016_Digital Photos Up-Close_2Traditional photographs do not generally show the same dot pattern. Instead, these prints show a noticable lack of sharpness when enlarged. The photo to the right is of an eye printed on traditional photographic paper.

The loss of sharpness with traditional photographic printing becomes particularly apparent with text and other high-contrast items that may be present in a digital image. The images below illustrate the difference in text reproduction with both methods.

20091016_Digital Photos Up-Close_3

20091016_Digital Photos Up-Close_4

Which print is better? The answer is that neither print is inherently better. They are different, and in fact, both systems are capable of producing high-quality digital prints.

About Mark Mizen

At Creative Memories, I evaluate photographic products and related materials so that today's memories are not lost to the future and then communicate this information to Creative Memories Consultants and their customers. My interests extend from preservation of traditional photographs to the production of photo books to the expected longevity of electronic image files. My long-term objective is to direct the development of technology that meets consumers needs for high-quality products.
This entry was posted in Digital Photos, Photo Books, TypePad. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s