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MetroMPG · 03-10-2009, 11:27 AM

You don't necessarily need to put a ruler in the image; you just need to know the measurement of something of the image.

Then you find the measurement of that item in pixels with the ruler tool, or the select tool (with the "info" window open), and do the math.

EG. let's say your door handle is actually 15 cm across, and in the image it's 90 pixels wide. Pixels per cm = 90/15 = 6.

Is that what you were after?

03-10-2009, 11:27 AM	#2 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,534 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 57.73 mpg (US) Thanks: 4,082 Thanked 6,979 Times in 3,614 Posts	You don't necessarily need to put a ruler in the image; you just need to know the measurement of something of the image. Then you find the measurement of that item in pixels with the ruler tool, or the select tool (with the "info" window open), and do the math. EG. let's say your door handle is actually 15 cm across, and in the image it's 90 pixels wide. Pixels per cm = 90/15 = 6. Is that what you were after? __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget