Abstract: The imaging process and properties of underwater low-light-level image are discussed and the main reason that electrical and optical noises of the image enhancement device worsen image quality is proposed. A new disposing scheme aimed at the underwater low-light-level TV image is developed, on the basis of the Frame Integral method to eliminate the low-pass property of the image fluorescence screen and the optical noise of the enhancement device induced by the light source voltage ripple. By using the Arithmetics-Multi-Model-Data-Fusion-Method proposed by the author, the scenery’s edge becomes much clearer and the contrast degree of the image is improved. Experimental results show that the observation effect of the processed image is satisfactory.

Key words: underwater low-light-level TV, image enhancement, frame integral, Arithmetics-Multi-Model-Data-Fusion-Method