Kabushiki Kaisha Toyota Chuo Kenkyusho

Kazunori Higuchi

Shin Yamamoto

Osamu Ozeki

Tomoaki Nakano

An image processing device compensates an original image for helping deteriorated human vision characteristics and displays the compensated image. Declines in a spectral sensitivity characteristic is compensated for by multiplying a brightness value of the original image by an inverse characteristic 1/A of a relative spectral sensitivity characteristic A in reference to a predetermined spectral sensitivity characteristic of a standard person. The first compensated image q(x,y) for defocus, or declines in accommodation characteristic, is obtained by a convolution integral of an original input image f(x,y) and a function j(x,y). The second compensated image m(x,y) for declines in sensitivity to cut-off frequency is obtained by a convolution integral of an original input image q(x,y) and the function p(x,y). The j and the p vary utilizing a radius of a blurred image and the cut-off frequency as a parameter, respectively. The image processing device enables an observer to recognize the original image as it is or as observed by the standard person, regardless of age or individual variations.

Image compensating device based on age-related characteristics

XYZ coordinates measuring system

A system for measuring three-dimensional shapes and dimensions includes: an imaging unit which faces an object with shape changes on the surface and images by means of a TV camera the slit line formed on the object surface by projecting slit light from a slit light source at a fixed angle; and a surface feature extraction member for extracting features representing the shape changes of the object surface, based on the changes of the XYZ coordinate values of the object surface detected by triangulation based on the centroid position of the intensity distribution of the slit line image corresponding to the scanning lines from the TV camera. Based on features thus extracted, the surface shape of the object can be measured rapidly with high precision.

System for measuring shapes and dimensions of gaps and flushnesses on

An XYZ coordinates measuring system has a slit light source for projecting a slit light beam onto the surface of a work to be measured with a predetermined angle. Furthermore a television camera takes a light line formed on the surface of the work by the slit light beam to generate an output video signal. A coordinate measuring circuit has a look-up table for previously storing the interrelationship between the horizontal and vertical imaging positions of the light line and the XYZ coordinates on the surface of the actual work. The coordinate measuring circuit is adapted to process the video signal to detect the horizontal and vertical imaging positions Ks and Ls of the light line and to output the XYZ coordinates on the surface of the work from the look-up table, depending on the detected horizontal and vertical imaging positions Ks and Ls, the XYZ coordinates on the surface of the work can thus be real-time measured along the light line.

Growing community of inventors

Aichi, Japan

Kazunori Higuchi