jywarren
commented
6 years ago :-) this'd be really cool. i've wanted this for a long time! Some things to consider:
- how would the grid distortion be stored in a serialized form? a matrix of x,y offsets?
- any existing JS libraries to do mesh warping? (i think i've seen some, but preference for ones which use WebGL)
- maybe interesting to use an abstraction library like https://github.com/jywarren/webgl-distort
On Mon, Aug 27, 2018 at 10:17 PM Chris Lowe notifications@github.com wrote:
Details of image morphing here: http://davis.wpi.edu/~matt/courses/morph/2d.htm
The rationale is as follows. Aerial imagery taken from drones or planes have a much wider field of vision compared to satellite which is effectively zero. As such you can end up with an image that perfectly aligns at the edges but is internally inconsistent with the underlying features. Corner distortion can only go so far when you want very high accuracy.
I'm suggesting a grid base image morph similar to photoshops warp. When the user selects the warp the image will have a grid drawn on top. The user can drag individual verticies or grid lines which warp the image without changing the position.
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Details of image morphing here: http://davis.wpi.edu/~matt/courses/morph/2d.htm
The rationale is as follows. Aerial imagery taken from drones or planes have a much wider field of vision compared to satellite which is effectively zero. As such you can end up with an image that perfectly aligns at the edges but is internally inconsistent with the underlying features. Corner distortion can only go so far when you want very high accuracy.
I'm suggesting a grid base image morph similar to photoshops warp. When the user selects the warp the image will have a grid drawn on top. The user can drag individual verticies or grid lines which warp the image without changing the position.