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Scanhancer any good? Canon FS4000US
Anyone used scanhancer and is it any good? I have a Canon FS4000US but when
enlarging my scans of negs and slides they always look grainy (at 4000dpi). I also wondered about the merits of using Vuescan or Silverfast instead of Filmget. Any advice or tips appreciated. I want to get the most detail from my film with minimum grain effect. |
#2
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You are probably aware of all this: if an image is grainy then scanning at
4000dpi will yield an excellent scan of the grain pattern. Unless you have a specific need for a scan that large you may want to consider limiting scan size to 2400 dpi. There are a number of photshop plug-ins that will reduce the apparent graininess of an image, and their are techniques to do it manually. One reason for being wary about large scan sizes, and even using 48 bit color, is that eventually most of the data will have to be stripped out anyway for image manipulation and this will be done in an arbitrary fashion by a program, like your printer driver, over which you really have no control anyway. Even 48 bit color has its caveats: the color gamut can be so much wider than the printer's that you introduce an unintended artifact when the image is converted for 8 bit/300 dpi printing. |
#3
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In article vMRBc.17$785.16@newsfe3-gui, John
writes Anyone used scanhancer and is it any good? I have a Canon FS4000US but when enlarging my scans of negs and slides they always look grainy (at 4000dpi). I also wondered about the merits of using Vuescan or Silverfast instead of Filmget. Any advice or tips appreciated. I want to get the most detail from my film with minimum grain effect. Scanhancer works, so well in fact that Minolta have adopted it as an integral feature in their flagship scanner. However, it does increase the scan time significantly because it scatters a lot of the light. -- Kennedy Yes, Socrates himself is particularly missed; A lovely little thinker, but a bugger when he's ****ed. Python Philosophers (replace 'nospam' with 'kennedym' when replying) |
#4
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In article , bmoag
writes You are probably aware of all this: if an image is grainy then scanning at 4000dpi will yield an excellent scan of the grain pattern. Unless you have a specific need for a scan that large you may want to consider limiting scan size to 2400 dpi. NO! Scanning at a lower resolution will usually make the grain aliasing worse, depending on the algorithm used by the scan driver. See the discussion on this topic recently in comp.periphs.scanners under the thread "Elitechrome 100 Slide Scanning with Coolscan V ED" for an explanation of why this makes the situation worse. The *correct* way to do this is to scan at the full optical resolution (4000ppi in the case of the FS-4000) and then downsample in one of the better implementations such as Photoshop using bicubic interpolation. Alternatively, filter the image with an appropriate blur radius (half the ratio of original and final resolutions) and then downsample in a non-filtering application. -- Kennedy Yes, Socrates himself is particularly missed; A lovely little thinker, but a bugger when he's ****ed. Python Philosophers (replace 'nospam' with 'kennedym' when replying) |
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