Method for spectral-spatial-temporal image detection

摘要

A method of spectral-spatial-temporal image detection is disclosed. In one embodiment, a spectrally differenced image is obtained by computing a difference of at least two intensity values in at least two spectral bands of an image. Further, a spatially filtered spectral image is obtained by applying a spatial median filter to the obtained spectrally differenced image. Furthermore, a temporal image is obtained by determining a temporal pixel value difference using a computed predictive frame difference. In addition, a spectral-spatial-temporal filtered image for detection is obtained by using the obtained spatially filtered spectral image and the temporal image.

主权项

1. A method of spectral-spatial-temporal image detection, comprising:
obtaining a spectrally differenced image by computing a difference of at least two intensity values in at least two spectral bands of an image; obtaining a spatially filtered spectral image by applying a spatial median filter to the obtained spectrally differenced image, comprising:
applying a median filter that is based on computing a median value of a 3×3 pixel area around a target pixel and :subtracting the computed median value from the target pixel value to remove a spectral bias and also to act as a point source filter; obtaining a temporal image by determining a temporal pixel value difference using a computed predictive frame difference; and obtaining a spectral-spatial-temporal filtered image for detection by multiplying at least one pixel value in the obtained spatially filtered spectral image by at least one pixel value from the temporal image.