Cross-talk explained

The image sensor measurements are subject to degradation caused by the photon and electron leakage. The color image data acquired via a spatial subsampling procedure implemented as a color filter array is especially vulnerable to the ambiguation between neighboring pixels that measure different portions of the visible spectrum. This so-called "cross-talk" phenomenon is expected to become more severe as the electronics industry's trend to shrink the device footprint continues because the pixel sensors are more densely packed together. We show that an analysis of the mechanism underlying the cross-talk problem is surprisingly straightforward. Our comprehensive analysis admits a simple and effective color correction scheme for a given choice of color filter array in a digital camera.

[1]  Rastislav Lukac,et al.  Color filter arrays: design and performance analysis , 2005, IEEE Transactions on Consumer Electronics.

[2]  R.W. Schafer,et al.  Demosaicking: color filter array interpolation , 2005, IEEE Signal Processing Magazine.

[3]  Ning Zhang,et al.  Lossless compression of color mosaic images , 2006, IEEE Transactions on Image Processing.

[4]  Eric Dubois,et al.  Filter Design for Adaptive Frequency-Domain Bayer Demosaicking , 2006, 2006 International Conference on Image Processing.

[5]  R. Schafer,et al.  Demosaicking: Color Filter Array Interpolation in Single-Chip Digital Cameras , 2003 .

[6]  황준.  Image sensor with improved light sensitivity and fabricating method of the same , 2001 .

[7]  Rastislav Lukac,et al.  Single-Sensor Camera Image Processing , 2006 .

[8]  Patrick J. Wolfe,et al.  Spatio-Spectral Color Filter Array Design for Enhanced Image Fidelity , 2007, 2007 IEEE International Conference on Image Processing.

[9]  Manu Parmar,et al.  A perceptually based design methodology for color filter arrays [image reconstruction] , 2004, 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[10]  C. Mouli,et al.  CMOS imager technology shrinks and image performance , 2004, 2004 IEEE Workshop on Microelectronics and Electron Devices.

[11]  O. Yadid-Pecht,et al.  A comprehensive CMOS APS crosstalk study: photoresponse model, technology, and design trends , 2004, IEEE Transactions on Electron Devices.

[12]  Thomas W. Parks,et al.  Adaptive homogeneity-directed demosaicing algorithm , 2003, Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429).

[13]  Thomas W. Parks,et al.  Joint demosaicing and denoising , 2006, IEEE Transactions on Image Processing.

[14]  R. Tsai,et al.  Crosstalk and microlens study in a color CMOS image sensor , 2003 .

[15]  Sabine Süsstrunk,et al.  Linear demosaicing inspired by the human visual system , 2005, IEEE Transactions on Image Processing.