Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

TV Signal

Real-time-dynamic-range-compression-for-image-enhancement

Optical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus therefor

In order to enable recording in an optical card apparatus, a laser beam flux needs to be focused as ...

Packet switching testing method and apparatus

It is a primary object of the present invention to provide a packet switching testing method and a ...

Process for producing an organic photosensitive material preventing blushing

The assignment of the present invention therefore is to provide a process for producing an organic ...

Phenothiazine leucodyes for electrochromic recording

We claim: 1. A substrate for electrochromic recording comprising bromide ions and characterized by ...

Electrochromic marking systems

INCLUSIVE OF THE PREFERRED EMBODIMENTS More specifically, this invention in its composition of ...

Color thermal diffusion-transfer with leuco dye reducing agent

The present invention provides a photothermographic composite structure comprising (1) a dyeable ...

Stabilized leuco phenazine dyes and their use in an imaging system

The thermographic systems of this invention comprise a leuco dye which is capable of being ...

Photothermographic element comprising particles each containing silver halide, a silver compound and reducing agent

OF THE INVENTION A dispersion of particles containing color photothermographic chemistry therein ...

Oxazine laser dyes

Oxazine salts, particularly, but not exclusively, the fluoborate, are provided as laser dyes and ...

Method for obtaining a printing plate according to the silver salt diffusion transfer process

According to the present invention it has been found that the problems of printing quality of a ...

Real time dynamic range compression for image enhancement

Details

Inventors: Zwirn, Robert; Farwell, William D.;
Assignee: Hughes Aircraft Company (El Segundo, CA)
Primary Examiner: Chin; Tommy P.
Assistant Examiner:
Attorney, Agent or Firm: Meltzer; Mark J., Bethurum; W. J., Karambelas; A. W.

Circuitry is disclosed which generates signals which may be applied to subsequent processing circuitry, such as a display device. Applied signals having a first predetermined number of intensity levels are transformed by the circuitry into signals having a smaller predetermined number of intensity levels suitable for application to the display device. A histogram representing the number of occurrences of each particular intensity level in the first predetermined set of intensity levels is generated. This histogram is analyzed, and a plurality of peak intensity levels are selected for application to the display device. Mapping signals are generated which are determinative of which subsets of the remaining intensity levels are mapped into particular ones of the selected peak intensity levels. The mapping signals are then utilized to transform applied signals received during a subsequent time period into signals having the selected peak intensity levels. Output signals are provided having the selected peak intensity levels to the display device. The circuitry preserves the gross statistics of the image scene by selecting the dominently populated intensity levels for display.

DETAILED DESCRIPTION The present invention provides for a real-time image enhancement system which redistributes the populations of the output levels of the image sensor prior to their application to subsequent processing devices, such as a video display device.
This redistribution is done in the manner which preserves the gross statistics of the original image scene.
The system selects dominantly populated output levels for display by the display device.
The present invention provides for a system for use with a display device which processes applied signals having a first set of intensity values.
The system may generally process applied signals comprising sequential fields of video signals, or other signals having a video-like format.
The system provides output signals having a second set of intensity values to the display device, or the like.
The first set of intensity values must be greater than the second set.
The system comprises histogram generation circuitry which generates a histogram indicative of the number of occurrences of signals at each intensity value in the first set received during a first time period.
Processing circuitry, which may be a computer device, is coupled to the histogram generation circuitry.
The processing circuitry selects the second set of intensity values from the histogram which correspond to those intensity values that occur more often than other intensity values.
The processing circuitry also generates mapping signals which are determinative of the respective intensity values from the second set of intensity values to which subsets of the remaining intensity values are assigned.
The mapping signals are determinative of which subsets of the first set of intensity values are mapped into selected ones of the second set of intensity values.
Mapping circuitry is coupled to both the processing circuitry and display device for providing output signals to the display device.
The output signals are provided to the display device during a second time period in response to applied signals received during the second time period

Related patents

	Producing pseudocolor magnetic resonance images I claim: 1. A method for producing a magnetic resonance image for simultaneously visualizing independent first and second parameters in a field of data comprising the ...
	Rotary recording medium having a guide track and recording and reproducing apparatus therefor Accordingly, it is a general object of the present invention to provide a novel and useful disc having a guide track and a recording and reproducing apparatus for ...
	Transfer sheets for thermal transfer recording OF THE INVENTION Then, the invention is described below in detail. First, the dyes for use in this invention shown by formula (I) described above are explained. In ...
	Thermal image transfer recording system OF THE PREFERRED EMBODIMENTS The image receiving medium for use in the present invention comprises a substrate and a dye receiving layer formed thereon, the dye ...
	Optical recording and reproducing apparatus having erasing function with controllable erasing beam In view of the aforementioned points, the object of the present invention is to provide a data recording and reproducing apparatus which is free of a recording trace or ...
	Tide calender disk and method The present invention is directed to an improved tide disk apparatus for use in determining the time of condition of tide at a selected time, at one or more selected ...
	Record player with turntable brake and balance wheels Accordingly, objects of this invention are to overcome the problems and disadvantages of prior art record players and to obtain improved record player structures with ...
	Plant control composition and methods of use OF THE INVENTION It now has been found that synergism in the defoliation of plants is exhibited by a combination of a thiozol-urea abscission agent and an adduct ...
	Methine dye synthesis I claim: 1. Process for the preparation of a disperse methine dye containing at least one dicyanomethylidene group comprising the steps of (A) preparing an anhydrous ...
	Yellow dye mixture for thermal color proofing What is claimed is: 1. A yellow dye-donor element for thermal dye transfer comprising a support having thereon a dye layer comprising a mixture of yellow dyes dispersed ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved