1_README.TXT

Kodak PhotoCD (PCD) Files:  How to Use the Five Sizes

For users who have commercial software that can read and 
print PCD files, the photographs are provided on this CD-ROM 
in that format in the this folder.  

Each PCD file has five resolutions of images contained within 
each file.  You can make a choice as to which one you want to 
use rather than needing to down-sample an image that is 
larger than you need.  For example, when you open a PCD file 
in Adobe Photoshop, you get a dialog box where you select the 
resolution of your choice and then that version of the image 
opens.  

You can also use the largest of the choices, for instance, to 
make a poster-sized hard copy on a large plotter.  Do this by 
opening a PCD in high-resolution mode (3072 x 2048 pixels) 
and setting the image size to 90 dpi and you will get a 
picture that is nearly two-feet by three-feet.

In the hierarchy of file formats, PhotoCD (YCC) resides above 
BMP, EPS, GIF, JPEG, MOV, PCX, PICT, PSD, TIF, TIFF, etc., 
enabling end users to go from YCC to other formats, but not 
in the other direction without losing image quality.  Each 
24-bit color image is stored as 5 resolutions:

1.  Thumbnail [192 x 128 pixels]--Contact-sheet-size images 
for quick previewing of the entire collection.

2. FPO "For Placement Only" [384 x 256 pixels]--A proxy for 
high-resolution images to determine placement in page-
layout programs.

3. Screen Resolution [786 x 512 pixels]--Ideal for computer 
viewing and multimedia projects.

4. HDTV High-Definition Television [1536 x 1024 pixels]--
Sufficient resolution for high definition TV, newspapers, 
and high-quality half-page layouts.

5. High Resolution [3072 x 2048 pixels]--Provides the 
printing industry with  resolution sufficient for high-
quality full-page layouts at 300 dpi/150 lpi and 24-bit 
color.