Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1983-05-13
1986-12-02
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 55, 350401, 350404, H04N 9077, H04N 907, G02B 530, G02B 2728
Patent
active
046268979
ABSTRACT:
A spatial frequency filter apparatus for suppressing spurious signals of the type generated in a color television camera incorporating a mosaic color encoding filter for multiplexing color signals includes two double refraction plates for filtering natural light introduced through a lens system in both the horizontal and vertical directions and an optical plate, such as a quarter wavelength plate or a rotatory polarization plate, interposed between the two double refraction plates. By causing natural light to transmit through the two double refraction plates and the optical plate before being introduced to the mosaic color encoding filter, the spurious signals are suppressed, whereby false color which may otherwise make an appearance at the contours of an image picked up by the color television camera can be significantly reduced.
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Nagahara Shusaku
Sato Masanori
Takahashi Kenji
Groody James J.
Hitachi , Ltd.
Svihla Randall S.
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