基于散斑照明和全息的穿透散射介质成像

Imaging Through Turbid Media Based on Speckled Illumination and Holography

目前,穿透散射介质的成像技术因其在生物医学成像和安防领域的巨大应用价值而受到广泛关注。虽然存在不同穿透散射介质的成像技术,但实现实时成像依然存在问题。提出了一种结合散斑照明、傅里叶全息成像和浴帘效应的快速穿透散射介质成像方法。该方法对单幅原始散斑图像进行一次傅里叶变换运算就可以恢复隐藏物体的信息,简单的图像处理过程使得系统具备实时成像的能力。从理论和实验上,对该方法的非侵入、实时成像能力进行了验证,成功地对隐藏在散射体之间的物体进行了探测,并实现了实时成像。另外,也给出了物体尺寸的计算公式。该方法有利于推动对抗散射成像技术的实用化。

Imaging technology through scattering materials has been attracting a wide research interest because of its application values in medical imaging and security.Although different technologies have been proposed to conquer the scattering disturbance,it is still a challenge to achieve real-time imaging.A method for fast imaging through scattering medium is presented based on the speckle illumination,Fourier holography and curtain effect.The information of the hidden object can be recovered by a Fourier transform to a single original speckle image.The simple image processing makes the system has the capability of real-time imaging.The non-invasive real-time imaging ability of the proposed method is verified both theoretically and experimentally.The object hidden between scatters is reconstructed successfully and real-time imaging is realized.In addition,a formula for calculating the size of the object is provided.The proposed method can promote the practical application of imaging through turbid media.