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US 8,559,753 B2Granted
Reflection removal system
AssigneeThe Boeing Company
InventorRobert Merrill Cramblitt
Life of this patent
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Abstract
A method and apparatus for removing undesired features in an image. The image is converted from a spatial domain to a frequency domain to form a transformed image. A filter is applied to the transformed image to form a filtered image in the frequency domain. The filtered image is converted from the frequency domain back into the spatial domain to form a modified image. An intensity of an undesired feature in the modified image is increased as compared to the intensity of the undesired feature in the image. The undesired feature is removed from the image using the modified image to form a processed image.
Claims18
A method for removing an undesired feature in an image, the method comprising:
- converting the image from a spatial domain to a frequency domain to form a transformed image;
- applying a filter to the transformed image to form a filtered image in the frequency domain;
- converting the filtered image from the frequency domain back into the spatial domain to form a modified image, wherein an intensity of the undesired feature in the modified image is increased as compared to the intensity of the undesired feature in the image;
- and
- removing the undesired feature from the image, wherein removing the undesired feature comprises:
- applying a threshold to the modified image in which pixels in the modified image having values greater than the threshold are retained to form a thresholded image;
- convolving the modified image with a point spread function for the image to form a convolved image, wherein the convolved image indicates a first location for the undesired feature in the convolved image that corresponds to a second location for the undesired feature in the image;
- and
- subtracting the convolved image from the image to form a processed image, wherein a portion of the image at the second location for the undesired feature in the image is removed from the image to remove the undesired feature.
6 more elements
An apparatus comprising:
- a computer system configured to convert an image from a spatial domain to a frequency domain to form a transformed image;
- apply a filter to the transformed image to form a filtered image in the frequency domain;
- convert the filtered image from the frequency domain back into the spatial domain to form a modified image, wherein an intensity of an undesired feature in the modified image is increased as compared to the intensity of the undesired feature in the image;
- and remove the undesired feature from the image, wherein in being configured to remove the undesired feature, the computer system is configured to apply a threshold to the modified image in which pixels in the modified image having values greater than the threshold are retained to form a thresholded image;
- convolve the modified image with a point spread function for the image to form a convolved image, wherein the convolved image indicates a first location for the undesired feature in the convolved image that corresponds to a second location for the undesired feature in the image;
- and subtract the convolved image from the image to form a processed image, wherein a portion of the image at the second location for the undesired feature in the image is removed from the image to remove the undesired feature.
3 more elements
A vehicle inspection system comprising:
- a sensor system configured to generate images of a vehicle;
- an image processor configured to receive an image from the sensor system;
- convert the image from a spatial domain to a frequency domain to form a transformed image;
- apply a filter to the transformed image to form a filtered image in the frequency domain;
- convert the filtered image from the frequency domain back into the spatial domain to form a modified image, wherein an intensity of an undesired feature in the modified image is increased as compared to the intensity of the undesired feature in the image;
- and remove the undesired feature from the image wherein in being configured to remove the undesired feature from the image using the modified image to form the processed image, a computer system is configured to apply a threshold to the modified image in which pixels in the modified image having values greater than the threshold are retained to form a thresholded image;
- convolve the modified image with a point spread function for the image to form a convolved image, wherein the convolved image indicates a first location for the undesired feature in the convolved image that corresponds to a second location for the undesired feature in the image;
- and subtract the convolved image from the image to form the processed image, wherein a portion of the image at the second location for the undesired feature in the image is removed from the image to remove the undesired feature;
- and
- an image analyzer configured to analyze the processed image to determine whether an inconsistency is present in the vehicle.
7 more elements
Dependencies are inferred from the claim text.