首页>
外国专利>
IMAGING DEVICE, EXTRACTION METHOD OF DIGITAL WATERMARK, DIGITAL WATERMARK AND OPTIMIZATION METHOD OF CODED APERTURE
IMAGING DEVICE, EXTRACTION METHOD OF DIGITAL WATERMARK, DIGITAL WATERMARK AND OPTIMIZATION METHOD OF CODED APERTURE
展开▼
机译：成像设备，数字水印的提取方法，数字水印和编码孔径的优化方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To extract a digital watermark accurately, even if defocused.SOLUTION: An imaging element 4 captures a two-dimensional image focused on a light-receiving surface, and acquires the image data of the two-dimensional image. An imaging optics 1(lenses 1A, 1B) focuses the two-dimensional image embedding a digital watermark on the light-receiving surface of the imaging element 4. An aperture stop 2 is disposed at the pupil position of the imaging optics 1, and has a coded aperture through which the light impinging on the imaging element 4 via the imaging optics 1 passes. An image processing section 5 executes deconvolution for the image data acquired by the imaging element 4 by using a blur function corresponding to the image data acquired by the imaging element 4, and obtains the image data of the two-dimensional image. The image processing section 5 extracts the digital watermark from the image data of the two-dimensional image thus obtained.SELECTED DRAWING: Figure 1
展开▼
