| 摘要 |
PURPOSE:To realize proper shading in spite of a distance from a viewpoint to a projection object (CT picture) so as to prevent display effect as a three- dimensional picture from being deteriorated even if a depth picture generated by using a center projection method is converted into a surface picture. CONSTITUTION:In a shading method at the time of converting the depth picture generated by using the center projection method into the surface picture, a frequency average averaged by the absolute value of amplitude at the time of developing by orthogonal conversion for respective depth picture lines is obtained. The degree of the picture' shading at the time of converting the picture into the surface picture by using the frequency average is changed (1-10). |
