What is an image sensor

* What is image sensor

?* The type of image sensor

?* How an Image sensor Create a Digital Image

?* Sensor size/Sensor Pixel Size

?* Two main types of image sensors:CMOS & CCD

?* Typical CMOS Camera Layout

?

What is an image sensor

• Convert incoming light (photons) into an electrical signal that can be viewed, analyzed, or stored.
• A solid-state?device and serve as one of the most important components inside?a?machine vision camera.
• Image sensors are able to?gather light intensity information, but are unable to reproduce colors.In order to create a color image,?an?RGB (red, green, blue) filter?is placed in front of the photodiodes.

How an Image sensor Create a Digital Image

• Image sensor with a color filter converts?the light received from the lens into digital signals.
• After?processing those signals, the data is then converted into an image and displayed on-screen.

Sensor size:

• Larger?sensors having either higher resolutions or larger pixel sizes?than smaller sensors.

?Sensor Pixel Size:

• Pixel size is measured in micrometers (μm)
• A CMOS pixel consists of?①a photodiode②an amplifier,③reset gate④transfer gate⑤floating diffusion.

Two main types of image sensors: CMOS?& CCD

CCD:

More expensive

Use more power

Less digital noise

Better in low light

CMOS:

Less expensive

Use less power

More digital noise

Rolling shutter issues

?

Typical CMOS Camera Layout.

Image sensors provide us the ability to capture high quality images and videos?more directly into a digital format for easy usage.

[Articles from]

https://thinklucid.com/tech-briefs/understanding-digital-image-sensors/

https://www.keyence.com/ss/products/microscope/microscope_glossary/terminology/image_sensor.jsp

https://www.picturecorrect.com/image-sensors-explained-in-under-6-minutes/