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Artville: Four Seasons - A Panoramic View
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Artville - Four Seasons - A Panoramic View.iso
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techspec.txt
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1998-10-26
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IMPORTANT
When using a high-resolution image, you MUST first open the image in an
image-editing or file conversion application and re-save the file in a
format other than JPEG. THIS IS A CRITICAL STEP TO MAINTAIN THE QUALITY
OF THE IMAGE. Check with your service bureau to determine the best file
format for your project.
TECHNICAL SPECIFICATIONS: BITMAP FILES
The files on this disk have been saved in a variety of convenient formats,
canvas sizes and resolutions.
LARGE AND MEDIUM CANVAS SIZES
Each file is saved with two canvas sizes: Large and Medium. In general,
large-canvas size files are between 28 and 35 MB in file size to
accommodate a letter-sized bleed image at 300 dpi. The medium-canvas
size files are exactly one-half as wide and tall as their large-canvas size
counterparts, making the file sizes about one-fourth as large.
HIGH-RESOLUTION AND LOW-RESOLUTION FILES
Each large-canvas and medium-canvas image is saved at 300 dpi for high-
resolution reproduction and at 72 dpi for position-only placement. The
low-resolution files possess exactly the same canvas dimensions as their
high-resolution counterparts to provide precise and efficient image
replacement when the file is ultimately prepared for high-resolution
output.
TIFF AND JPEG FORMATS
The high-resolution versions of both canvas sizes are saved as JPEG files;
the low-resolution versions are saved as TIFFs. Both formats are saved in
RGB color space. Again, check with your service bureau and/or printer to
determine when and how the conversion to CMYK color space should be
made.
FILE NAMES
Images of either resolution/canvas size can be identified by the first six
characters of the file name. The file name suffix identifies the specific
resolution and canvas size of the file:
LH.JPG = Large Canvas, High Resolution
LL.TIF = Large Canvas, Low Resolution
MH.JPG = Medium Canvas, High Resolution
ML.TIF = Medium Canvas, Low Resolution
FILE COMPRESSION
Because the high-resolution images are saved as JPEG images, it is
important to note a few important features of JPEG compression. While no
image degradation is noticeable after a single compression-decompression
cycle, subsequent compressions will begin to soften and otherwise degrade
the image integrity. To preserve optimum image quality, it is important to
never re-save the images in JPEG format. Depending on the target
application and operating system, it is best to save the high-resolution
images as TIFF, EPS or another format as either uncompressed files or
files employing "lossless" compression such as LZW compression.