EFFECT OF DISPARITY IN PHOTO SCALE AND ORIENTATION ON CHANGE DETECTION
Technical research note
BOEING CO SEATTLE WA
Pagination or Media Count:
Change detection is most complete and reports on target change detected are more accurate when the aerial photos compared are the same scale and are displayed with a common directional orientation. Significant decrement in completeness and accuracy is normally associated with additional increments of scale disparity between the two photos. Both completeness and accuracy were degraded also when the two photos are not displayed in the same directional orientation. A small degree of misalignment, however, appears to affect completeness more than it does accuracy. These results provide clear indication that display systems for comparative cover analysis should include scale rectification and reorientation capability. The functional relationship between scale disparity and orientation misalignment needs to be determined so that rectification capability may be of the required precision. Increasing the time allowed for comparing photos can offset discrepancies in the imagery--or lack of corrective devices--with respect to completness.
- Cartography and Aerial Photography