Advantages And Disadvantages Of Optical Camouflage Pdf

File Name: advantages and disadvantages of optical camouflage .zip
Size: 1001Kb
Published: 23.03.2021

Military camouflage

This is a continuation in part of application Ser. The need for this invention arises out of the present state of the art of military camouflage in the visible light spectrum. This invention is designed for the purpose of concealing both stationary and moving objects from view. The term "cloaking" as used in the title of this invention and elsewhere herein refers to concealing such objects.

Such techniques are rather primitive and do little to conceal a moving object as it is not possible with present fixed state camouflage techniques to cause an object to continually blend in with a changing background. In order to effectively camouflage a moving object, its appearance must be constantly controlled from the viewpoint of the observer to blend in with the changing background from the observer's perspective. Little has been done to utilize modern advancements in optoelectornics, computers, or microminiature components to camouflage an object.

The proposed system was conceived with the view in mind of effectively concealing a stationary or moving object such as a man, vehicle, or aircraft from view by utilization of this technology.

This invention will find practical application in military and law enforcement where field commanders find it useful to conceal such an object from view. This system is designed to interrupt energy in the visible light electromagnetic spectrum to effectively conceal an object from view by an observer. This is accomplished by insertion of a shield between an observer and the object being concealed and recreating a full color synthetic real-time image of the background on the shield for view by an observer, thus creating the illusion of transparency of the object.

The basic concept for the application consists of four basic building blocks: a sensor, a signal processor, and a shield which are interconnected through an analog, digital, of fiber optic data bus, and a supporting structure for all system elements, the object being concealed being interposed between the background and the shield.

The signal processor formats the image of the background as viewed by the sensor and presents a synthetic image of the background on the shield for view by an observer. The object is placed behind or within the shield which is of opaque construction, and having a nonspecular display surface thus concealing the object from view by the observer and yet creating an illusion of transparency of the complete Cloaking System and the enclosed object.

In its nonactivated state, the shield would have minimum light reflectivity. Although either an analog signal processor or digital signal processor may be used, the latter is described herein as one specific embodiment. The digital signal processor constantly compares the synthetic image in the shield with the reference image within the sensor and makes corrections to the synthetic image to correspond with the actual image being sensed. Data on the data bus blows in both directions.

Special software or embedded firmware will also be utilized in the signal processor to make changes in the image presented on the shield to correct for distance and angle of the observer with respect to the object being concealed; the source of intelligence information pertaining to an observer is beyond the scope of this invention but is mentioned here only for clarification. The digital signal processor 12 is the brain and controls all operations, digitally formats the image of the background 14 as viewed by the sensor 16, establishes a reference image matrix 18 within the sensor 16, and transmits the background image signal via the data bus 20 to a synthetic image matrix 22 within the shield 24, thus causing a synthetic image 26 to be displayed on the surface of the shield 24 as seen from the direction of observation The object 30 to be concealed is placed behind the shield 24 to prevent its being observed.

The digital signal processor 12 constantly compares the synthetic image matrix 22 with the reference image matrix 18 and makes corrections to the synthetic image matrix 22 which in turn corrects the synthetic image 26 to correspond with the actual background image 14 being sensed, thus minimizing distortion and maintaining realism of the synthetic image Data on the data bus 20 flows in both directions.

The primary purpose of the system is to present on the shield 24 a near identical image of the background behind said object 30 so as to create the illusion of transparency of both said object 30 and the Cloaking System 10; a secondary purpose of the system is to alter the synthetic image 26 to create an illusion of a background that does not exist; while such a deceptive method goes beyond the scope of simply creating an illusion of transparency of the object it would be very useful for special missions or difficult scenario conditions where it would be more effective to depict an artificial background than to display a representation of the actual background.

Any such alterations in the synthetic image 26 would be accomplished by software or embedded firmware and is considered part of the tactical strategy to be employed, thus emphasizing the flexibility of the invention and its potential interaction with the operating environment. The basic concept or cell unit depicted in the preceding FIG. Referring to FIG. The digital signal processor 12 organizes and presents a different synthetic image 26 on the appropriate sector of the shield 24a utilizing signals from appropriate sensors 16, together with tactical data concerning potential points of observation.

The appropriate size and number of sectors would be determined by the optimal design for a given operational mission. Although shown here as separate components for clarity, the present state-of-the-art would allow incorporation of the an embedded circuitry digital signal processor 12 and sensors 16 into the shield 24a to provide a cylindrical smart skin to wrap around the object.

The shield may also incorporate backplanes for mounting embedded sensors, processors and bus circuitry. Carrying the basic concept a step further, the shield 24b may be formed into a spherical shape as illustrated in FIG. A cutaway view is again presented showing object 30, sensors 16, digital signal processor 12, data bus 20, and a spherically shaped shield 24b. As with the cylindrical shape, the digital signal processor 12 organizes and presents a different synthetic image 26 on the appropriate sector of the shield 24b utilizing both tactical data and signals from appropriate sensors In this configuration there would be considerably more sectors, as compared with the cylindrical shape, and the programming would be more complex to provide a high degree of realism in the image.

Irregular shapes for the shield may also be employed utilizing conformal smart skins which would be thin digital signal processor circuits embedded within the shield display surface. However, in order to reduce distortion of the image, either a circular, cyclindrical, or spherical shape would allow uniform algorithms to be employed in the embedded processor programs in the digital signal processor 12 to correct for circular or spherical aberration.

Some distortion may appear as ripples or waves in the image, depending upon the shape of the shield, relative position and motion of the observer, and complexity of background images. However, in the algorithms could be developed, such as those required for irregular or conformal shields for military vehicles, to minimize such distortion. One alternate technology employs the simplest method of implementing the Cloaking System concept which would utilize a conventional analog signal processor, a specially designed liquid crystal display to present the background image on the shield, and a conventional video camera for the sensor.

Since this method utilizes conventional analog technology, this method is limited to flat plane or semicircular displays and would not lend itself to image correction as could be achieved by the digital options. However, this method would allow the construction of a prototype model within a year or two to demonstrate the basic cloaking concept. Another alternate technology employs a digital option; the main differences between this method and the first-described analog method consists of the conversion of all analog video signals to digital signals, the usage of a digital signal processor to direct all operations, and higher technology used in constructing the shield and the sensor.

Because of the high flexibility of the digital method, a great variety of shapes could be used for the shield and various compensation software or embedded firmware schemes could be employed to minimize distortion in the image; hence the digital method was selected and described in the preceeding section in considerable detail as one embodiment of the invention.

In still another method, photonic materials could be used for constructing the shield and sensor which would be capable of directly manipulating light signals and transmitting these signals on a higher speed fiber optic data bus.

These light signals could be then digitized and further manipulated by a digital signal processor to perform necessary system functions but without the encumbrance of the slower speed of a digital data bus.

The selection of either optoelectronic or photonic building blocks for the shield, sensor, and data bus would depend upon such factors as size and shape of the object to be shielded, speed of the object relative to the background, and environment. Usage of either optoelectronic or photonic materials in extremes such as that encountered in combat would require extensive testing and development. However, for more benign applications, a state-of-the-art system could be developed within three to five years utilizing currently available materials and components.

Any one of several available commercial or military digital process and bus architectures could be used depending upon the application and program requirements.

Sophisticated and advanced models using fiber optic technology and a high speed data bus would have advantages in terms of small size and conformal shape adaption of the shield. A simple Concept Demonstration Model could be constructed utilizing any of the above-described technologies and methods.

This model is shown in FIG. Sensors 16 view the wall 38 and the analog signals are subsequently displayed on the shield 24c facing the point of observation 28 behind line 36 which is fifty feet from the vehicle The vehicle 30 is moving to the left as shown by the arrow When the system is operating properly, the vehicle 30 would never be observed; only the wall 38 behind said vehicle 30 would be seen.

For simplicity and to establish a reference, the wall 38 would probably be initially monochromatic and color patterns added later to present more difficult scenarios and to measure system limitations. Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : The system effectively conceals either a still or moving object from view by the interposing of a shield between an observer and the object and recreating a full color synthetic image of the background on the shield for viewing by observer, thus creating the illusion of transparency of both the object and the Cloaking System.

This system consists of four major elements: a sensor; a signal processor; a shield; and a means of interconnecting, supporting, and safely enclosing the aforementioned elements along with the concealed object.

Field of the Invention The need for this invention arises out of the present state of the art of military camouflage in the visible light spectrum.

I claim: 1. A system for concealing an object from view by an observer through use of a background scene and comprising: means for sensing a background scene and for generating a video image signal therefrom;. A concealing system according to claim 1 wherein said background scene sensing means comprises means for converting background light images electrical analog image signals for processing by an analog signal processor.

A concealing system according to claim 1 wherein said background scene sensing means for converting background light images to electrical digital image signals for processing by a digital signal processor comprises; means for responding to digital commands from a digital signal processor;. A concealing system according to claim 1 wherein said sensing means for sensing a background scene produces fiberoptic image signals for said processed image.

A concealing system according to claim 1 wherein a processing subsystem, including said background sensing means, has the means for processing digital image signals for the purpose of presentation to a shield subsystem comprising: means for formatting digital image signals from said sensing means;. A shield for concealing an object from view of an observer comprising: means for providing a light absorbing opaque and nonspecular display surface which, in its nonactivated state, has minimum light reflectivity;.

A shield for concealing an object from view comprising: means for providing a light absorbing opaque and nonspecular display surface that, in its nonactivated state, has minimum light reflectivity;. A shield according to claim 7 wherein said shield is constructed from fiberoptic materials and has means for responding to commands from said digital signal processor. A shield according to claim 7 including an integral support structure for said shield, said signal processor, and an object to be concealed, said shield including backplanes for mounting embedded components, embedded sensors, and embedded data buses.

A shield according to claim 8 including an integral support structure for said sensor, said signal processor, and an object to be concealed, said shield including backplanes for mounting embedded components, embedded sensors, and embedded data buses. USA true USA en. Camouflage system for aircraft involving profection of images onto top and undercarriage of plane.

USB1 en. Screening device for e. Method for transferring images with incoherent randomly arranged fiber optical bundle and for displaying images with randomly arranged pixels. USB2 en. Cloaking devices constructed from reflection boundaries, half-mirrors and multiband dichroic color filters and vehicles comprising the same.

Method and means for enhancing camouflaged target detection utilizing light polarization techniques. Optic array for three-dimensional multi-perspective low observable signature control. USA1 en. CAC en. Method and device for processing an image in order to construct a target image from a plurality of contiguous source images. JPB2 en. EPB1 en. Method of representing a perspective image of a terrain and a system for implementing same.

CAA en. Method and apparatus for sampling images to simulate movement within a multidimensional space. EST3 en.

report(OC)

The new technology was designed to address the limitations set by earlier cloaking techniques. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. Light rays bouncing off the cloak pass through the transparent part of the mirror and fall on the user's eyes. Once it has passed, the frequency is put back in its original state. Optical camouflage technology won't make you invisible to multi-eyed Beholder monsters -- or even to stray cats and squirrels. A cloak of invisibility is a fictional theme. For now, spectral cloaking only works from one direction.

This is a continuation in part of application Ser. The need for this invention arises out of the present state of the art of military camouflage in the visible light spectrum. This invention is designed for the purpose of concealing both stationary and moving objects from view. The term "cloaking" as used in the title of this invention and elsewhere herein refers to concealing such objects. Such techniques are rather primitive and do little to conceal a moving object as it is not possible with present fixed state camouflage techniques to cause an object to continually blend in with a changing background. In order to effectively camouflage a moving object, its appearance must be constantly controlled from the viewpoint of the observer to blend in with the changing background from the observer's perspective.

Disadvantages Of Digital Halftoning

Admit it. You'd love to own an invisibility cloak. Utter an embarrassing faux pas at a party? Just throw on your magical garment and vanish from the snooty gaze of your fellow partygoers.

Military camouflage is the use of camouflage by an armed force to protect personnel and equipment from observation by enemy forces. In practice, this means applying colour and materials to military equipment of all kinds, including vehicles, ships, aircraft, gun positions and battledress , either to conceal it from observation crypsis , or to make it appear as something else mimicry. The French slang word camouflage came into common English usage during World War I when the concept of visual deception developed into an essential part of modern military tactics. In that war, long-range artillery and observation from the air combined to expand the field of fire, and camouflage was widely used to decrease the danger of being targeted or to enable surprise. As such, military camouflage is a form of military deception.

Animals from a wide range of taxonomic groups are capable of colour change, of which camouflage is one of the main functions. A considerable amount of past work on this subject has investigated species capable of extremely rapid colour change in seconds. However, relatively slow colour change over hours, days, weeks and months , as well as changes arising via developmental plasticity are probably more common than rapid changes, yet less studied.

B Milit Ary Camouflage 3.

report(OC)

Have you seen the movies predator, ghost in the shell or almost any sci-fi series? It is bending of light around an object, or displaying the image behind an object on the other side so as to give the illusion of there being nothing in the way. It's kind of being invisible so that a person standing in front of you, can see the scene behind you. This process of invisibility basically relates to an upcoming technology called "Optical Camouflage". Optical Camouflage delivers a similar experience to Harry Potter's invisibility cloak, but using it requires a slightly more complicated arrangement.

To browse Academia. Skip to main content. By using our site, you agree to our collection of information through the use of cookies. To learn more, view our Privacy Policy. Log In Sign Up. Download Free PDF.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Dec 3,

Speckle Noise Analysis

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Aug 6, Optical camouflage seminar report.

B Milit Ary Camouflage 3.

Thresholding has created to be a well-known technique used for binarization of document images. Thresholding is further divide into the global and local thresholding technique. Noise reduction: The noise, introduced by the optical scanning device or the writing instrument, causes disconnected line segments, bumps and gaps in lines, filled loops etc. The distortion including local variations, rounding of corners, dilation and erosion, is also a problem. Prior to the character recognition, it is necessary to eliminate these imperfections.

Он понимал, что времени у него. Агенты могут появиться в любую минуту. Собрав все силы, Хейл, сильнее обхватив Сьюзан за талию, начал пятясь подниматься по лестнице. Она пыталась цепляться каблуками за ступеньки, чтобы помешать ему, но все было бесполезно.

MODERN CAMOUFLAGE TECHNIQUES

 Справедливость восторжествовала, как в дешевой пьесе. - Успокойтесь, Джабба, - приказал директор, - и доложите ситуацию. Насколько опасен вирус.

Бринкерхофф окинул взглядом ее фигуру. - Отсюда выглядит просто отлично. - Да ну тебя, Чед, - засмеялась.  - Я гожусь тебе в матери.

1 Response
  1. Vilma B.

    is the main advantage of this cloak. There are many of optical camouflage would only provide invisibility in the visible portion of the spectrum. The research on.

Leave a Reply