Grey Scale Images
Although the complete book in binarised form, i.e. in black and white, is available from this web site, the original scanned images, which are in 8 bit grey scale, come to a total of 19 GBytes as 600 pixels per inch TIFF files using zip (deflate) compression. Because of the size of this collection, the losslessly compressed version of these images are not available online. However, they are available on request by alternative means. Please contact A.P.Sexton@cs.bham.ac.uk to make arrangements.
In the absence of web accessible versions of the full losslessly compressed grey scale images, the following files contain a LOSSY compressed version of the original grey scale images. These are tar gzip archives of the pages of the book where each page is stored as a TIFF 8bit grey scale image with JPEG compression with the compression level set to 60%.
| 8 bit grey scale, 600dpi page images stored with lossy JPEG:60 compression | ||
|---|---|---|
| Description | Size | Download |
| Original, 8 bit grey scale, 600dpi scanned images of the book pages | 2.4 GBytes | AandS-grey600-jpg60.tgz |
| Deskewed version of the above grey scale images | 2.4 GBytes | AandS-grey600-deskewed-jpg60.tgz |
I have made a selection of the original LOSSLESS grey page scans available. If you have a need for the full collection of lossless compressed grey page scans, please contact me explaining your requirement and I will try to overcome the logistical problems of providing them to you.
The following are samples from the original lossless compressed scans without any image processing applied (click on the thumbnails for the full resolution images). They are all 600 pixels per inch, 8 bit grey scale, deflate compressed, single page TIFF images. Each image is between 17.5 and 20.5 MBytes. They are provided both for the curious and for anyone interested in using them for research on binarisation, noise reduction, de-skewing, or grey scale optical character recognition.
