digital cameras….. how do they work?!?!? alisa pulver brooke carstensen alisa pulver brooke...
TRANSCRIPT
Digital Cameras….. How Do They
Work?!?!?
Digital Cameras….. How Do They
Work?!?!?
Alisa PulverBrooke Carstensen
Alisa PulverBrooke Carstensen
First CameraFirst Camera The first form of a
camera was created by the Chinese in the 4th century B.C. This camera, also known as a camera obscura, was a darkened room with a hole in the wall or drapes that projects an image of the outside world onto a distant wall.
The first form of a camera was created by the Chinese in the 4th century B.C. This camera, also known as a camera obscura, was a darkened room with a hole in the wall or drapes that projects an image of the outside world onto a distant wall.
The first roll-film camera was created in
1888 by George Eastman. Shortly after the company Eastman Kodak emerged as a
result of his invention. Following this
breakthrough, the camera continues to
evolve rapidly.
The first roll-film camera was created in
1888 by George Eastman. Shortly after the company Eastman Kodak emerged as a
result of his invention. Following this
breakthrough, the camera continues to
evolve rapidly.
TechnologyTechnology
The technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip.
This process requires an image sensor to detect light color and intensity.
The technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip.
This process requires an image sensor to detect light color and intensity.
Another FirstAnother First
The first truly digital camera, pixel based camera with an image sensor AND a storage device (which allows the picture to be saved) came out in 1991.
This Kodak creation was used specifically for photojournalism.
Digital cameras would not be used commercially for three more years.
The first truly digital camera, pixel based camera with an image sensor AND a storage device (which allows the picture to be saved) came out in 1991.
This Kodak creation was used specifically for photojournalism.
Digital cameras would not be used commercially for three more years.
Compare and ContrastCompare and Contrast
Film Cameras: Film Chemicals
Film Cameras: Film Chemicals
Digital Cameras:BatteriesBuilt in Computer Record image
electronically
Digital Cameras:BatteriesBuilt in Computer Record image
electronicallyAll cameras capture and record an imageHave the same basic parts:
Lens Shutter
A beam splitter directs light to the different sensors.
The camera records each of the three colors at each pixel location.
http://electronics.howstuffworks.com/digital-camera3.htm
What is a CCD? What is a CCD?
Stands for Charge-Coupled Device
Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera.
Stands for Charge-Coupled Device
Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera.
CapacitorsCapacitors
After the CCD and photosites sense the light, an electronic device called a capacitor stores a charge or voltage that is equal to the light’s intensity.
This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together).
After this process a register makes the appropriate calculations and the image is formed
After the CCD and photosites sense the light, an electronic device called a capacitor stores a charge or voltage that is equal to the light’s intensity.
This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together).
After this process a register makes the appropriate calculations and the image is formed
Basically….Basically….
The CCD sensor is a tool that creates a map of photosites based on the electric charge created when the photons of light slam into the sensitive picture elements.
The CCD sensor is a tool that creates a map of photosites based on the electric charge created when the photons of light slam into the sensitive picture elements.
Pixels and ResolutionPixels and Resolution
Photons are converted into electrical charge
Electrons are then sent to an analog-digital-converter
Photons are converted into electrical charge
Electrons are then sent to an analog-digital-converter
Information is then turned into a digital binary form and can be viewed on the LCD screen
Fixed & Removable storage systemsMemory cardFlash stick
Information is then turned into a digital binary form and can be viewed on the LCD screen
Fixed & Removable storage systemsMemory cardFlash stick