The First Motivated Camera

Posted: February 4, 2009 at 8:06 pm

I’ve made my first attempt to remove the random control of the camera’s gaze. This approach is based on an analysis of the histograms of middle, top, right, left, bottom regions of the image. The x and y regions that are most different than the middle control the pan/tilt direction. This was done so that the camera moves over a fixed grid, so that locations that have already been visited could not be revisited. Even with this mechanism the gaze of the camera is highly looped and overlapped. It also tends to get stuck in certain areas. The following plot shows 2667 iterations:

density3.png

The plot starts in the red area and ends up in the green area. The density of the camera’s fixation on certain areas is clear:

density3-density.png

The upper right corner has been visited extremely disproportionately. This is even more extreme when the range of the camera (the area in which the camera is able to look) is included in the plot:

density3-full-field.png

density3-density-full-field.png

The next steps will be to give up on this grid-based approach and calculate a vector from the differences between the various histograms in order to point the camera in a new direction. Since this vector will contain some of the complexity of the image I hope it will not be as likely to get stuck in a certain area.