By means of adjusting EMA absorption, not only the needs of image intensifiers can be reached for the transmissivity of fiber image inverter screens, but also the stray light escaping from the optical fiber can be absorbed to the full extent to improve the contrast.
通过调节EMA吸收量,既能满足像增强器对光纤倒像器荧光屏透过率的要求,又能保证最大程度地吸收光纤中逸出的杂散光,提高对比度。
Finally the enhanced fingerprint image can be got through inverter and ridge combination. ( 4) Fingerprint feature extraction algorithm is studied, and a hierarchical singularity extraction method is proposed.
最后经逆变换和脊线组合得到增强后的指纹图像。(4)研究了指纹特征提取算法,提出了一种分级式奇异点提取方法。
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