What is the difference between recognition and identification?

Summary:

The article discusses the difference between recognition and identification in the context of CCTV. It explains that recognition involves determining with a high degree of certainty whether an individual shown is the same as someone that has been seen before, while identification enables the identity of an individual beyond a reasonable doubt. It also explores Johnson’s criteria for detection, the difference between thermal image and optical image, camera identification, how camera recognition works, and the two types of thermal imaging scans. Additionally, it explains thermal imaging in simple words, how to use identify on an iPhone camera, what photo recognition is, the three different types of thermal imaging technology, and the different types of scans.

15 Questions:

1. What is the difference between recognition and identification in CCTV?
Recognition involves determining with a high degree of certainty whether an individual shown is the same as someone that has been seen before, while identification enables the identity of an individual beyond a reasonable doubt.

2. What is Johnson’s criteria for detection?
Johnson defined “detection” as the ability to subtend 1 TV line pair (+/- 0.25 line pairs) across the critical dimension of the subject, which translates to 2 pixels when using an LCD monitor.

3. What is the difference between thermal image and optical image?
Thermal cameras provide images based on the heat energy (Infra-Red) emitted by the object, while optical cameras provide an image from the light reflecting off the object.

4. What is camera identification?
Camera identification is the use of Photo Response Non-Uniformity to identify the source of an image, linking one or more images to a camera, or linking images to images.

5. How does camera recognition work?
A facial recognition system uses biometrics to map facial features from a photograph or video and compares the information with a database of known faces to find a match.

6. What are the two types of thermal imaging scans?
There are two types of thermography: Passive and Active. Passive thermography uses an outside heat source, while active thermography measures the subject’s temperature without any external heat source.

7. What is thermal imaging in simple words?
Thermal imaging is the process of converting infrared (IR) radiation (heat) into visible images that depict the spatial distribution of temperature differences in a scene viewed by a thermal camera.

8. How do I use identify on my iPhone camera?
To identify something in a photo using visual lookup, tap a photo in a supported app like photos or messages. When your iPhone recognizes something in a photo, it will provide relevant information.

9. What is photo recognition?
Photo recognition is the identification and categorization of objects, people, or other items in an image or video by assigning a classification label to each frame.

10. What are the three different types of thermal imaging technology?
The three types of infrared imaging cameras are short wavelength, mid-wavelength, and long wavelength.

11. Are there different types of scans?
Yes, there are different types of scans, including X-rays, CT scans, MRI scans, and ultrasound scans.

12. How do I turn my phone into a thermal camera?

Answer:
To turn your phone into a thermal camera, you can use a thermal camera attachment or an app that utilizes the phone’s existing sensors to measure temperature and display it as a thermal image.

13. What is the accuracy of recognition in CCTV?

Answer:
The accuracy of recognition in CCTV systems varies depending on various factors such as camera quality, lighting conditions, and algorithm used. However, modern systems can achieve recognition accuracy rates of over 90%.

14. What are the limitations of thermal imaging?

Answer:
Some limitations of thermal imaging include its dependency on temperature differences for accurate imaging, difficulty in identifying small objects, and limited resolution compared to optical imaging.

15. How is camera identification used in forensics?

Answer:
Camera identification is used in forensics to link images or videos to a specific camera, aiding in investigations and providing evidence of the source of an image or video.