CHAPTER 3 - Sensor

What device is used to capture the image in a surveillance camera?

• Sensor

• Lens

• Cable

• Power

What are the photosensitive diodes in an image sensor called?

• Photosynthesis

• Photodiode

• Photosite

• Photograph

How do larger image sensors affect image quality?

• They result in more noise in the image.

• They have no effect on image quality.

• They have smaller photosites, resulting in less clear and less bright images.

• They capture more light and less noise, resulting in clearer, brighter, and sharper images.

What happens to light as it passes through a lens in a camera?

• It is blocked

• It is scattered

• It is reflected back

• It is focused on the image sensor

What is the role of each photosite on an image sensor?

• To block the light

• To scatter the light

• To focus the light on the sensor

• To correspond to a pixel on the image

How does the brightness of light affect the image sensor?

• The brightness of light makes the image more blurry

• The brightness of light has no effect on the image sensor

• The brighter the light, the fewer electrons are generated

• The brighter the light, the more electrons are generated

How does interlaced video create a smooth video image?

• By sending signals in two intervals where only the odd lines, then the even lines of each frame are drawn alternately

• By sending signals in one interval where all lines of each frame are drawn at once

• By sending signals in a random order

• By sending signals in two intervals where only the even lines, then the odd lines of each frame are drawn alternately

How does Progressive scan differ from interlaced video?

• It creates a picture signal with double the scan lines of a conventional interlaced picture

• It creates a picture signal with half the scan lines of a conventional interlaced picture

• It creates a picture signal with equal number of scan lines of a conventional interlaced picture

• It creates a picture signal by sending signals in two intervals where odd lines and even line drawn alternately

How does Backlight compensation work in the camera?

• By adjusting the focus of the image

• By adjusting the brightness of the image

• By adjusting the color balance of the image

• By adjusting the exposure control on the camera

What is the purpose of Backlight Compensation?

• To prevent the subject appearing dark in images where a bright light source is behind a subject of interest.

• To enhance the brightness of the subject in images where a bright light source is behind a subject of interest.

• To enhance the color of the subject in images where a bright light source is behind a subject of interest.

• To adjust the focus of the subject in images where a bright light source is behind a subject of interest.