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Image Import Module #7

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benjaminwinger opened this issue Jun 27, 2015 · 0 comments
Open

Image Import Module #7

benjaminwinger opened this issue Jun 27, 2015 · 0 comments
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@benjaminwinger
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This issue is for more detailed information on the Image Import module as well as for discussion of its implementation and assignment of duties.

Description

Module for creating frames from image and video files and matching them with telemetry information that corresponds to them.

Implementation Ideas

We have two ways of determining capture time for images, the internal timestamp as stored in the exif metadata, and the time recorded in the telemetry that a signal was sent to the camera. The issue is that the first only has second resolution, and the second in unreliable if any of the metadata is missing (as we don't know how many photos were taken in the missing period), however we should be able to use both to get fairly accurate timing. by using the exif timestamp to find a frame's location in the telemetry and the telemetry's recorded time that the plane sent the signal plus whatever delay we measure between when the signal is sent and the camera takes the picture, that way we should be able to get 1/5 second resolution while bypassing the issues of solely using the telemetry.

See http://www.exiv2.org/ for more information on reading exif metadata.

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