本論文是整合多色LED模組、各波長之水下光衰模型及光色補償方法建構水下LED色彩補償照明燈具。其中，多色LED模組分別由(B1)430 nm、(B2)420 nm、(B3)460 nm、(G1)590 nm、(G2)520 nm、(G3)490 nm、(R1)660 nm、(R2)680 nm、(R3)630 nm以及色溫6000K之正白光共10種色光所組成，並能調配出近似太陽光之照明效果。光色補償方法是針對不同波長之光強度在水下傳遞的衰減率，再經計算各波長所需補償之光強度並將訊號回傳至MCU控制器以調變多色LED模組，達到水下色彩還原之效果。由水下照明實驗顯示，當白光LED隨著目標物的距離越遠，在紅色波段(630~680nm)的衰減率大於藍色波段(420~460nm)，尤其紅色波段在距離目標物4m時，其紅色圖卡即轉變為黑色，藍綠圖卡雖轉為暗黑色系但仍可辨識，這表示紅色波段能量已消耗殆盡，而藍綠波段能量也有不等程度之損耗。由此得知，水中光色的補償必須大幅提升紅色波段之能量，再逐漸調整藍、綠波段之能量，以有效還原水中目標物損失之色彩，提供水下環境色彩辨識之能力，解決目前深海中因色衰現象導致物體顏色無法顯現，使得影像技術無法進行顏色校正問題。本文研製之LED色彩補償燈具僅需光源與目標物的水平距離即可補償光色損失之能量，再透過Practical Color Coordinate System(PCCS)色卡來檢視LED色彩補償照明燈具對於水下色彩的還原能力，以驗證LED色彩補償照明燈具相比白光LED、紅光LED及混合白光等光源更適合水下照明。

In this paper, we construct a color compensation module for underwater LED lighting, and propose a method based on the distance between the light source and the object to compensate for the loss of color of the object in the water. For module construction, we use 10 kinds of color LEDs to mix light, and adjust the mixed white light to simulate the illumination effect of sunlight, so that the color of water objects can be restored. Also, nine underwater light attenuation models of color light are also constructed. For the underwater light decay model, we use Beer-lambert law as the basis. Through the absorption coefficients of different wavelengths, we can obtain the underwater light decay curves of 9 kinds of color light by underwater light attenuation model. Finally, the underwater compensation curve of 9 kinds of color light is obtained through the underwater light attenuation curve of 9 kinds of color light, and the compensation results of 9 kinds of color light are realized by micro control unit. We use three kinds of light sources underwater to restore the color of the swatches, which are white LEDs, mixed white light and underwater LED color compensation lighting modules. The results show that the underwater LED color compensation lighting module is the most effective for the color reduction of swatches. This lighting can change the brightness of the distance to restore the color in the water.

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