Ghost Imaging


Ghost imaging, also known as Gigabit Etherboot Server Imaging (GESI), is a software-driven process used to create a copy of a computer’s entire operating system, applications, and associated files. This copy, called an “image,” is saved as a backup or for cloning onto multiple systems. Ghost imaging streamlines large-scale deployments and system restores, as it allows for rapid duplication of the desired configurations and settings.


The phonetics of the keyword “Ghost Imaging” would be:/ɡəʊst (-) ˈɪm.ɪ.dʒɪŋ/- Ghost: /ɡəʊst/- Imaging: /ˈɪm.ɪ.dʒɪŋ/

Key Takeaways

  1. Ghost Imaging is a technique that uses correlated photon pairs to create an image of an object without directly exposing it to light.
  2. This method can achieve high-resolution images even in low-light, noisy, or turbid environments, making it suitable for applications like biomedical imaging, surveillance, and remote sensing.
  3. Ghost Imaging can potentially be more efficient and less damaging to sensitive samples than traditional imaging techniques, as it requires fewer photons to create a clear image.


Ghost Imaging is an important technology term because it refers to the process of creating a complete backup or replica of a computer’s hard drive, including its operating system, applications, and data.

This process is crucial in ensuring businesses and individuals can quickly and efficiently recover from potential data loss or system failures.

By utilizing ghost imaging solutions, users can save time and resources when restoring or migrating systems, as they can quickly roll back to a functioning state in case of a major issue or implement the same software configurations across multiple devices.

Additionally, ghost imaging contributes to enhanced cybersecurity measures by allowing users to revert their systems to a secure, uninfected state following a malware attack or security breach.


Ghost imaging is a novel imaging technique extensively employed in various domains such as quantum physics, optics, and remote sensing for acquiring highly-detailed images of objects or scenes using extremely few photons. The primary purpose of ghost imaging is to enable clear image reconstruction even under low light or unfavorable conditions. This is achieved by taking advantage of the unique properties of light waves and quantum mechanics, as well as utilizing the inherent correlations between pairs of light beams.

The ability to form an image with limited illumination enables a range of applications, especially in scenarios where other conventional imaging methods fail to deliver optimal results. In practice, ghost imaging is often used for enhancing the visibility and accuracy of vital information, with applications spreading across diverse areas such as surveillance systems, medical imaging, and material analysis. For instance, in military operations, ghost imaging can significantly aid in the detection and identification of potential targets at long distances, even in almost complete darkness.

Additionally, in the field of remote sensing, ghost imaging plays a crucial role in providing accurate meteorological information by monitoring atmospheric conditions with improved precision. Similarly, medical imaging techniques like ghost computed tomography have demonstrated their potential to offer high-resolution imaging with minimized exposure to harmful radiation, making it a valuable diagnostic tool. Overall, ghost imaging serves as a versatile and promising technology that continues to find new applications and opportunities across various industries and research disciplines.

Examples of Ghost Imaging

Ghost Imaging is a fascinating technique in the field of optics and imaging, where an object is imaged by measuring the correlations between two light beams – one that interacts with the object and another that does not. Here are three real-world examples of Ghost Imaging applications:

Remote sensing and surveillance:Ghost Imaging allows for the detection and imaging of objects at a distance using a small number of photons. This makes it particularly useful in remote sensing and surveillance applications where stealth is crucial. For instance, in military or reconnaissance scenarios, this technology can detect and track hidden targets with minimal risk of detection from the target. Additionally, it can be used for imaging through an opaque medium, such as imaging an object through fog or haze.

Medical Imaging:Ghost Imaging has potential applications in the field of medical imaging, particularly in instances where the amount of radiation exposure needs to be minimized. The technology can offer enhanced imaging capabilities with lower doses of radiation, making it appealing for medical purposes, such as X-ray imaging or nuclear medicine. By reducing the radiation exposure, this technology could lead to safer imaging procedures in the long term.

Imaging in low-light conditions:Ghost Imaging can function in low-light environments, making it efficient for imaging faint astronomical objects. Research is ongoing into applying this technology in astronomical imaging to capture high-quality images of distant stars, galaxies, and other celestial objects. Additionally, it could benefit industries like telecommunications, where finding the optimal signal in low-light conditions can be a challenge.

Ghost Imaging FAQ

What is Ghost Imaging?

Ghost Imaging is a technique used for capturing the image of an object without recording its direct spatial information. Instead, it’s based on correlations between random reference patterns and the object’s information that’s transmitted. This technology is beneficial for imaging highly-sensitive or fast-fading targets and can be applied in various fields such as surveillance, medical stuff, and remote sensing.

How does Ghost Imaging work?

Ghost Imaging works by splitting a light source (usually a laser) into two beams – one to illuminate the object and the other to act as a reference. The object’s image is formed by detecting correlations between the scattered light from the object and the reference beam. These measurements can be done either with a single-pixel detector or a high-spatial-resolution CCD camera, depending on the specific application and requirements.

What is Quantum Ghost Imaging?

Quantum Ghost Imaging is a variation of Ghost Imaging that utilizes the principles of quantum mechanics. In this method, entangled photon pairs are produced using a process called spontaneous parametric down-conversion (SPDC). One photon illuminates the object and the other acts as a reference. The image is formed by detecting quantum correlations between the two photons without actually detecting the photons scattered by the object. This form of Ghost Imaging provides better image quality and higher sensitivity than classical Ghost Imaging methods.

What are the advantages of Ghost Imaging?

Ghost Imaging offers several advantages over traditional imaging techniques. These include:
1. High sensitivity to weak signals, making it suitable for imaging targets with extremely low reflectivity or fast fading properties.
2. Lower radiation exposure in applications like medical imaging as it requires fewer photons for image formation.
3. Improved imaging resolution, especially in Quantum Ghost Imaging where quantum correlations increase the precision.
4. The ability to image through turbulent or scattering media, which makes it ideal for remote sensing and surveillance applications.
5. Simplified imaging setup, as it uses single-pixel detectors instead of costly high-resolution cameras.

What are the potential applications of Ghost Imaging?

Ghost Imaging has potential applications across several fields, including:
1. Medical imaging: It can be used for non-invasive diagnostics, enhancing the imaging of tissues with reduced exposure to harmful radiation.
2. Remote sensing: It can be applied in remote sensing for imaging through turbulent media and scouting urban environments.
3. Surveillance: Ghost Imaging offers improved detection of faint objects or hidden obstacles in various scenarios.
4. Astrophysics: The technique can be employed in imaging faint astronomical objects or studying the properties of turbulent atmospheres of celestial bodies.
5. Security and authentication: Quantum Ghost Imaging can be used to detect forgeries or hidden objects across various security applications.

Related Technology Terms

  • Quantum Entanglement
  • Spooky Action at a Distance
  • Single-Pixel Camera
  • Correlated Photon Pairs
  • Computational Ghost Imaging

Sources for More Information


About The Authors

The DevX Technology Glossary is reviewed by technology experts and writers from our community. Terms and definitions continue to go under updates to stay relevant and up-to-date. These experts help us maintain the almost 10,000+ technology terms on DevX. Our reviewers have a strong technical background in software development, engineering, and startup businesses. They are experts with real-world experience working in the tech industry and academia.

See our full expert review panel.

These experts include:


About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

More Technology Terms

Technology Glossary

Table of Contents