Texture or the wrinkle of the skin can be discriminated in high accuracy, at the same time quickly, it designates that the technology which the wrinkle is discriminated is offered texture and/or as topic. In addition, it designates that the method of selecting the skin external use medicine particular discrimination on the basis of the result of doing is offered as topic. Cruciform binary conversion processing and/or shortly it does the image processing which includes rectilinear matching processing vis-a-vis the skin picture which is obtained, it substitutes to the estimate system which prepares the physical amount of the skin which is obtained with process and the aforementioned process which obtain the physical amount of the skin, beforehand, the appraisal value which is obtained texture of the skin and/or with the process which appraisal it is worthy of and discriminates and of the wrinkle it includes, topic is solved texture of the skin and/or with the discrimination method of the wrinkle.肌のキメ或いはシワを高精度に、且つ迅速に鑑別できる、キメ及び/又はシワの鑑別する技術を提供することを課題とする。また、当該鑑別を行った結果に基づいて皮膚外用剤を選択する方法を提供することを課題とする。得られた肌画像に対して十字二値化処理及び/又は短直線マッチング処理を含む画像処理を行い、肌の物理量を得る工程と、前記工程で得られた肌の物理量を、予め用意した予測式に代入し、得られた評価値を皮膚のキメ及び/又はシワの評価値と鑑別する工程とを含む、肌のキメ及び/又はシワの鑑別法により、課題を解決する。
