Scanning Tips And Tricks For Best Details Images?

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Author	Replies: 4 / Views: 4,304
Dottir Pillar of the Community Canada 864 Posts	Posted 11/06/2010 6:49 pm Hi. New to coins, also new to using a scanner. Would love to hear some good tips and tricks for getting good details images for uploading to show them. My own scanner is an HP Deskjet F2100 All-In-One (scanner, copier, printer) Scan options show I can adjust resolution ranges anywhere betwee 75 to 1200. I opt for 1200, otherwise the image is too small and unclear. I then have to choose the "fill screen with image" option to get a big image to post. This makes for seeing pixelly like lines from adjusting size or resolution, I'm not sure which causes the lines. Point is, they do distort the images a bit. Any tips? I can adjust brightness and contrast, each has a slide scale, that I scan a coin repeatedly using various settings. I haven't mastered these setting yet and the coins darkness or brightness/lightness effects settings differently. Not sure what settings are best or which way to slide the contrast and brightness scales, or whether up or down from each other. Any tips? The only other options are for whether picture type is color, gray scale, or B&W or text. I always use color. (in my editing after scans are done I can also invert colours to bluey-grey to see any high points and edges that might not be clear on the color image. Zooming in to scan a portion of an image is difficult to resize the little box to just choose that small area of an already very tiny picture so I can't see before scanning what part of the image will scan. Anyone have any tips for positioning and angling coins in a scanner to be able to catch some detail that flat face down scanning can't quite catch? (like doubling effects showing on letters, numbers, devices?) Can't think of anything else to mention at the moment but I hope this thread can help some other people learn how to scan too. Thanks to anyone for any tips and tricks here Report this Post to the Staff

mdpmedia Pillar of the Community United States 3546 Posts	Posted 11/06/2010 8:39 pm Dot I just happened to address this issue in a recent thread. Please go to: https://goccf.com/t/74424 and you will find my verbiage about half way down on the page. If I can help you further, just ask and I'll do my best to respond when I can get to it. FYI Mark Report this Post to the Staff
Dottir Pillar of the Community Canada 864 Posts	Posted 11/06/2010 9:16 pm Thanks a lot Mark :) am off to visit that thread immediately! Report this Post to the Staff
John Galt New Member United States 37 Posts	Posted 12/24/2010 3:28 pm Dottir wrote: Quote: My own scanner is an HP Deskjet F2100 All-In-One (scanner, copier, printer) That's a pretty good scanner. I use two different HP Scanners myself. One is a Photosmart PSC-2175, and the other is an OfficeJet 7110. Both are al-in-ones. Here's what I've found. Make sure your scanner glass is clean (both sides) and unscratched. If you have a scratch on the glass, just avoid putting your coins in that area. Cleaning the inside of the glass can be difficult, but it can be done. Unfortunately, HP doesn't publish much in the way of repair manuals. Google can help with this. I generally use 600dpi (sometimes ony 300dpi) resolution. At 1200dpi you'l see details (flaws) which nobody can see, even with a 10x or 20x jeweler's loupe. A 1200dpi scan will show details that only are visible with a microscope. I usually don't mess with contrast or brightness at the scanning step. I use a photo editor (I use the GIMP, but photoshop or a similar program will work as well). Usually I find a +10% to +20% adjustment on contrast helps reveal detail without "doctoring" the image. For both my HP Scanners, the scanner "eye" (trying not to be too technical here) travels down the centerline of the bed. This means that a coin placed directly over the centerline will appear flat, without much depth. Placing coins on the edge of the scanner bed will show more depth. Note the edges of each coin in this picture and you'll see what I mean about the point of view. The centerline of the scanner bed was in the left half of the 4th coin (from the left) in that pic. Note that you can see the edge fluting on the right side of the first coin. The scanner's point of view was such that the inner edge of that coin shows, but the outer edge is hidden. In generaly, the coin near the left edge of the scanner bed will show more depth detail than the ones near the center of the scanner bed. Scanning the same side of the coin twice once with it turned 180 degrees from the other scan, will often show more details. Again, this is a point of view thing for the scanner. The detail is more pronounced if you have the coin on the left edge of the scanner bed. Edited by John Galt 12/24/2010 3:34 pm Report this Post to the Staff
Dottir Pillar of the Community Canada 864 Posts	Posted 12/24/2010 7:52 pm Thank you so much for those tips and tricks John! I've been scanning at 1200 will try your tricks next time I scan ;) Report this Post to the Staff
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