图像自动增强技术在第二代身份证相片处理中的应用

Automatic Image Enhancement Technology in Process of Second ID Card Photo

主要介绍了用于第二代居民身份证数字相片的图像自动增强技术的实现。首先,将采集到的数字相片从RGB空间转换到HSV空间,提取出亮度分量图像;然后采用直方图均衡的方法实现图像的亮度调整和对比度修正;最后,处理后的图像中人像的视觉效果很好,而且整个处理过程减少了人工操作。实验结果表明,该技术对图像有自动增强的有效性。

In this paper, the realization about the technology of automatic image enhancement is discussed in the second ID card digital photo. Firstly, after the collected digital photos are transformed from the RGB space to the HSV space, the luminance image is abstracted. Then, the method of histogram equalization is used to realize the adjustment of the luminance and the contrast. Last, by the automatic image processing, we process collected photos into the normal. And, in the whole processing, we make our best to reduce manual operations. Experiment results are given to demonstrate the effectiveness of the automatic enhancement.