02-29-2012, 12:14 AM | #16 |
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I'm looking at buying a P-150 (on sale at Newegg for $215), and the PC Mag review notes:
"One last feature worth mention is a color dropout option in the driver. If you scan pages printed on color paper in black-and-white mode, the pages often come out solid black. The color dropout option can make the text appear—as I proved in my tests with a document printed on orange paper. Even documents printed on white paper often have similar issues with highlighted text, a situation where this feature can come in handy as well." Might that help with the yellowed pages? |
02-29-2012, 01:51 AM | #17 |
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Yes - I think it will help when you have an even background of one color e.g. dark blue with black characters on it. I found it not so efficient for my special problem with uneven yellowness across the pages plus staines.
As long as either the scanner or the software discriminates well enough in b&w the results are good. My current workflow includes ScanTailor and this proves to be worth the additional effort. I always scan gray now with setting the "brightness" of the scanner to approx. 75% of the scale of the Canon P-150 (whatever the scale means ). This makes the overall appearance of the page a bit pale but helps with the b&w discrimination of ScanTailor at a later point in time. There is one ScanTailor feature i.e. Despeckling that I find more and more useful especially for older books. As to the P-150: meanwhile I scanned 50 books with an average of 200-400 pages per book without problems. I always use a pack of 40 [edit] sheets to feed into the paper feeder and this still works flawlessly. The failure rate is approx. 5%. Klaus Last edited by kbaerwald; 02-29-2012 at 03:13 AM. |
02-29-2012, 07:02 PM | #18 |
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Impressive, and thanks for the review! I ordered one yesterday and plan to use it much the same way as yours.
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03-01-2012, 04:41 AM | #19 | |
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Maybe I misunderstand you, but if it means that some pages were omitted(not processed) - that is what drove me crazy when using this kind of scanner. Reintegrating the forgotten pages took too much time. As far as workflow is concerned: do you know "pdfscissors"? |
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03-01-2012, 05:56 AM | #20 | |
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This may be due to - sheets sticking together (rests of spine glue: I did not cut deep enough) - major parts of the page are not readable (rescan with other brightness settings) - scanner pulls sheets in slanted In the meantime I control the sheets before I process them with the scanner. So I can detect sticked sheets easily. Sometimes the friction between the sheets is pretty high because of a rough surface. It always helps when I shake and reorder the pages before scanning so to make the sheets more "movable". It is also important to arrange the pack of sheets in a "jagged" way to make the feeding easier. I think the scanning mechanism is not to blame for the majority of problems. Last edited by kbaerwald; 03-01-2012 at 06:44 AM. |
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03-02-2012, 02:23 AM | #21 |
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03-02-2012, 07:11 AM | #22 | |
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So in the end there does not seem to be a lot of difference between the two procedures. |
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