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VK2TV > SCAN 24.03.08 00:00l 62 Lines 1814 Bytes #999 (0) @ WW
BID : 35468_VK2TV
Read: GUEST
Subj: Re:Need Scan size info.
Path: IZ3LSV<IW2OHX<IR2UBX<IV3SCP<SR1BSZ<ON4HU<DB0RES<DK0WUE<7M3TJZ<F6CDD<
F6BVP<VK2TV
Sent: 080323/2148Z @:VK2TV.#MNC.NSW.AUS.OC #:34903 [Kempsey, QF68JX] $:35468_VK
From: VK2TV@VK2TV.#MNC.NSW.AUS.OC
To : SCAN@WW
# Generated by: TstHWin v2.21b - Registered to VK2TV
# On : 3/24/2008 8:41:10 A
# UTC: 3/23/2008 21:41:10
>From: ZR2ACJ@ZS0ELD.ELD.ZAF.AF
>To : SCAN@WW
>
>ZR2ACJ/TPK 1.82 Msg N§:226 Date:22-03-08 Time:10:20 SAST (-2HRS for Z)
>
>Hi all,
>Thanks for interest.
>
>I need info as how much (dots per inch etc.) to scan a circuit diagram, so
>that it can be sent 7+ and not make the receiver have a heart attact!.
>
>Also what version to save it in...Eg: JPG, TIF etc.
>
>The circuit in question, is a photo copy, in black and white.
>
>Size: 105mmlong by 45mm wide and paper thickness is 0.01mm (Oh! thickness
>does'nt matter)...Hi hi!.
>
>My try was: Scan at 100 DPI (Line art) and saved as JPG.
>
>Final 7+ files were 9 of 10.015kb and 1 of 7.246kb.
>
I just did a test here on a .ppm (Portable PixMat) image that is 17.28MB
The output files and sizes are
tif - 17.3MB
png - 2.04MB (Portable Network Graphics)
jpg - 1.47MB (100 percent quality)
jpg - 0.22MB (50 percent qyuality)
The jpg quality setting is from the slider in Irfanview, which I used to
convert from ppm. Some conversion programs add their own junk to a file,
Irfanview appears to not do that (and it's totally free)
The 50 percent image showed quite noticeable degradation of image quality,
all others looked fine to a "quick glance" for detail.
The source image, a radio coverage plot, was 2400 x 2400 pixels.
I hope this helps someone.
As for 7+ files sizes, I'm sure there's at least one sysop in the world who
considers a one byte 7+ file to be too big.
I doubt the majority would baulk at say ten files of 9k each.
I just wish that those who send 7+ files would send a plain text message in
advance of the 7+ components to advise what the image is.
Cheers ... Ray vk2tv
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