Automatic setup system for television cameras

A system for automatic adjustment of a color television camera for correcting for registration errors between two color video signals with said camera viewing a test chart having a plurality of identical test marks equally distributed in rows and columns, comprising:

• first means including measuring means coupled to said camera and responsive to said two color video signals for providing simultaneously horizontal and vertical error signals associated with each of the identical marks representing in each mark location the horizontal and vertical positional errors between the two video signals,
• second means coupled to said first means and responsive to said horizontal and vertical error signals from each mark location for selectively and separately processing said error signals for horizontal centering, horizontal size, horizontal bow, horizontal tilt and horizontal linearity, vertical centering, vertical size, vertical bow, vertical tilt and vertical linearity, without remeasuring the errors for providing separate camera adjustment signals for horizontal centering, horizontal size, horizontal bow, horizontal tilt and horizontal linearity, vertical centering, vertical size, vertical bow, vertical tilt and vertical linearity, and
• third means coupled to said camera and responsive to the adjustment signals for adjusting said camera according to all of said adjustment signals before remeasuring for errors.

A system for automatic white shading adjustment of a television camera when viewing a test chart having a plurality of identical test marks distributed about different regions of the chart with one corresponding to the center of the television raster, comprising:

• first means for selecting the white level at the center of the raster,
• second means for detecting the white level setting at the center of the raster,
• third means coupled to said second means for comparing the white level detected from the center of the raster with the white level associated with the other test mark positions other than the center of the raster and for providing simultaneously detected difference signals from the different regions of the raster,
• means responsive to the detected difference signals for separately and selectively processing said difference signals for horizontal and vertical sawtooth correction and horizontal and vertical parabola correction to produce corresponding horizontal and vertical sawtooth correction signals and horizontal and vertical parabola correction signals to adjust the shading level of the entire raster to match the selected white level at the center of the raster, and
• means coupled to said camera and responsive to said correction signals for adjusting said camera according to said correction signals.

A system for automatic black level adjustment of a television camera with the camera lens capped, comprising:

• means coupled to said camera and responsive to the black level signals therefrom at different distributed regions of the television raster including the center region and regions on either horizontal and vertical sides of center for first signals representing the absolute amplitude level of the video signals from the different regions,
• second means for providing a reference black level,
• third means coupled to said first and second means for comparing said first signals with said reference black level for simultaneously providing a plurality of second signals each representing the difference or error signal between the detected absolute black level and the reference black level,
• fourth means coupled to said third means responsive to the plurlaity of second signals simultaneously provided for selectively and separately processing said signals for providing black level correction signals for horizontal and vertical sawtooth errors, horizontal and vertical parabola errors and overall gain error to correct the black level of the total raster to match the black level of the reference, and
• means coupled to said camera and responsive to said correction signals for adjusting the black level of said camera to match said reference.

A system for automatic adjustment of a color television camera when said camera is viewing a test chart having a plurality of identical test marks distributed in rows and columns, comprising:

• means coupled to said camera and responsive to the video signals therefrom for measuring and storing the initial detected position of the four corner marks when the active area of the pick-up device of said camera is aligned with the test chart,
• first means coupled to said camera and responsive to the video output therefrom for measuring and providing simultaneously horizontal and vertical position location signals with respect to the edges of the scanned areas of the raster for each mark location,
• second means responsive to said position location signals associated with the mark locations for providing a plurality of geometry correction signals,
• third means responsive to said geometry correction signals for adjusting said camera,
• fourth means coupled to said second means and said first means and responsive to the position of the four corner marks before and after geometry adjustment for providing horizontal and vertical size and centering correction signals to maintain alignment of the corners of the raster with the active area of the pick-up device.