Difference between revisions of "CT x-ray scanner"
From Noah.org
Jump to navigationJump to searchLine 6: | Line 6: | ||
Here are some sample images that illustrate the process. The algorithm is quite simple. | Here are some sample images that illustrate the process. The algorithm is quite simple. | ||
− | In a real CAT Scan system the 1 dimensional slices would be taken from the horizontal row of a series of x-rays. In this demo I don't yet have the x-rays to work with so I synthesize the 1D bands from the target image that I want to regenerate. So given a target image I generate a series of 1D radial slices by rotating the target image and then averaging all values in the rows of the image. Then I rotate the slice back to the original angle. | + | In a real [http://en.wikipedia.org/wiki/Computed_tomography CAT Scan] system the 1 dimensional slices would be taken from the horizontal row of a series of x-rays. In this demo I don't yet have the x-rays to work with so I synthesize the 1D bands from the target image that I want to regenerate. So given a target image I generate a series of 1D radial slices by rotating the target image and then averaging all values in the rows of the image. Then I rotate the slice back to the original angle. |
Slices are synthesized from a 180 degree rotation of the target image. | Slices are synthesized from a 180 degree rotation of the target image. |
Revision as of 08:51, 13 December 2007
CAT Scanning
Here are some sample images that illustrate the process. The algorithm is quite simple.
In a real CAT Scan system the 1 dimensional slices would be taken from the horizontal row of a series of x-rays. In this demo I don't yet have the x-rays to work with so I synthesize the 1D bands from the target image that I want to regenerate. So given a target image I generate a series of 1D radial slices by rotating the target image and then averaging all values in the rows of the image. Then I rotate the slice back to the original angle.
Slices are synthesized from a 180 degree rotation of the target image.
The target and four 1 dimensional sections. The position of the sections corresponds to the angle of projection. | Cell 3 | Cell 4 |
Cell B | Cell C |