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
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
The standard
resolution
Resolution(s) may refer to:
Common meanings
* Resolution (debate), the statement which is debated in policy debate
* Resolution (law), a written motion adopted by a deliberative body
* New Year's resolution, a commitment that an individual mak ...
of the images is usually 512×512 or 720×576. Most of these images are available as
TIFF
Tag Image File Format, abbreviated TIFF or TIF, is an image file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. TIFF is widely supported by scanning, faxing, word process ...
files from the
University of Southern California
, mottoeng = "Let whoever earns the palm bear it"
, religious_affiliation = Nonsectarian—historically Methodist
, established =
, accreditation = WSCUC
, type = Private research university
, academic_affiliations =
, endowment = $8.1 ...
's Signal and Image Processing Institute.
Kodak
The Eastman Kodak Company (referred to simply as Kodak ) is an American public company that produces various products related to its historic basis in analogue photography. The company is headquartered in Rochester, New York, and is incorpor ...
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.
See also
*
Carole Hersee
*
FERET database The Facial Recognition Technology (FERET) database is a dataset used for facial recognition system evaluation as part of the Face Recognition Technology (FERET) program. It was first established in 1993 under a collaborative effort between Dr. Harr ...
(DARPA/NIST face recognition database)
*
Lenna
Lenna (or Lena) is a standard test image used in the field of image processing since 1973. It is a picture of the Swedish model Lena Forsén, shot by photographer Dwight Hooker, cropped from the centerfold of the November 1972 issue of ''Playbo ...
*
List of common 3D test models This is a list of models and meshes commonly used in 3D computer graphics for testing and demonstrating rendering algorithms and visual effects. Their use is important for comparing results, similar to the way standard test images are used in image ...
References
External links
The USC-SIPI Image Database— A large collection of standard test images
— A large collection of links to various test images
—
University of Reading
The University of Reading is a public university in Reading, Berkshire, England. It was founded in 1892 as University College, Reading, a University of Oxford extension college. The institution received the power to grant its own degrees in 192 ...
's set of popular test images
CIPR still images— Some sets of test images at
Rensselaer Polytechnic Institute (including the Kodak set)
True-color Kodak test images— The Kodak set in
PNG format
TESTIMAGES— Large collection of sample images designed for analysis and quality assessment of different kinds of displays (i.e. monitors, televisions and digital cinema projectors) and image processing techniques
{{Standard test item
Image processing
Test items