Claims
- 1. 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.
- 2. The method of claim 1 further comprising performing a region identification process comprising:
selecting seed points in the pre-screened image that delineate a region of interest; selecting a sensitivity setting that determines the degree of precision that the region will be detected; requantizing the image to 16 graylevels using an equal probability quantization technique; determining the image block size based on the GSD parameter; computing the global level co-occurrence matrix (GLCM) to capture the spatial statistical dependency of pixels in each block; computing texture features; determining a threshold based on the sensitivity setting; and segmenting the image by region growing to produce a visually identifiable region in the line drawing.
- 3. The method of claim 1 wherein the resulting line drawing is saved in tif file format.
- 4. The method of claim 1 wherein the resulting line drawing is saved in png file format.
- 5. The method of claim 1 wherein the resulting line drawing is saved in jpg file format.
- 6. The method of claim I wherein the resulting line drawing is saved in nitf file format.
- 7. 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.
- 8. The system of claim 7 further comprising performing a region identification process comprising:
means for selecting seed points in the pre-screened image that delineate a region of interest; means for selecting a sensitivity setting that determines the degree of precision that the region will be detected; means for requantizing the image to 16 graylevels using an equal probability quantization technique; means for determining the image block size based on the GSD parameter; means for computing the global level co-occurrence matrix (GLCM) to capture the spatial statistical dependency of pixels in each block; means for computing texture features; means for determining a threshold based on the sensitivity setting; and means for segmenting the image by region growing to produce a visually identifiable region in the line drawing.
- 9. The system of claim 7 further comprising means for saving the line drawing in tif file format.
- 10. The system of claim 7 further comprising means for saving the line drawing in jpg file format.
- 11. The system of claim 7 further comprising means for saving the line drawing in png file format.
- 12. The method of claim 1 wherein the resulting line drawing is saved in nitf file format.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is related to and claims the benefit of U.S. Provisional Patent Application Ser. No. 60/325,396, filed Sep. 27, 2001 entitled “Tactical Image Rendering Tool Image Processing Algorithm for Creation of Unclassified Line Drawings from Classified National Technical Means Imagery”.
STATEMENT OF GOVERNMENTAL INTEREST
[0002] This invention was made with Government support under a Navy contract no. 98-C-6663.
Provisional Applications (1)
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Number |
Date |
Country |
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60325396 |
Sep 2001 |
US |