Adding bearing_angle image to pcl

[ZhuangYanDLUT]

To represent a 3D laser point cloud in a more simpli?ed way, a Bearing Angle(BA) model was employed to transform a 3D point cloud into a 2D image in pcl/bearing_angle, so that image processing methods can be used in many aspects.

Bearing Angle is defined as the angle between the laser beam and the segment connecting two consecutive measurement points (see Fig. 1). Grey values for a Bearing Angle image are proportional to the reflected laser light energy, which depends not only on how far away the measured object is from the scanner but also on the surface characteristics of the object.

Fig. 1 The Bearing Angle is calculated along the diagonal direction

[ZhuangYanDLUT]

How should I solve it?

[jspricke]

Never mind the Travis error, we are still working on that.

• I would propose to move the files into common/range_image, as it's most similar to that stuff.
• Can you come up with some unit tests?

[jspricke]

Moved to #198.