方法采用水平梯度法和二次垂直导数等方法提取微弱信息，利用数字图象显示技术成图。
The horizontal gradient anomalies and two derivatives methods are adopted to extract faint information as well as other methods, and digital image display technique is used to show the results.
本项研究表明，光学流态显示和数字图象技术相结合，可以有效地揭示汽车的尾流结构，诊断阻力来源。
The results show that it is effective, by combining the laser flow visualization and the digital-image processing technology, to reveal the structure of car's wake and to determine the source of drag.
利用其电光效应，可实现对数字、图象的显示。
To make the use of photoelectric effect, we can realize indication of figure and picture.
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