Change Detection System
A change detection system including an image analysis unit that analyzes an image gathered from an image gathering unit, a change detection unit that detects changes in a plurality of images taken over a predetermined time, where the change detection unit modifies the image to indicate areas where a change has occurred.
1 . A method of detecting a change in an agricultural field including the steps of:
gathering a first image from an aerial device;
separating the first image into a plurality of tiles of a predetermined size by an image analysis unit;
determining the geo location of each tile in the image;
performing an Otsu binary thresholding on a tile in the first image;
assigning a vegetation mask having an analog value greater than 0 to each pixel in the tile based on the Otsu binary thresholding with pixels not assigned to vegetation being assigned a value of 0,
performing, via an image analysis unit, a pixel by pixel analysis of each pixel in the tile with a vegetation mask greater then 0;
retrieving from memory at least one previously analyzed version of the tile;
comparing the analyzed tile to the at least one previously analyzed tile to determine any change in the tile; and
marking an area on the image to indicate change has been detected in the tile.
2 . The method of claim 1 , including the step of selecting an adjacent tile to the previous tile selected.
3 . The method of claim 2 , including the step of performing an Otsu binary thresholding on the adjacent tile first image.
4 . The method of claim 3 , including the step of assigning a vegetation mask having an analog value greater than 0 to each pixel in the adjacent tile based on the Otsu binary thresholding with pixels not assigned to vegetation being assigned a value of 0.
5 . The method of claim 4 , including the step of performing, via an image analysis unit, a pixel by pixel analysis of each pixel in the adjacent tile with a vegetation mask greater then 0.
6 . The method of claim 5 , including the step of combining the tile and the adjacent tile into a single tile.
7 . The method of claim 6 , including the step of retrieving a previously analyzed tile and previously analyzed adjacent tile.
8 . The method of claim 7 , including the step of combining the previously analyzed tile and previously analyzed adjacent tile into a single tile.
9 . The method of claim 8 , including the step of comparing the combined tile to the combined previously analyzed tile to determine a change in the combined tile.
10 . The method of claim 9 , including the step of using the geo location information of the combined tile to indicate the area of change on the first image.
11 . A change detection unit including a processor executing a series of steps including:
gathering a first image from an aerial device;
separating the first image into a plurality of tiles of a predetermined size by an image analysis unit;
determining the geo location of each tile in the image;
performing an Otsu binary thresholding on a tile in the first image;
assigning a vegetation mask having an analog value greater than 0 to each pixel in the tile based on the Otsu binary thresholding with pixels not assigned to vegetation being assigned a value of 0,
performing, via an image analysis unit, a pixel by pixel analysis of each pixel in the tile with a vegetation mask greater then 0;
retrieving from memory at least one previously analyzed version of the tile;
comparing the analyzed tile to the at least one previously analyzed tile to determine any change in the tile; and
marking an area on the image to indicate change has been detected in the tile.
12 . The method of claim 11 , including the step of selecting an adjacent tile to the previous tile selected.
13 . The method of claim 12 , including the step of performing an Otsu binary thresholding on the adjacent tile first image.
14 . The method of claim 13 , including the step of assigning a vegetation mask having an analog value greater than 0 to each pixel in the adjacent tile based on the Otsu binary thresholding with pixels not assigned to vegetation being assigned a value of 0.
15 . The method of claim 14 , including the step of performing, via an image analysis unit, a pixel by pixel analysis of each pixel in the adjacent tile with a vegetation mask greater then 0.
16 . The method of claim 15 , including the step of combining the tile and the adjacent tile into a single tile.
17 . The method of claim 16 , including the step of retrieving a previously analyzed tile and previously analyzed adjacent tile.
18 . The method of claim 17 , including the step of combining the previously analyzed tile and previously analyzed adjacent tile into a single tile.
19 . The method of claim 18 , including the step of comparing the combined tile to the combined previously analyzed tile to determine a change in the combined tile.
20 . The method of claim 19 , including the step of using the geo location information of the combined tile to indicate the area of change on the first image.