The autofocusing system can automatically search the focal plane by evaluating the image definition.
调焦系统可以通过对成像清晰度的评价来自动搜索到成像最清晰位置。
Compared with methods of wavelet transform, the method using in this paper can better reappear the ground information of cloud covering and have better image smoothness and image definition.
相比于小波变换等方法，该方法更好地再现了云层覆盖区的地物信息，具有更好的图像光滑度和清晰度。
The present invention discloses multistage irides image automatical focusing method combining frequency domain and time domain, method key being the image definition.
本发明公开了一种结合频域和时域的多阶段虹膜图像自动对焦方法。方法的核心在于图像的 清晰度评价。
An image definition criterion using wavelet transform based on the texture analysis was proposed in this paper through the statistical analysis to the image texture characteristic.
在对图像纹理特征进行统计分析的基础上，本文提出了一种基于纹理分析的图像小波变换清晰度评价方法。
Three performance metrics, image Definition, Inside and Outside Eccentricity, and Iris Visibility are introduced, which makes possible a real-time evaluation to the acquired images.
本文提出了“图像清晰度”、“内外偏心度”和“虹膜可见度”三个衡量图像质量的指标，实现了对虹膜图像进行实时质量评价的要求。
Three performance metrics, image Definition, Inside and Outside Eccentricity, and Iris Visibility are introduced, which makes possible a real-time evaluation to the acquired images.
本文提出了“图像清晰度”、“内外偏心度”和“虹膜可见度”三个衡量图像质量的指标，实现了对虹膜图像进行实时质量评价的要求。
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