Kodak Perfect Touch Processing

I found the following text in the Kodak EasyShare Software, which describes
their consumer photofinishing service as offered in the US:
_______________________________________

Kodak Perfect Touch Processing: Making Photographs Picture-Perfect
Advances in camera design can compensate for some of our photography flubs,
but not all of them. From auto-focus to fancy flashes, these features are
intended to prevent less-than-picture-perfect results. What most people do
not appreciate is that photo processing makes a big difference in how their
photos turn out.

From years of research in consumer picture taking and printing systems,
Eastman Kodak Company created a digital photo processing system called Kodak
Perfect Touch processing, which uses proprietary software to automatically
correct for common image flaws and "mistakes," such as dark shadows,
backlighting and soon -- red-eye. Kodak Perfect Touch processing also
enhances the desirable qualities of photos, for more vibrant color and
richer detail than regular processing.

Kodak Perfect Touch technology processes photos in three steps: First, film
is developed in the conventional fashion, and scanned to convert the images
to digital files. Next, those files are processed by software that reads and
analyzes image content, corrects and enhances it, and readies it for
printing. Finally, image data is sent to a high-speed digital printer for
output to paper, or it is packaged into files for Kodak Picture CDs, or
prepared for uploading to the Internet.

Sophisticated software algorithms - procedures based on mathematical
formulas - control the action of sensors that scan the image data. They also
analyze and correct image data, and direct the lasers that write the data
onto paper. In concert, these algorithms orchestrate Kodak Perfect Touch
processing software and hardware at every stage, to produce great pictures.
Here's how:

1. Scanning: Images are captured by Kodak sensors as red, blue and green
elements of data. Kodak algorithms precisely control the motion of the film
as it passes the sensor to give a distortion-free image.

2. Image Processing: High-speed algorithms that operate sequentially and
together analyze film order characteristics and scene content of each image,
to automatically determine the best image enhancement in terms of color
accuracy and density balance (overall lightness or darkness). They also
bring out detail in the shadow and highlight areas, and optimize sharpness
level. In fact, algorithms offer control over each pixel in an image, which
is typically scanned at 4.5 million pixels, as well as 4,000 gradations of
color and density.

3. Printing: Red, green and blue lasers that write the image to paper are
triggered in an orderly fashion, and printer software algorithms adjust the
lasers' action for the best results according to type of paper and its
reactive properties to light. Even this level of control is crucial to
consistently produce high-quality output, since different papers respond
uniquely to light.



Whether you over- or under-exposed a picture because your flash was too
close to your subject or you used the wrong film speed; whether snow glare
outshone the kids' smiles or the cabana shaded your best friend too well,
Kodak Perfect Touch technology digitizes and adjusts image content to
produce color, sharpness and detail in prints.

Soon, Kodak Perfect Touch processing will detect and reduce most instances
of red-eye, too. Advanced software algorithms automatically locate and
distinguish red-eye within an image, without any type of manual
intervention. A series of complex operations begins with detection of flesh
tones, followed by analysis of shapes of flesh tones to determine semblance
of a face. This means the software must be able to distinguish faces-like
image areas in many shapes, sizes, and positions, whether close together -
when the bride kisses the groom - or next to other areas of flesh tones, as
in a "dogpile" of football players on the field.

Next, Kodak Perfect Touch processing software calculates and maps the
probability that the presence of red dots might be eyes - and determines the
likelihood of an instance of red-eye. Then, the system corrects the
phenomenon, not simply by darkening the offending area, but by altering the
red areas in a natural and pleasing way. The area that is corrected is
carefully defined so that only the pupil, not the iris, is changed.

Years of Kodak research confirm that red-eye is one of the top problems that
consumers want corrected in their pictures. Most recently, nine out of ten
people surveyed said they would switch photo processing outlets to get
red-eye reduction. The great news for photographers, experienced or not:
Starting this fall, any photo order requesting Kodak Perfect Touch
processing service will include red-eye reduction—and deliver the color,
detail and sharpness that you want to remember.


--
Unfortunately nobody can control the disruptive behavior of sociopaths who
wish to post to an unmoderated newsgroup such as this one. Informed readers,
however, will have no trouble at all sorting the wheat from the chaff.