| 摘要 |
An optical data insertion device 20 is operable to insert additional optical data into an existing primary image received from a primary optical system 11 so as to provide a combined image. A primary aperture 21 is operable to receive incident light from the primary optical system 11 comprising said primary image. A secondary aperture 22 through which light comprising a combined image passes; and a partially transparent screen 23 are provided between the primary aperture 21 and the secondary aperture 22. The screen 23 is operable in response to control signals to selectively emit light corresponding to said additional optical data or to selectively block the passage of light corresponding to said additional optical data. The additional data comprises a difference image generated by subtracting the output values of pixels in each captured image from the output values of the corresponding pixels in the subsequent captured image. |
