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Old 25th November 2012, 05:25 AM   #1
diyAudio Member
Join Date: Feb 2011
Location: Calgary
Default Advice for posting schematics

I do not know what is the correct forums for this, so here I am.

I have seen, here and elsewhere, schematics posted as JPEG (jpg) files.

JPEG tends to blur pixels together. JPEG was designed to work well for photographic material - pics of people, of landscapes, of stuff that the mind's eye can fill in the fine points. This makes it difficult sometimes to distinguish "10nF" from "10mF" on highly compressed JPEG schematics.

Better for schematics are GIF and PNG files, because they do not blur pixels together: GIF & PNG tend to produce more readable technical drawings, including schematics.
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Old 25th November 2012, 11:17 AM   #2
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Nikolas Ojala's Avatar
Join Date: Aug 2004
Location: Finland
Thumbs up I agree

Originally Posted by emerth View Post

Better for schematics are GIF and PNG files, because they do not blur pixels together: GIF & PNG tend to produce more readable technical drawings, including schematics.
I agree 100%.

If the image editor program asks questions about quality of the picture, adjust it to maximum, because usually the file will not be too big.
High-order harmonics are more offensive than low.
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Old 25th November 2012, 12:13 PM   #3
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
I use irfanview.
It allows export in many file types/compressions.

I usually never remember which compression suits different types. So I usually export the same pic to the desktop, in 4 or 5 versions. Throw away the enormous files. Look at the smaller files and select the compression type that gives good legibility.

Then go to advanced - manage attachments - browse to DESKTOP - upload - close

Can Irfanview do pdf?
regards Andrew T.
Sent from my desktop computer using a keyboard
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