Image analysis – Histogram processing – For setting a threshold
Patent
1991-12-23
1992-12-22
Couso, Jose
Image analysis
Histogram processing
For setting a threshold
382 31, 359245, 359244, 359242, 359254, G06K 920
Patent
active
051739542
ABSTRACT:
A spatial light modulation device includes a spatial light modulation tube and converts a one-dimensional photoelectron image into a two-dimensional electron image, rotating the two-dimensional electron image, subjecting the rotated two-dimensional electron image and a previously stored electron image to addition or subtraction, and stores the electron image thus processed. An image reconstructing apparatus includes: projection means for detecting as projection data a projection of internal information of an object; the spatial light modulation device which produces and stores a corrected reconstructed image on the basis of a one-dimensional correction data image and a previously stored reconstructed image; optical reading means for reading out the reconstructed image form the spatial light modulation device; summing means for integrating parts of the readout reconstructed image to produce sum data; and comparison and correction means for subjecting the projection data and the sum data to comparison to form the one-dimensional correction data image.
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Hara, T. et al., "Microchannel Spatial Light Modulator Having the Functions of Image Zooming, Shifting, and Rotating", Applied Optics, vol. 25, No. 14, pp. 2306-2310, Jul. 15, 1986.
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Macovski, A., "Principles of Reconstruction Algorithms", General Theory of Computed Tomography, ch. 110, pp. 3877-3903.
Kato Makoto
Takiguchi Yoshihiro
Couso Jose
Hamamatsu Photonics Kabushiki Kaisha
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