The list of uncompressed PPM images with sizes is here.

If you wish to download the LPCB test images, here is what you should do.

Click SEARCH METHODS on the bottom of page
Find Search by Feature Name, enter a and press Enter.
Download all images with
(1) date between 2011-01-01 and 2011-03-31,
(2) width less than 10500 and height less than 10500,
(3) three channels, e.g. 3456x2304x3, skip all images with resolution ending with x1.
Conversion from TIF to PPM by NConvert 5.91:
nconvert.exe -out ppm *.tif
Exclude ex-JPEGs using this Detector for ex-JPEGs.
Most probably you have downloaded 110 images, and 65 of them have been detected as ex-JPEGs.
The remaining 45 images were split into two sets:
20 images (829 Mb) with stars, galaxies, and nebulae,
25 images (380 Mb) with everything else: Earth's surface, space bodies, artists' concepts, etc.

Search for "sample raw images" on, only pages with dates between 2011-1-1 and 2011-4-4.
With the advanced Google search you will most probably see links to the following seven pages:
18 Jan 2011
26 Jan 2011
 7 Feb 2011
17 Feb 2011
17 Mar 2011
22 Mar 2011
24 Mar 2011

Only images from the four most recent Olympus, Sony, Fujifilm and Canon camera reviews were utilized.
On the Sony A55 page images 12, 13, 14 were excluded as they are very similar to image 11, and
for the same reason images 7, 8, 9, 10 from the Canon set, images 7, 8, 9 from the Fujifilm set.
Conversion to PPM format was done by NConvert 5.91:
nconvert.exe -out ppm -high_res -raw_camerabalance *.orf *.arw *.raf *.cr2
None of the 62 images were detected as ex-JPEGs (same version of Detector, link above).
Olympus' images are 10 megapixels each (30 Mb), Fujifilm's and Canon's 12 Mp, Sony's 16 Mp.
Three cameras got Image Quality 4.5 on the Review Conclusion pages, only Fujifilm FinePix X100 has Image Quality 5.0.

Since 10-Nov-2011 you can download test images from CompressionRatings.Com in GraLIC 1.11 format or in a ZIP archive.

Return to the main LPCB page.