Anyone willing to write an app for Android that uses the camera and measures metres square. I.e. you stand at one side of a room and point at an object on the opposite wall and it then measures that distance, and then you measure the other wall to wall distances and the app calculates the metres squared. Possible?
semigeek: Anyone willing to write an app for Android that uses the camera and measures metres square. I.e. you stand at one side of a room and point at an object on the opposite wall and it then measures that distance, and then you measure the other wall to wall distances and the app calculates the metres squared. Possible?
A camera cannot measure distance accurately, ( at all)
Sure you could make some guesses, but the distance between 2 points close to you will always look longer than 2 points the same distance apart far away.
While we can perceive depth in a photo the CCD can't
you would need to be able to set the true size of an object on the far wall as a reference point. Say you would use a piece of A4 taped to the far wall. You tell the app that you are using an A4 piece of paper. It knows the size of A4 so when it uses the camera, it can work out how far the paper is away from the iphone by it's apparent size on the camera vs it;s actual size, for measuring larger distances you would need to use larger objects for better accuracy.
You could even use it to work out the height of large objects too by triangulating the distance and apparent height to calculate the actual height.
There are already a few apps that do things like that. I have one called SmartMeasure. I think the free version only measures distance, but the pro version can also do height, width, and area. Search for "measure" on AppBrain for a few others.
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