SPECTRAL TEXTURE IMAGE GENERATION SYSTEM, SPECTRAL TEXTURE IMAGE GENERATION METHOD, AND PROGRAM

To provide a spectral texture image generation system which can easily generate a texture image on which a spectral reflectivity of a target object is reflected, with images captured by imaging apparatuses more inexpensive than a hyper-spectral camera.SOLUTION: The present invention is a system which generates spectral texture images of a three-dimensional geometric model in 4 or more bands of a spectral reflectivity of a target object, from multi-viewpoint images. The system comprises: a multi-viewpoint image classification unit which classifies multi-viewpoint images obtained by imaging the target object at different viewpoints by imaging apparatuses having different spectral sensitivities into spectral sensitivity groups of the same spectral sensitivities; a virtual multi-viewpoint image generation unit which defines multi-viewpoint images captured at a prescribed viewpoint as reference images and defines other multi-viewpoint images captured with spectral sensitivities different from those of the reference images as virtual multi-viewpoint images at the viewpoint of the reference images; a spectral image generation unit which estimates spectral reflectance spectra in 4 or more bands from the reference images and the virtual multi-viewpoint images to generate spectral images corresponding to the spectral reflectance spectra; and a spectral texture image generation unit which generates spectral texture images from the spectral images.SELECTED DRAWING: Figure 1 【課題】ハイパースペクトルカメラより安価な撮像装置の撮像画像で、対象物体の分光反射率を反映したテクスチャ画像を簡易に生成できる分光テクスチャ画像生成システムを提供する。【解決手段】本発明は、対象物体の分光反射率の４バンド以上の、三次元形状モデルの分光テクスチャ画像を多視点画像から生成するシステムであり、対象物体を異なる視点及び分光感度の撮像装置で撮像した多視点画像を、分光感度が同一の分光感度グループに分類する多視点画像分類部と、所定の視点の多視点画像を基準画像とし、基準画像と異なる分光感度の他の多視点画像を、基準画像の視点における仮想多視点画像とする仮想多視点画像生成部と、基準画像と仮想多視点画像から４バンド以上の分光反射スペクトルを推定し、分光反射スペクトルに対応する分光画像を生成する分光画像生成部と、分光画像から分光テクスチャ画像を生成する分光テクスチャ画像生成部とを備える。【選択図】図１