43 panoptic quality metrics

[Johansmm]

Development of PQmetric and PQMetricsCallback modules, to measure Panoptic Quality metric.

Important changes:

• Update CocoPanopticDataset to read and handled multiples labels: ['category','isthing','supercategory']
• Implement ApMetricsCallbacks and PQMetricsCallbacks base on BaseMetricsCallbacks, in order to use any metric with add_sample function.
• Update LitPanopticDetr and create PanopticApMetricsCallbacks, that transform (if the procedure required it) the labels in aloscene.Labels object (keep only 'category' label)', to handled the same pipeline that Detr model.
• Update in aloscene.Mask.masks2id function (called aloscene.Mask.masks2panoptic before) to return annotations (use just in get_view function) if desired and fix silence problem in wrong changes of ids.

Some problems fixed:

• aloscene.Mask.getview: Render aloscene.BoundingBoxes2d and aloscene.Mask from multiples labels. Tested cases:

# boxes with multiples labels (using append_labels function and name parameter)
boxes2d.get_view(labels_set="category").render() # Render category-boxes without background image
boxes2d.get_view().render() # Render boxes without background image and boxes with the same color

# masks with multiples labels
masks.get_view(labels_set="category").render() # Render category-masks without background image
masks.get_view().render() # Render masks without background image and different color for each object with the same color (regardless of whether they are in the same category or not)

# Frame with boxes and segmentation attributes (not None value)
# Render specific views, each with category as labels
views = [fr.boxes2d.get_view(fr, labels_set="category") for fr in frames]
views += [fr.segmentation.get_view(fr, labels_set="category") for fr in frames]
frames.get_view(views).render()

# Render all in frame (4 views per frame in batch: boxes, segmentation, mask and frame)
frames.get_view(labels_set="category").render() # Render a specific label set
frames.get_view().render() # Render all boxes with same color and diff color for each object-masks 

Important note:
This feature requires first approve and merge #73. The changes present in the new update not mentioned are part of #73

Closes #43

[thibo73800]

When this pull request should be merged ? It look there is a lot of overlap with an other pull request I just reviewed

[thibo73800]

Just curious, what is the reason for using mergeable True for the labels ?

[Johansmm]

@thibo73800 , actually I see BoundingBoxes2d have the labels as mergeable. so i used the same logic

[Johansmm]

@thibo73800 I updated PQmetric, fixing a problem in calculus. Now is ready to merge