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Harvard
University Library Page Images Evaluation Project
home 006393844_0001, text Rand McNally & Co.'s pocket atlas of the world, containing colored maps of each state and territory in the United States… Illustrated by more than one hundred colored diagrams… New York : The Company, 1887 [HOLLIS 006393844] |
Image Quality Evaluations: 2006 study (librarian evaluators) - uncorrected camera TIFF (source for the processed RGB TIFF) (5,749 KB) - processed RGB TIFF (source image for JP2 processing) (5,475 KB) - 600 ppi 1-bit TIFF (from processed RGB TIFF) (129 KB) -- image production notes Google Book Search version (not evaluated: linked here for comparison to JP2) |
Quality
level |
Setting |
File
size (KB) |
Page
image |
evaluated in 2006 |
0 |
lossless |
3,478 3,444 3,420 |
no no no |
|
1 |
PSNR, 40 dB MSE, slope value 50980 Q = 70 |
1,191 921 744 |
yes no no |
|
2 |
PSNR, 38.3 dB MSE, slope value 51492 Q = 50 |
993 460 474 |
no no no |
|
3 |
PSNR, 36.7 dB MSE, slope value 51748 Q = 40 |
808 326 376 |
no no no |
|
4 |
PSNR, 35 dB MSE, slope value 51876 Q = 35 |
590 294 332 |
yes no no |
|
5 |
PSNR, 32.5 dB MSE, slope value 52004 Q = 30 |
407 258 290 |
no no no |
|
6 |
PSNR, 30 dB MSE, slope value 52196 Q = 20 |
274 180 207 |
yes no no |