Sunday, July 10, 2011


The images historically used for compression research (lena, barbra, pepper etc...) have outlived their useful life and its about time they become a part of history only. They are too small, come from data sources too old and are available in only 8-bit precision.

These high-resolution high-precision images have been carefully selected to aid in image compression research and algorithm evaluation. These are photographic images chosen to come from a wide variety of sources and each one picked to stress different aspects of algorithms. Images are available in 8-bit, 16-bit and 16-bit linear variations, RGB and gray.


RGB 8 bit (330 MB), RGB 16 bit (787 MB), RGB 16 bit linear (626 MB)
Gray 8 bit (103 MB), Gray 16 bit (285 MB), Gray 16 bit linear (207 MB)

You are encouraged to use these images for image compression research and algorithm evaluation. Suggestions for further improvements are always welcome.

Preview: click on the images to enlarge, you can enlarge multiple images at same time. You can also checkout results of various lossless and lossy compression algorithms on these images.

Computer generated using 3D modeling and ray-tracing.

Hasselblad H3D II-39

Leaf Aptus 65

Fuji Provia 100, film
(Not available in linear sets)

Olympus E-330


Leaf Cantare


These Images are available without any prohibitive copyright restrictions.

These images are (c) there respective owners. You are granted full redistribution and publication rights on these images provided:
1. The origin of the pictures must not be misrepresented; you must not claim that you took the original pictures. If you use, publish or redistribute them, an acknowledgment would be appreciated but is not required.
2. Altered versions must be plainly marked as such, and must not be misinterpreted as being the originals.
3. No payment is required for distribution of this material, it must be available freely under the conditions stated here. That is, it is prohibited to sell the material.
4. This notice may not be removed or altered from any distribution.


A lot of people contributed a lot of time and effort in making this test set possible. Thanks to everyone who shared their opinion in any of the discussions online or by email. Thanks to Axel Becker, Thomas Richter and Niels Fröhling for their extensive help in picking images, running all the various tests etc... Thanks to Pete Fraser, Tony Story, Wayne J. Cosshall, David Coffin, Bruce Lindbloom, and for the images which make up this set.

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