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I have a question about how to approach a specific project. I produce forensic visuals – videos and animations for courtroom presentations. The work must always be an accurate representation of scenes and events that will be accepted by the court.
The job involves about 2 miles of rural state highway. The goal is to reproduce the condition of the highway as of the time of an accident. The highway had been newly paved and did not have the final striping applied yet, there were only some thin painted dashes and some white and orange temporary maker tabs along the center and edge striping lines. I shot the road from an appropriate vehicle at 60 mph with my Red camera at 4K 30fps. My plan is to track the camera motion (with PFTrack) and model the road surface and temporary striping marks from topographic survey data provided by the department of transportation (mostly done now). What I would like to do is remove the final striping from the Red video and composite the CG road surface temporary striping and maker tabs over the video footage. My big question for Nuke, Shake or AfterEfects: How best to remove the striping in the Red video to provide a clean road surface to receive the CG striping and tabs? My first thought is to clone nearby road surface over the striping. Maybe clone/reveal from an offset copy of the video? Lots of masking/roto I suppose, to follow the camera motion and the changing in striping position and patterns. I would like to semi-automate this due to the number of frames involved. Would the Nuke wire removal or other plugins be useful.? I am concerned about getting a clean road surface without artifacts from the striping removal process, while preserving as much of the road surface texture as possible. I’m attaching a link to two frames from the video and three photos of the roadway to give an idea of the situation. Any suggestions would be appreciated. Deadlines loom…
[IMG]http://www.flickr.com/photos/mamayda/sets/72157615194596480/[/IMG]
The road surface is darker than the stripes, I imagine- make a copy of the footage, place it over the original, set to a “darken” type operation (where it’ll only replace areas that are lighter in the original), then translate it to the side until blank road is replacing all of the stripes. Do a quick garbage mask for the area to be affected and feather it out. You should have dark pavement covering all your lighter stripes.
Great suggestion. Thank you, I will give that a go.
Mike
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