Scanning to B & W vs. Gray Scale?
When scanning @ 600 DPI to PDF files:
Are there any disadvantages in scanning to gray scale, outside of the larger file size? I am talking about scanning @ 600 DPI to PDF only. Not other resolutions or other file types.
There seems to be several advantages to scanning to Gray Scale AFAICT:
1) One of my OCR programs tells me it's more accurate with gray scale.
2) I've noticed when scanning hand written text in pencil, it works much better with gray scale.
I wonder though...if I have hard copy I wanna scan, but the text is a bit faded, would I get a clearer scan by choosing black and white instead of gray scale?
The reason I ask is...if the source text is a bit faded, then instead of interpolating the text in shades of shades of gray, it would interpolate all text as pure black, so it would come out with more contrast than the original faded text...or am I wrong here?
Last edited by Chumly; 12-03-2010 at 10:24 AM.
Another few questions kind BCSB'ers!
When scanning at home, I go from my Canon MF4150 to Adobe Acrobat Pro 9 and it despeckles and deskews. However Adobe Acrobat Pro 9 cannot deskew at more the 17 degrees (I think it is) so I've read you need Photoshop (or equivalent) and have to adjust each page manually (what a pain in the butt if true).
What I would much prefer is a despeckling and deskewing all-in-one application that can handle larger angles than 17 degrees.
As far as OCR I am open to suggestions as to which you think is best.
In fact I am open to any suggestions you have to get the best possible scans from text that is faded, and/or old, and/or photocopied too many times, and/or speckled, etc.
Here is another question I hope you can help with. When scanning at work I've been trying to find a simple easy method to handle larger scanned pdf files, but I have not been able to.
When using the Canon ImageRUNNER 7086 to scan documents to pdf, they get forwarded as attachments via email. The problem is the pdf file gets chopped into small scraps of about 800 KB to 2 MB each. That translates to only about six double-sided pages at 600 DPI per attachment. This means larger pdf scans use many separate emails. This turns out to be very impractical and time consuming because I have so many divided files to deal with.
Is there some way to stop the Canon ImageRUNNER 7086 from dividing a scanned pdf into many separate emails? Or is there some way I can scan to pdf and then access the file via FTP? Or is there some way I can scan to pdf and have the file available on the network Shared Drive? Or is there some way to access the file via USB or Ethernet directly from the Canon ImageRUNNER 7086 to my laptop?
The bottom line is, I wish to simply and easily and quickly scan lager documents @ 600 DPI to pdf as a single file, and then offload the file to my laptop.
Also the Canon ImageRUNNER 7086 seems to only scan to pdf in Black and White and not Gray Scale, but why might that be? It will scan to tiff @ 600 DPI, but I do not if that would be a good thing or not. What say you?
Also as a general question for both home and work, if I have a document scanned in as a pdf @ 600 DPI can I despeckle and deskew later or does that process have to be done while the data is actually being transmitted by the scanner in real time?