Digital technique for pixel-based displacement adjustment and sensitivity calibration

Masafumi Yamakawa; Sachio Oki; Susumu Gohda; Takeharu Goji Etoh

doi:10.1117/12.294523

12 December 1997 Digital technique for pixel-based displacement adjustment and sensitivity calibration

Masafumi Yamakawa, Sachio Oki, Susumu Gohda, Takeharu Goji Etoh

Proceedings Volume 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement; (1997) https://doi.org/10.1117/12.294523
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A technique for 3-intensified-sensor color high speed video camera system to construct precise color image is presented. It consists of a computer program and ancillary instruments (1) to adjust displacement of images taken by two or three image sensors and (2) to calibrate relationship between incident light intensity and corresponding digital output signal simultaneously. The pixel-based displacement adjustment is made by corresponding a pixel of one image sensor with four pixels adjacent to that point on another sensor. The weighted average of outputs for the four pixels are then multiplied by a coefficient calculated from a pixel-based sensitivity calibration. An incident light is splitted into three signals by the cubic prism and these signals are taken by three image sensors. For these images, the pixel-based displacement adjustment and the pixel-based sensitivity calibration are performed by computer program. The gap between the centers of nine circles transformed to another image by computer program and those in another one is within one pixel. As a result, two pixel-based transformation tables for displacement adjustment and sensitivity calibration are made and three images are reconstructed with the use of these tables.

Citation Download Citation

Masafumi Yamakawa, Sachio Oki, Susumu Gohda, and Takeharu Goji Etoh "Digital technique for pixel-based displacement adjustment and sensitivity calibration", Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); https://doi.org/10.1117/12.294523

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