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Digital image used to test image algorithms
A
standard test image
is a digital image file used across different institutions to test
image processing
and
image compression
algorithms. By using the same standard test images, different labs are able to compare results, both visually and quantitatively.
The images are in many cases chosen to represent natural or typical images that a class of processing techniques would need to deal with. Other test images are chosen because they present a range of challenges to image reconstruction algorithms, such as the reproduction of fine detail and textures, sharp transitions and edges, and uniform regions.
Historical origins
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Test images as transmission system calibration material probably date back to the original Paris to Lyon fax link. Analogue Fax equipment (and photographic equipment for the printing trade) were the largest user groups of the standardized image for calibration technology until the coming of television and digital image transmission systems.
Common test image resolutions
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The standard
resolution
of the images is usually 512×512 or 720×576. Most of these images are available as
TIFF
files from the
University of Southern California
's Signal and Image Processing Institute.
[1]
Kodak
has released 768×512 images, available as
PNGs
, that was originally on
Photo CD
with higher resolution, that are widely used for comparing image compression techniques.
[2]
See also
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References
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External links
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Standard test items
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Artificial intelligence
| |
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Television (
test card
)
|
- SMPTE color bars
- EBU colour bars
- Indian-head test pattern
- EIA 1956 resolution chart
- BBC Test Card
A
,
B
,
C
,
D
,
E
,
F
,
G
,
H
,
J
,
W
,
X
- ETP-1
- Philips circle pattern
(
PM 5538
,
PM 5540
,
PM 5544
,
PM 5644
)
- Snell & Wilcox SW2/SW4
- Telefunken FuBK
- TVE test card
- UEIT
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Computer languages
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Data compression
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3D computer graphics
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Machine learning
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Typography
(
filler text
)
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Other
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