Do you know? What #DORI mean? Why is DORI required?
Do you know? What #DORI mean? Why is DORI required?
“Identification,” “Recognition,” “Observation,” and “Monitoring” you provided describe different levels of detail and focus in surveillance, DORI standard more specific definitions and requirements for pixel density and image size.
#Inspection:
#Purpose: To study facial expressions, the face must be the important section of the image the face of people (targets).
#Target Focus: The face must be the most important part of the image.
#Image Size: The target’s face must occupy at least 400% of the display size.
#Pixel Density: Not less than 1000 pixels per meter.
#Identification:
#Purpose: To identify individuals not previously identified upon entering an establishment, Target face must be the most important part of the image.
#Target Focus: The face must be the most important part of the image.
#Image Size: The target’s face must occupy at least 120% of the display size.
#Pixel Density: Not less than 400 pixels per meter
#Recognition:
#Purpose: To recognize and track previously identified individuals.
#Target Focus: The whole body and surrounding area.
#Image Size: The target must occupy at least 50% of the display size.
#Pixel Density: Not less than 125 pixels per meter.
#Observation:
#Purpose: To observe and guide crowds or public events.
#Target Focus: The whole body and surrounding area.
#Image Size: The target must occupy at least 25% of the display size.
#Pixel Density: Not less than 63.5 pixels per meter.
#Detection:
#Purpose: To detect the presence of targets without detailed recognition, primarily for early warning.
#Target Focus: The whole body and a wide surrounding area.
#Image Size: The target must occupy at least 10% of the display size.
#Pixel Density: Not less than 25 pixels per meter(#PPM).
#Note:
#Target measure: the body view at scale height of 1.6 meters as
represented by a human body or a standard test target.
#Pixel #density: The calculation of the number of pixels per meter at the
target.
These definitions provide clear criteria for different surveillance objectives, ensuring that camera systems are appropriately designed and configured to meet specific security needs. They also highlight the importance of both the physical size of the target within the image and the pixel density, which directly impacts the quality and usability of the footage for the intended purpose.
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Source: LinkedIn
Credits: Mr. Sujith CM
