Fuji Photo Film Company, Limited

Seiko Instruments Information Device Inc.

Shu Shirai

Mitsuru Sawano

Akihiro Sadaki

A density calibration chart comprising color patches on which densities from the shadow to the highlight are printed in decreasing order, characterized in that said printed color patches are arranged in a check pattern.

Density calibration chart

A method of color conversion includes preserving a 0% density for a particular color in the pre-conversion state to maintain a 0% density after conversion is provided via a translation table. Density gradation methods include a gradient value structure such that the highlight and shadow regions of the density are more finely represented in comparison to non-highlight and non-shadow regions. A further density correction method includes supplying an amount of energy to a non-image area when printing using a first color, wherein the amount of energy will not produce a dot in the non-image area upon application of a second color. A printer may employ one or more of the above methods in the form of a translation table or a density correction patch.

Color converting method, density-gradient correction method and color printer using the same

A method of recording an image in which a multicolor image is recorded by moving in a subscanning direction a head having recording elements arrayed in a main scanning direction to make variable the density or area ratio of each pixel in correspondence with an image density, and by combining the colors of yellow, magenta, cyan, and black, wherein each color is recorded by dots arranged at a fractional dot cycle in the sub canning direction, so as to prevent color moire due to misregistration.

Growing community of inventors

Shizuoka, Japan

Shu Shirai