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Archiver > TMG > 2008-07 > 1217300871


From: Pierce Reid <>
Subject: Re: [TMG] OT saving digital images TIFF vs JPEG
Date: Mon, 28 Jul 2008 23:07:51 -0400 (EDT)
In-Reply-To: <mailman.110128.1217294475.4462.tmg@rootsweb.com>


JPEG files loose some of their "accuracy" when saved as a compressed file. However, that is only important when you loose detail that you need.

When saving a document image, such as a census image, you basically want to accurately read the text that is written on the document. The precision that is normally provided by various image data base providers is usually much more than you need to glean the information the creator put on the paper.

I find that I can greatly reduce the file size without loosing any useful detail. In fact, I have been able to reduce a file size of over 1 meg to more like 100 kbytes and I cannot detect any difference when comparing the files magnified over 10 times.

If you have a program that lets you control the compression of JPEG files, such as irfanview, you can experiment with different compressions to see what causes a problem reading the information on the form.

Pierce

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