I have a year old Canon scanner. The problem is when I scan banknotes, I get a colored bars probably caused by the security system to prevent making accurate copies of bank notes Is there anyway to bypass this?
Get and older copier? Sorry, smart Alec answer. Interesting that they would have this kind of techno built in. Guess the US Govt. is tired of competition....
This might be software related, not scanner. Have you tried using different software? I`ve heard some scanners add microscopic marks that allow counterfeited banknotes tracking, never heard of a scanner adding colored bars. Most scanners with built-in protection just cancel the scan process when a banknote recognized. Doubted you can bypass this without harming scan quality. My 1.5 year old HP scans banknotes properly, tested on a 100.
Do you have the ability to "descreen", it typically offsets the effects of moiré on complicated patterns like this. If you have the ability to select this it should help significantly. Check in the tool bar or any settings dialog box. What is the model?
I think I figured it out. I increased the DPI to 600 from 150. Is there an optimum size to use for posting on the forum? At 600, I could blow up the note to see incredible detail. I reduced this note after by using my photo software. The scanner is a Canon MP480.
I scan most notes at 300 dpi, which usually covers most printers capabilities and is more than sufficient online. Stamps I scan at 600 dpi. I resize image files to 1600 pixels wide on the longest side. Here's an example of a Canadian note scanned 300 dpi, 1600 pixels wide, upload to Photobucket (who automatically and slightly scale images down):
I had an HP printer/scanner before this one and I couldn't scan notes. It would pop up a warning but if you continued it would change the colors especially in the yellow and blues. The outcome was a lot of green splotches all over.
I use an HP C4280 all-in-one (print/scan/copy). It's about 2-3 years old and came free with the purchase of my Mac. It is limited in some ways but I don't have too many problems besides the intensity of the lamp. However, when I try to open some bank note image files in Photoshop (CS3 and later) it detects the bank note and a warning dialog box pops up, but I can still mess around with tools and such. Here's what I get and the URL it lists for more info, rulesforuse.org:
When I had CS3, I got the same thing. I've gotten a couple of counterfeit notes at work that were obvious photocopies but because of the dim light (and sometimes dim staff) in our lounge they were good enough to pass. It wasn't until I examined them because of the odd texture of the paper that I found out they were phony. The micro printing was also blurred and the colors were off.
They're submitted to the Canadian Paper Money Museum. One of the members trains police etc. in counterfeit detection techniques. Over the last couple of years, I've donated half a dozen notes to them. When we get them, they're usually in one of the drivers' cash bags at the end of the night and there's no way to determine what address the note came from. Here are pics of a $20 that I received back in March. The colors are off slightly; the micro printing is blurred; the security strip isn't a hologram, it was just left as it was. But notice the addition of a bank stamp to give it the look of authenticity. It was added after photocopying.
Wow! That's incredible to see. Thanks for sharing these pics. Also, are these supposed to be the polymer type notes? or is this series one from paper runs?
i remember having a printer automatically putting the words real big "copy" or something across the scanned note? this was a few years ago and forgot about it. then a few weeks ago the history channel had some special on that was a few years old about US paper money. it talked about how in the future all scanners would have that kinda thing built into the software. i guess they were wrong! i need to try scanning a note on my scanner and see what it does.
