To transfer the color data from a device (video camera) dependent color space into a device? independent color space, a multilayer feedforward network with the error backpropagation (BP) learning rule, was regarded ...To transfer the color data from a device (video camera) dependent color space into a device? independent color space, a multilayer feedforward network with the error backpropagation (BP) learning rule, was regarded as a nonlinear transformer realizing the mapping from the RGB color space to CIELAB color space. A variety of mapping accuracy were obtained with different network structures. BP neural networks can provide a satisfactory mapping accuracy in the field of color space transformation for video cameras.展开更多
为了解决单相机平台受高分辨率与大视场角之间矛盾制约的问题,本文提出了一种大视场、高分辨率、无色差的复眼相机阵列系统。结合人眼视觉成像理论,建立非均匀采样的仿生视觉模型,降低系统输入端的数据冗余;设计了一种多图像平滑加权融...为了解决单相机平台受高分辨率与大视场角之间矛盾制约的问题,本文提出了一种大视场、高分辨率、无色差的复眼相机阵列系统。结合人眼视觉成像理论,建立非均匀采样的仿生视觉模型,降低系统输入端的数据冗余;设计了一种多图像平滑加权融合算法,实现大视场图像无缝拼接;提出了一种基于多级迭代直方图匹配的色彩校正算法,提高了不同子相机间的色彩一致性;利用相邻子相机间重叠区域,对感兴趣区域(Region of Interest,ROI)进行多图像超分辨率重建。最终搭建了曲面相机阵列系统,实现了无色差大视场高分辨率图像的获取。实验结果表明,该系统能够达到单个子相机9倍的视场角与分辨率,并实现了ROI的4倍超分辨率重建。相比于典型的色彩校正算法HM,本文所提方法的PSNR和HSM指标分别提升了4.1%和15.9%,满足了多相机系统在复杂场景下的大视场、高分辨率、无色差的需求。展开更多
文摘To transfer the color data from a device (video camera) dependent color space into a device? independent color space, a multilayer feedforward network with the error backpropagation (BP) learning rule, was regarded as a nonlinear transformer realizing the mapping from the RGB color space to CIELAB color space. A variety of mapping accuracy were obtained with different network structures. BP neural networks can provide a satisfactory mapping accuracy in the field of color space transformation for video cameras.
文摘为了解决单相机平台受高分辨率与大视场角之间矛盾制约的问题,本文提出了一种大视场、高分辨率、无色差的复眼相机阵列系统。结合人眼视觉成像理论,建立非均匀采样的仿生视觉模型,降低系统输入端的数据冗余;设计了一种多图像平滑加权融合算法,实现大视场图像无缝拼接;提出了一种基于多级迭代直方图匹配的色彩校正算法,提高了不同子相机间的色彩一致性;利用相邻子相机间重叠区域,对感兴趣区域(Region of Interest,ROI)进行多图像超分辨率重建。最终搭建了曲面相机阵列系统,实现了无色差大视场高分辨率图像的获取。实验结果表明,该系统能够达到单个子相机9倍的视场角与分辨率,并实现了ROI的4倍超分辨率重建。相比于典型的色彩校正算法HM,本文所提方法的PSNR和HSM指标分别提升了4.1%和15.9%,满足了多相机系统在复杂场景下的大视场、高分辨率、无色差的需求。
