ROCHESTER, N.Y. — In the brave new digital-photography age, cherished pictures of pets, landscapes and loved ones are showing up in unusual places — on swimming pool tiles, furniture and even tombstones.

As digital cameras find their way into more than half of America's homes, one old habit has taken hold again: Most people now send their digital pictures out to be developed rather than print them at home. And they don't just order 4-by-6-inch snapshots at the corner pharmacy.

In the lucrative print business, the number of digital and film images converted into conventional prints has been slipping since 2000 and could dip another 5 percent to 25 billion this year, according to Photo Marketing Association International, a trade group whose annual convention opens Saturday in Orlando, Fla.

Overall revenues are rising, however, as alternatives blossom, from putting computer reproductions of images onto posters, postage stamps and postcards to T-shirts, chairs, wallpaper and bronze plaques.

"Images are no longer good enough in a frame on the wall," said Mitch Robison, 46, whose Sierra Custom Design studio in Bishop, Calif., transfers photos onto ceramic tile to add sparkle to Jacuzzi rooms, restaurant murals, tabletops and fireplace mantels.

"It's functional art versus just decorative art. People like to touch it. It's a little more personal."

While film processing generated just $3.9 billion last year, compared with $6.2 billion in 2000, digital printing — including consumables used at home — churned out an estimated $3 billion more in sales, said Dimitrios Delis, research director at the Jackson, Mich.-based Photo Marketing Association.

In addition, putting images on wood, stone, plastic and metal as well as paper of all kinds — birthday cards, calendars and storytelling photo books that "people actually use instead of just keeping around for storage or display" — brought in an extra $1.5 billion, Delis guessed.

The more ubiquitous digital technology becomes, the more likely that old printing routines will be resurrected — and surprising new ones will emerge, Delis said.

In the United States, prints ordered from retailers and Web sites or made at home fell from a peak of 30.3 billion in 2000 to about 26.3 billion in 2005. But that downward path should bottom out in 2007 and begin ascending again in 2008 as the bulk of shutterbugs shift over from film cameras, Delis predicted.

Of the 7.9 billion digital prints made in 2005, 49 percent were created at home, down from a 61 percent share in 2004 and 90 percent in 2000, Delis said.

Online photo services, which have been whittled down to a handful of big players, printed about 1 billion images, or 13 percent of the market. And digital orders at retailers, who look likely to re-emerge soon as the kings of printing, jumped to 3 billion prints from 1.9 billion in 2004.

Kodak, which has nearly 75,000 photo kiosks installed at retail businesses worldwide, is bringing in a more versatile film-and-digital kiosk system this spring that can handle up to 900 prints an hour.

"Retail is actually the fastest growing segment of digital printing right now," said Nicki Zongrone, Kodak's general manager for kiosk systems and services. "Early adopters were more techno-savvy, spent a lot of times fiddling with images, printing some but not all of them. As that mainstream consumer has moved to a digital camera, they want to be able to get their high-quality prints as easily as they've been used to."

Propelled by price battles among retailers led by Wal-Mart Stores Inc. and Costco Inc., and online photo-storage sites like www.Snapfish.com and www.Shutterfly.com, prints from digital cameras could swell to 10.9 billion this year and outnumber prints from film cameras by 2007.

The average price for a digital print has dipped to 17 cents online and 21 cents in retail outlets, Delis said, and some online services offer a stash of free prints for registering as an incentive.

While often a good deal more expensive, images reproduced by customized-photo specialists are generating a buzz.