System and method for creating unclassified line drawings from classified NTM images
AssigneeThe John Hopkins University
InventorsWilliam C. Walton, Cash J. Costello, Elissa M. Weidaw
Life of this patent
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Abstract
A system and method of automatically creating a NIMA certified line drawing from a National Imagery Transmission Format (NITF) image file. A grayscale (electro-optical) image and its associated metadata from a NITF file is input into the computer based system. Pre-screening operations are performed on the metadata prior to image processing to ensure that National Imagery and Mapping Agency (NIMA) requirements and criteria are met. Image processing algorithms then perform filtering, encoding, edge detection, and custom edge pattern classification procedures to create a declassified line drawing. The line drawing can then be saved in any number of standard commercial file formats.
Claims12
A NIMA certified method of automatically creating a line drawing from a National Imagery Transmission Format (NITF) image file comprising:
- pre-screening the NITF image file to verify that the file meets NIMA criteria, wherein said pre-screening results in an image and a ground sample distance (GSD) parameter for input into a line drawing process;
- and
- performing a line drawing process on the image comprising:
- adjusting the resolution of the image to meet NIMA criteria;
- performing edge detection on the adjusted image;
- chain coding the image to meet NIMA criteria;
- decluttering the chain coded image to meet NIMA criteria resulting in a NIMA certified line drawing.
A NIMA certified system for automatically creating a line drawing from a National Imagery Transmission Format (NITF) image file comprising:
- means for pre-screening the NITF image file to verify that the file meets NIMA criteria, wherein said pre-screening results in an image and a ground sample distance (GSD) parameter for input into a line drawing process;
- and
- means for performing a line drawing process on the image comprising:
- means for adjusting the resolution of the image to meet NIMA criteria;
- means for performing edge detection on the adjusted image;
- means for chain coding the image to meet NIMA criteria;
- means for decluttering the chain coded image to meet NIMA criteria resulting in a NIMA certified line drawing.
Dependencies are inferred from the claim text.