Tracing object trajectory through a photocamera

AI Thread Summary
To trace the trajectory of a moving yellow and opaque object against a grey background, using light painting techniques is suggested, potentially by applying reflective paint to the object. Alternatives include creating a video and marking the trajectory on tracing paper or utilizing motion detection software to automatically add a trail. Keeping the camera shutter open while using a strobe light can also capture multiple exposures of the object's path. Resources and tutorials, such as those from Video Copilot, may provide additional guidance on implementing these techniques. Exploring these methods can effectively visualize the object's trajectory.
serbring
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Hi all,

I need to trace the trajectory of a moving object. The object are yellow and opaque while the background is grey. Since I'm interested in the shape rather than the exact coordinate, I'm wondering if I could use the light painting principle to impress on a photo the trajectory. How could I do it? By painting the object with any reflective paint? Any suggestion is welcome.

Thanks
 
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One way might be to make a video and put tracing paper over the screen. Play the vid and mark with a pencil.

There are probably some programs out there that will do motion detection for you and add a trail to the path of the moving object.
 
Keep the shutter open.
You could also use a strobe light for multiple exposures while the shutter is open.
 
@Tom G. great idea the stroboscope!

@CWatters: is there any way to mark a video? My desire is to adopt a motion detection algorithm
 

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