A method and apparatus for detecting motion in a large area with a single imaging device, such as a camera. A fixed object is located in the area and a camera is panned across the area with the fixed object remaining in the field of view of the camera. Successive images are adjusted based on the pos
A method and apparatus for detecting motion in a large area with a single imaging device, such as a camera. A fixed object is located in the area and a camera is panned across the area with the fixed object remaining in the field of view of the camera. Successive images are adjusted based on the position of the fixed object within the image and the adjusted images are compared to detect movement with an area of overlap between the images.
대표청구항▼
What is claimed: 1. An apparatus for detecting motion in an area, the apparatus comprising: an imaging device having a field of view that is smaller than the area; means for moving the field of view to vary the portion of the area that is covered by the field of view; means for storing a first set
What is claimed: 1. An apparatus for detecting motion in an area, the apparatus comprising: an imaging device having a field of view that is smaller than the area; means for moving the field of view to vary the portion of the area that is covered by the field of view; means for storing a first set of image data captured by said imaging device when the field of view covers a first portion of the area and for storing a second set of image data captured by said imaging device when the field of view covers a second portion of the area, the second portion including a sub area that overlaps a sub area of the first portion to define an overlapping area; means for determining a fixed object image portion in the overlapping area; means for adjusting at least one of the first set of image data and the second set of image data based on the fixed object image portion and generating two sets of adjusted image data, each of the two sets of adjusted image data including overlapping area data corresponding to the overlapping area; and means for comparing the overlapping area data of the two sets of adjusted image data to determine if any objects in the overlapping area have moved. 2. An apparatus as recited in claim 1, wherein the imaging device is a camera. 3. An apparatus as recited in claim 1, wherein the means for moving moves the field of view in successive increments to cause the field of view to traverse substantially the entire area while the fixed object image portion remains in the field of view and the first set of image data and the second set of image data respectively correspond to two successive images captured by said camera that correspond to successive increments of the field of view. 4. An apparatus as recited in claim 1, wherein the means for storing comprises a memory device and wherein the means for determining, the means for adjusting, and the means for comparing all comprise a programmed microprocessor based device. 5. An apparatus as recited in claim 1, wherein the means for moving comprises means for rotating the imaging device about an axis. 6. An apparatus as recited in claim 1, wherein the means for moving comprises means for moving the imaging device linearly. 7. An apparatus as recited in claim 1, wherein the means for moving comprises means for adjusting optics associated with the imaging device to thereby change the field of view. 8. An apparatus as recited in claim 1, wherein the means for determining comprises a display and a selection device operative to choose portions of an image from the display. 9. An apparatus as recited in claim 1, wherein the means for determining comprises a software algorithm executed by a processor for automatically determining a fixed object image portion. 10. An apparatus as recited in claim 9, wherein the means for determining determines a fixed object image portion by comparing successive image data of a test field of view to determine a reference image portion having a fixed object therein and compares the reference image portion with portions of the first and second image data. 11. A method for detecting motion in an area of interest, the method comprising: (a) capturing, with an imaging device, first image data in a field of view of the imaging device, the first image data corresponding to a first portion of an area of interest; (b) changing, with a panning mechanism, the field of view of the imaging device; capturing, with the imaging device, second image data in the field of view of the imaging device, the second image data corresponding to a second portion of the area of interest, the second portion including a sub area that overlaps a sub area of the first portion to define an overlapping area; (c) determining a fixed object image portion in the overlapping area; (d) adjusting at least one of the first image data and the second image data based on the fixed object image portion and generating two sets of adjusted image data, each of the two sets of adjusted image data including overlapping area data corresponding to the overlapping area; and (e) after the step of adjusting at least one of the first image data and the second image data, determining if motion has occurred in the overlapping area by comparing the overlapping area data of the two sets of adjusted image data. 12. The method as recited in claim 11, wherein the steps (a) through (e) are repeated until substantially the entire area of interest has been monitored. 13. The method as recited in claim 11, further comprising: capturing, with the imaging device, test image data in the field of view of the imaging device, the test image data corresponding to the area of interest including the fixed object; determining fixed object data of the test image data corresponding to the fixed object; and storing the fixed object data as learned image data, wherein the step (c) comprises determining the fixed object portion according to the learned image data. 14. The method as recited in claim 13, wherein the step of determining fixed object data comprises displaying the test image data on a display and receiving, via a selection device, a selection of the fixed object data. 15. The method as recited in claim 13, wherein the step of capturing the test image data is repeated, and the step of determining fixed object data comprises comparing the successively captured test image data. 16. The method as recited in claim 13, wherein the step of determining fixed object data comprises executing a software algorithm for automatically determining the fixed object data.
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이 특허에 인용된 특허 (4)
Beged-Dov, Gabriel; Jones, Michael J; Mull, Russell, Alignment of images for stitching.
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