CAD/PhotoShop guru's

[BPTactical]

Is there anyway to get accurate dimensions off of an object in a photo?
I have known dimensions of a couple of components that are on the object.
Specifically it is a vehicle chassis and I have multiple photos and angles.

Ideas

[palepainter]

I can help you with that Bert. I have to do that a lot with guitars.

[Dr_Fwd]

Year, make, model? What part?
Did you try to Google it?

[BPTactical]

Year, make, model? What part?
Did you try to Google it?

Won't work, all custom fabrication.

PalePainter seems to have it figured out pretty well, thanks

[BigBear]

If Palepainter doesn't help, send me a PM. I'll ask one of the CAD teachers in the building.

[soldier-of-the-apocalypse]

you can get a frame machine map for prety much any car and it tells exact measurements

[BPTactical]

you can get a frame machine map for prety much any car and it tells exact measurements

Not this one

[wrestler034]

How accurate do you need?

[BPTactical]

1/8" should be acceptable.

[bogie]

ImageJ is free and easy to use image analysis software funded by we the taxpayer. Once you calibrate the image to a known scale you can measure anything on the picture as long as its in the same focal plane as the scale. So if you have a ruler in the picture you can use that as your calibration, then draw just about any shape and compute length, area, angle... all kinds of schtuff

http://rsbweb.nih.gov/ij/download.html

If you go this route, let me know if you need some help setting up your first calibration.