| 摘要 |
In a substrate inspecting apparatus comprising a projecting section (4) in which light sources (8), (9) and (10) for emitting colored lights of R, G and B are provided in directions having different elevation angles, one or two color components which is/are greater than the mean value of the intensities of color components of red, green and blue is/are extracted for an inspecting region including a soldered portion. Inclined surfaces adapted to the light sources (8), (9) and (10) are converted into monochromatic shaded images of red, green and blue by the extraction processing, respectively. Furthermore, a boundary position between the inclined surfaces adapted to the light sources (8) and (9) are converted into shaded images having a mixed color of red and green and the boundary position between the inclined surfaces adapted to the light sources (9) and (10) is converted into a shaded image having a mixed color of green and blue. |
