The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1998
Filed:
May. 22, 1997
Yoshihiro Miyamoto, Kawasaki, JP;
Masaji Dohi, Kawasaki, JP;
Fujitsu Ltd., Kawasaki, JP;
Abstract
A display signal of high contrast is generated by processing an image signal that is acquired from a camera such as an infra-red or X-ray camera. The method involves: dividing a screen into polygons, finding signal intensities of pixels in these polygons by interpolation from the original image signal intensities of pixels corresponding to the vertices of these polygons as a signal intensity LF of a low frequency component; finding the signal intensities HF of high frequency components of these pixels by performing calculation to subtract the signal LF of this low frequency component from the original image signal S at each pixel; finding, for the signal intensities HF of these high frequency components, from a histogram showing the rate of occurrence numbers of the respective signal intensities, a transformation function IHS including the integrated values of these rate of occurrence numbers up to respective signal intensities; transforming the signal intensities of the high frequency components HF into display signal intensities DHF in accordance with this transformation function IHS; and finding the display signal DP of these pixels by adding to the display signals DHF of these high frequency components obtained by this transformation a signal obtained by multiplying the signal of the low frequency component LF by a weighting coefficient .beta. of less than 1.