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can photosynth create a 3d model to scale so that you could measure the dimension of an object? for example a house.
If you take good coverage of a subject to get a good clean point cloud, then yes, you could assign a known distance to two points in the reconstruction with a separate modeling tool and expect that measurements made on other parts of the model using that scale will be accurate.
No measurement feature exists in photosynth, as it does in some other photogrammetry tools, but there are several point cloud exporting apps which will give you something to open in a tool with measuring in mind.
http://bit.ly/synthexport http://bit.ly/browsephotosynth http://bit.ly/meshlab http://bit.ly/photosynth-toolkit
Here are a couple of programs aimed at measurement:
Some leads to Photosynth community members' work on converting Photosynth coordinates to real world coordinates: http://bit.ly/psfpsc
Some alternate photogrammetry solutions for your perusal: http://bit.ly/photosynthrivals
do you have any idea what is the difference between photomodeler and photofly other then cost lol. The objects that i am thinking of modeling would be residential and commercial properties..
The last time that I used Photofly it was still an experimental labs project and thus free. It also allows you to make manual matches where the automated matching fails.