Path planning method and related navigation device
First Claim
1. A path planning method applied to a navigation device, the path planning method comprising:
- acquiring a two-dimensional depth map;
dividing an effective region on the two-dimensional depth map into a plurality of analyzed areas;
classifying pixel values inside each analyzed area in accordance with a predetermined gray value range;
arranging a classifying result into a gray interval along variation of the predetermined gray value range;
forming a gray distribution map by merging gray intervals transformed from the plurality of analyzed areas, wherein a summation of pixel counts inside the gray interval is equal to an amount of the pixel values inside the corresponding analyzed area;
computing a space matching map by arranging the pixel counts on the gray distribution map; and
computing a weighting value about each angle range of the space matching map in accordance with a distance from location of a pixel count to a reference point of the space matching map, wherein the weighting value represents existential probability of an obstacle within the said angle range and a probable distance between the navigation device and the obstacle.
1 Assignment
0 Petitions
Accused Products
Abstract
A path planning method applied to a navigation device includes acquiring a two-dimensional depth map, transforming the two-dimensional depth map into a gray distribution map via statistics of pixel values on the two-dimensional depth map, computing a space matching map by arranging pixel counts on the gray distribution map, and computing a weighting value about each angle range of the space matching map in accordance with a distance from location of a pixel count to a reference point of the space matching map. The weighting value represents existential probability of an obstacle within the said angle range and a probable distance between the navigation device and the obstacle.
-
Citations
26 Claims
-
1. A path planning method applied to a navigation device, the path planning method comprising:
-
acquiring a two-dimensional depth map; dividing an effective region on the two-dimensional depth map into a plurality of analyzed areas; classifying pixel values inside each analyzed area in accordance with a predetermined gray value range; arranging a classifying result into a gray interval along variation of the predetermined gray value range; forming a gray distribution map by merging gray intervals transformed from the plurality of analyzed areas, wherein a summation of pixel counts inside the gray interval is equal to an amount of the pixel values inside the corresponding analyzed area; computing a space matching map by arranging the pixel counts on the gray distribution map; and computing a weighting value about each angle range of the space matching map in accordance with a distance from location of a pixel count to a reference point of the space matching map, wherein the weighting value represents existential probability of an obstacle within the said angle range and a probable distance between the navigation device and the obstacle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. A navigation device with a path planning function, the navigation device comprising:
-
a data communication unit adapted to acquire a two-dimensional depth map; and a computing processor electrically connected with the data communication unit and adapted to analyze a two-dimensional depth map, to transform the two-dimensional depth map into a gray distribution map via statistics of pixel values on the two-dimensional depth map, to select a grid on the space matching map, to search a corresponding pixel count on the gray distribution map related to the selected grid, to apply a predetermined mask onto the corresponding pixel count and adjacent pixel counts to acquire a computed value filled in the selected grid, and to acquire a weighting value about each angle range of the space matching map in accordance with a distance from location of a pixel count to a reference point of the space matching map; wherein the weighting value represents existential probability of an obstacle within the said angle range and a probable distance between the navigation device and the obstacle.
-
Specification