Issue No.07 - July (1972 vol.21)
L.F. Schaefer , Electronics and Bioengineering Laboratory, Stanford Research Inistitute
Spatial frequency encoding is described as it applies to both photographic and television systems. In each case, color separations amplitude modulate spatial frequency carriers. The photographic system separates the carriers in the two-dimensional Fourier transform plane using coherent optics; the television system employs a two-dimensional electrical filter to perform the same separation. These filters are synthesized so that the two-dimensional bandwidths of the television camera are used efficiently. Nonlinear processing techniques are also described to minimize crosstalk between channels.
Channel separation, color photography, color television, crosstalk, Fourier transform plane, spatial frequency encoding, two-dimensional filtering.
L.F. Schaefer, "Encoding and Decoding of Color Information Using Two-Dimensional Spatial Filtering", IEEE Transactions on Computers, vol.21, no. 7, pp. 642-647, July 1972, doi:10.1109/T-C.1972.223568