Ricoh Aficio 2022/Lanier LD122 Scanning Questions

[Guest]

Two questions regarding scanning with the Aficio 2022/LD122:

1) Is there an upgrade or setting that will allow it to scan at 600 dpi in gray scale mode? I get an "Exceeded max. data capacity." message when I try this. (The 128MB memory chip has already been replaced by a 256MB chip.)

2) The available scan resolutions are 100dpi, 200dpi, 300dpi, 400dpi and 600dpi. My understanding is that this model is limited to 600dpi. If so, then the 400dpi would have to be interpolated (with some image artifacts), since it isn't evenly divisible into 600. Is this the case, or is the CCD unit really 1200dpi?

Thanks for the assistance!

[teebee1234]

Re: Ricoh Aficio 2022/Lanier LD122 Scanning Questions

1) Grayscale is 8 bit jpeg and will give a substantially larger size than Text mode (1bit). Not too much you can do except make sure compression is set to High and reduce the resolution in the scanner settings. If you change it to Text or Text/Photo and set compression to MMR and PDF as the file type, which should be smaller than grayscale (jpeg). If you are scanning to email, turn off Max Email Size in Scanner User Tools.
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This is from the CORE manual

Grayscale Processing
Grayscale processing uses many shades of grey to reproduce continuous tone originals, such as
those containing photographs. A black and white photograph contains an unlimited number of
shades of grey, but digital copiers and printers can normally only output a few shades, normally 64 or
256.
If grayscale processing is used, the digital image processing circuit outputs, to the memory or laser
diode driver, the result of all the previous enhancement and filtering processes, without any error
diffusion or dithering. The result is a multi-bit per pixel stream of digital data. For example, if there are
256 shades of grey, there are eight bits per pixel.
Note that grayscale processing needs a lot of memory. At eight bits per pixel (256 shades of grey),
an A4 or LT page needs about 14 megabytes, without compression.
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2) The CCD is 600dpi and always scans at that resolution, the other resolutions are created by conversions done in the IPU (the subscan resolution is controlled by the scanner speed).
*attached is reference guide from Ricoh in regards to file size settings and a chart from the 2022 manual

[copyaction]

Re: Ricoh Aficio 2022/Lanier LD122 Scanning Questions

If you are scanning to email it is there the max size is being exceeded, not the copier.

[sylerner]

Re: Ricoh Aficio 2022/Lanier LD122 Scanning Questions

1) Grayscale is 8 bit jpeg and will give a substantially larger size than Text mode (1bit). Not too much you can do except make sure compression is set to High and reduce the resolution in the scanner settings. If you change it to Text or Text/Photo and set compression to MMR and PDF as the file type, which should be smaller than grayscale (jpeg). If you are scanning to email, turn off Max Email Size in Scanner User Tools.
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Thanks for the detailed information.

I already had Max Email Size turned off, but I'll try setting the compression to high instead of medium.

I'm aware that grayscale files are larger than B&W (and color larger still). But I had hoped that my upgrade from 64+128MB to 64+256MB would have provided sufficient buffer for even one page.

However, since I get the error message immediately upon trying to scan the first page, I don't think that Max Email Size or compression are the factor. It seems that there is a fixed amount of RAM dedicated as a raw scan data buffer which captured scan data while the scan is taking place. My guess is that once the page scan has finished, this buffer is processed and added to the job file.

My hope had been that there would be a setting that could adjust how much memory was set aside for use as a scan buffer.

I can get a letter size sheet to scan in grayscale at 300 and 400dpi -- I just would have preferred the higher resolution.

And since 400dpi is not factor evenly into 600dpi, I'll just use 300dpi resolution for grayscale.

Thanks for the assist.