The texture of an actual design processed article is reproduced in a pseudo way, and the time and cost required to make a trial product are reduced. A texture image data acquiring section (101) acquires texture image data including yarn information on the yarn constituting a fabric associated with each pixel. A processing design view data acquiring section (102) acquires processing design view data representing the pattern given to a fabric, and a processing condition acquiring section (103) acquires a processing condition of when design processing is performed at least including the position which is subjected to design processing out of the acquired processing design view data. A yarn information updating unit (105) updates yarn information on each pixel included in the texture image data corresponding to the position which is subjected to design processing of the processing design view data by using the acquired processing condition.
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