Clean up result

[automata]

Now we have the following as result:

saliency:
  bounding_rect: <array of arrays as points> box around biggest salient region
  polygon: <array of arrays as points> approximate polygon around biggest salient region
  center: <array as point> center of biggest salient region
  radius: <number> radius of the approx enclosing circle around biggest salient region

We should have the following, preserving the original fields for a while:

saliency:
  bbox: <array of objects> box around all regions
  confidence: <number> inverse/normalized entropy of saliency map histogram
  regions: <array of objects> [ 
    bbox: <array of objects> box around salient region
    polygon: <array of objects> polygon around salient region
    center: <object> center point of salient region
    radius: <number> radius of the approx enclosing circle around salient region
  ]

In this way, we should remove saliency.bounding_rect, saliency.polygon, saliency.center and saliency.radius because a saliency is composed by many regions. The only information regarding all those regions is the saliency.bbox that encloses them. If one wants to draw or use polygon of the saliency, it should iterate over all saliency.regions's bboxes.

We also should have a standard object to bboxes ({x: ?, y: ?, width: ?, height: ?}) and points ({x: ?, y: ?}).

[forresto]

Would each object in regions also have confidence? Do low-confidence polygons expand the containing bbox?

[automata]

No confidence for each region for now. We can see them as a group of pieces that builds the saliency.bbox. So saliency.bbox have all saliency.regions's bboxes inside. We can add confidence for each region in a future release and have a threshold to discard low confidence regions in saliency.bbox (?)

The real important information for now is saliency.bbox and we can display saliency.regions's bboxes in places like alan-view (however, the most informative thing there is scene). We can group saliency.regions's bboxes in a near future tho, probably making them a better saliency.polygon.

[automata]

7586c53 implements this clean up and standardize bboxes/points, while keeping saliency.bounding_rect, saliency.polygon, saliency.center and saliency.radius, trying to smoothly migrate them to new fields on places like alan-view.