Ken'ichi Ohta

Visual Feature of Textile Design. Part 3. Evaluation by Using a Genetic Algorithm.

Designs that have been store in early days are often used as a reference when textile design is created . To effectively use these resources, a well-equipped design database must be constructed and a useful searching method must be studied. As to design searching method, searching methods that deal with human subjective information is requested. A technique for these searching methods one method that uses visual feature of textile design is proposed. In this paper, a correspondence was examined between the subjectivity like “pop out feeling” for textile design and spatial frequencies that are objective visual features for it . In this examination, genetic algorithm was introduced in order to increase the efficiency of processing time.It was presumed that the subjectivity like “pop out feeling” was related to lower components of spatial frequencies of textile design image. In this result, the textile design that impress man when man compare designs is similar to the textile design that is made up of lower spatial frequency components . As to design searches from subjectivity like “pop out feeling”, lower spatial frequency components that are objective visual feature are available for one of subjective searching item.

Development of Weaving Technology for Multi-Product, Small-Lot Production. Part 3: Development of Reed having space adjustable dents.

目的 たて糸をおさ羽の間隙に通したままで, たて糸密度の変更を実現するための密度可変おさを試作し検討する.また, このおさによって, たて糸密度が連続的に変わる織物の試作についても検討する.結果 おさ羽密度を7.1羽/25.4mm～8.3羽/25.4mmの範囲で可変にできる密度可変おさを開発した.このおさは, 製織過程でたて糸密度の変更を容易に行うことができた.また, 開発した密度可変おさを用いて製織を行った結果, おさ不良による織物のたて筋や密度むら等がない織物を織ることができた.これにより, 織物見本作成工程の効率化・省力化を達成することができる.

Applying Computer-color-matching Technique to Highly Precise Color Reproduction

With its distinctive, highly precise and smooth multi-color images, color printers of sublime dye transfer type are being used increasingly in such fields as computer-aided design systems and the proof printing as well as video printers.This paper reveals that the color printer is of an excellent subtractive mixture of color stimuli, and further demonstrates that a highly precise color reproduction may be realized by applying a color-matching technique based on subtractive mixture of color stimuli to the printer.