Associate Professor, Ph.D. (Science)
E-mail: tanakago
TEL: +81-52-872-5191
FAX: +81-52-872-5191
Research Course: Mathematical and Material Science
URL http://www.nsc.nagoya-cu.ac.jp/~tanakago/  
Specialties Image Processing, Color Conversion for Color Barrier-Free
Keywords Digital Image, Color Vision, Color-to-Monochrome Conversion, Noise Removal, Contrast Enhancement
Current Research (1) Color Conversion for Color Barrier-Free:
There are some color combinations which are difficult to distinguish for some people, that is, dichromats. We develop a color conversion technique for dichromats. The method changes colors on computer monitor so that dichromats can distinguish colors in an input image.

(2) High-Quality Color-to-Monochrome Conversion Considering Differences between Colors:
In usual color-to-monochrome conversion, only lightness component is used for gray-level (monochrome image) composition. However, objects which have same lightness and different hue/chroma are converted to identical gray-level in this conversion, and these cannot be distinguished in an output monochrome image. Then we develop a new color-to-monochrome conversion which reflects color information in an input image to output gray-levels.

(3) Other Image Processing:
We also cope with other image processing. For example, noise removal and contrast enhancement.
Selected Papers Yellow-blue component modification of color image protanopia or deuteranopia, IEICE Transaction on Fundamentals of Electronics, Communications and Computer Sciences, vol.E94-A, no.2, pp.884-888 (2011).

Simple multiscale image enhancement for natural images, Optical Review, vol.17, no.3, pp.130-138 (2010).

Lightness modification of color image for protanopia and deuteranopia, Optical Review, vol.17, no.1, pp.14-23 (2010).

Derivation of the analytical solution of Color2Gray algorithm and its application to fast color removal based on color quantization, Optical Review, vol.16, no.6, pp.601-612 (2009).

Minimum spanning tree-based random-valued noise detection for switching median filter, Optics Letters, vol.33, no.17, pp.1993-1995 (2008).