Written by Stephen Shankland
Adobe promotes its Digital Negative (DNG) format as a replacement for the profusion of useful–but proprietary–image formats of today’s high-end cameras. The San Jose, Calif.-based company believes the industry and consumers would benefit from a unified format.
Now Adobe’s challenge is to build consumer demand and find industry allies. So far, only a handful of cameras support the technology, it doesn’t ease some of the difficulties of the proprietary formats, and it’s not a neutral industry standard.
But the company is patient. “When we announced DNG two years ago, we said that it would be a slow road to adoption. We already have a variety of cameras at different price points supporting the format natively. That’s very good progress,” said Tom Hogarty, Adobe’s digital imaging product manager.
DNG is the byproduct of the ability of higher-end cameras to store data in their own “raw” formats. While most cameras convert their sensor data into images in the JPEG format, raw formats record the unprocessed data. Photographers must use software to process raw into more convenient formats such as JPEG (Joint Photographic Experts Group) or TIFF (Tagged Image File Format).
All digital SLR cameras and several compact models can produce raw images, and enthusiasts and professional photographers have rapidly embraced the technology to gain fine lighting and tonal control for their photos.
“I shoot 95 percent nature images, and conditions and light are constantly changing. Shooting raw gives me so many opportunities to make adjustments before I start the actual editing process,” said Ray Barlow, a hobbyist nature photographer in Grimsby, Ontario.
But raw poses a problem for companies like Adobe, whose bread-and-butter business includes image-editing software such as Photoshop, Photoshop Elements and Photoshop Lightroom. They must write new software to support each new camera model’s raw image variation.
“This raw format Tower of Babel is going to explode,” said Dave Story, Adobe’s vice president of digital-imaging product development, who argues. Raw support is a challenge today, but Story argues it’s only going to get worse. That’s because more camera manufactures will add raw support, to entice consumers displeased that more megapixels from their camera hasn’t meant higher-quality images.
The second major motivation for DNG is to ensure raw images will have an archival standard that endures even if camera makers’ raw-processing software doesn’t work on future computers, or if those manufacturers themselves go out of business.
“There’s basically a new format for every single camera model. In 5, 10 or 15 years, how easy will it be to find software that supports those proprietary file formats?” Hogarty asked. “Is there a need for a unique format? Wouldn’t it be better if we stored information in a common way?”
That argument appeals to some photographers. “It is a great idea to have a standard for raw images, because who knows where photography will go in the future?” said Holly Yurchison, a Cincinnati, Ohio, photographer who recently began selling family portraits.
Ken Milburn, author of Digital Photography Expert Techniques, likes DNG’s longevity. “It makes sense to convert whatever you get out of your camera into DNG just for archival purposes,” Milburn said. (Adobe offers a free tool to convert images into DNG.)