Scanning standards
Today I finished scanning the rest of the pieces I had cataloged, make some adjustments in the procedures, did some further comparisons on the brightness/contrast issue with grayscale, and did some research on other institutions' scanning procedures and standards.
It seems that most places scan at 300 dpi, some as high as 400 or even 600, and only a few that scan at 150. If you have the time (the higher the dpi, the longer it takes to scan), I guess it makes the most sense to me to start with 300 dpi for the archival image, and then you can create smaller resolution access images .
I may do some comparisons with the things I'm working on, trying at a higher resolution, to see if the difference is enough to warrant changing procedures. One place said they started at 300 dpi but then ended up changing to 400 dpi because they felt the difference was that noticeable. Another place claimed that 300 dpi was necessary (as opposed to 150) for clarity, detail, and color fidelity particularly in the printing version of the image.
So, I guess it depends on your resources and what your time frame is. Obviously, higher dpi will give you better results.
I want to look at a few digitizing guides that I found during my digital archives and records management class and my digital libraries class, especially the Howard Besser (Getty) one, since he pretty much is "it" in the digital archiving world.
Hours today: 2.5 (4:15-6:45)
Total hours completed: 56
It seems that most places scan at 300 dpi, some as high as 400 or even 600, and only a few that scan at 150. If you have the time (the higher the dpi, the longer it takes to scan), I guess it makes the most sense to me to start with 300 dpi for the archival image, and then you can create smaller resolution access images .
I may do some comparisons with the things I'm working on, trying at a higher resolution, to see if the difference is enough to warrant changing procedures. One place said they started at 300 dpi but then ended up changing to 400 dpi because they felt the difference was that noticeable. Another place claimed that 300 dpi was necessary (as opposed to 150) for clarity, detail, and color fidelity particularly in the printing version of the image.
So, I guess it depends on your resources and what your time frame is. Obviously, higher dpi will give you better results.
I want to look at a few digitizing guides that I found during my digital archives and records management class and my digital libraries class, especially the Howard Besser (Getty) one, since he pretty much is "it" in the digital archiving world.
Hours today: 2.5 (4:15-6:45)
Total hours completed: 56
posted by Amy | 4:38 PM
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