Arrangement for providing a flickerless ordered dither image for a video display
AssigneeBell Telephone Laboratories, Incorporated
InventorsHelmuth O. Sautter, Donald B. Swicker
Life of this patent
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Abstract
A flickerless video display for a gray scale image is obtained using binary picture elements in an interlaced field format. The flicker is eliminated by causing each display point on a line of the interlaced field to be vertically paired with and have an intensity equal to a display point which is located on an adjacent line. Incorporating this arrangement into a display system involves a modification only to the transmitter.
Claims10
A system for processing a dithered image for display in a plurality of interlaced scanned lines, the system comprising:
- means for producing an image signal having multiple picture elements;
- means for generating a signal representing a matrix of ordered dither display points from the image signal;
- and
- means for arranging an ordered plurality of rows in the matrix of ordered dither display points, each one of the display points having an intensity determined in response to the signal generating means and being juxtaposed with a display point having the same intensity on an adjacent row in the ordered plurality.
A method for processing a dithered image for displaying in a plurality of interlaced scanned lines, the method comprising the steps of:
- producing an image signal representing multiple picture elements;
- generating a signal representing a matrix of ordered dither display points from the image signal;
- and
- arranging an ordered plurality of rows in the matrix of ordered dither display points, each one of the display points having an intensity determined by the generating step, and each display point being juxtaposed with a display point having the same intensity on an adjacent row in the ordered plurality.
A system for processing a dithered image for display in a plurality of interlaced scanned lines, the system comprising:
- an input signal representing multiple picture elements;
- means for generating a signal representing a matrix of dithered image thresholds;
- means for comparing the dithered image thresholds with the image signal;
- and
- means responsive to the comparison means for generating a signal representing an ordered plurality of rows of display points, each one of the display points having an intensity determined in response to the instantaneous intensity of the input signal and the intensity of the dithered image threshold signal, and each display point being juxtaposed with a display point having the same intensity on an adjacent row in the ordered plurality.
A method for processing a dithered image for displaying in a plurality of interlaced scanned lines, the method comprising the steps of:
- producing an input signal representing multiple picture elements;
- generating a signal representing a matrix of dithered image thresholds;
- comparing the matrix image threshold signal with the input signal;
- and
- generating a signal representing an ordered plurality of rows of display points, each one of the display points having an intensity determined by the instantaneous intensity of the input signal and the intensity of the dithered image threshold signal, and each display point being juxtaposed with a display point having the same intensity on an adjacent row in the ordered plurality.
Dependencies are inferred from the claim text.