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Digital Cameras….. How Do They Work?!?!? Alisa Pulver Brooke Carstensen Alisa Pulver Brooke Carstensen.

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Presentation on theme: "Digital Cameras….. How Do They Work?!?!? Alisa Pulver Brooke Carstensen Alisa Pulver Brooke Carstensen."— Presentation transcript:

1 Digital Cameras….. How Do They Work?!?!? Alisa Pulver Brooke Carstensen Alisa Pulver Brooke Carstensen

2 First Camera  The first form of a camera was created by the Chinese in the 4 th 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.

3 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.

4 Technology FThe technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip. F This process requires an image sensor to detect light color and intensity. FThe technology used in the creation of the digital camera converts images into electrical or digital impulses and records them on a magnetic strip. F This process requires an image sensor to detect light color and intensity.

5 Another First FThe 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 FThis Kodak creation was used specifically for photojournalism. FDigital cameras would not be used commercially for three more years. FThe 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 FThis Kodak creation was used specifically for photojournalism. FDigital cameras would not be used commercially for three more years.

6 Compare and Contrast FFilm Cameras: FFilm FChemicals FFilm Cameras: FFilm FChemicals FDigital Cameras: FBatteries FBuilt in Computer F Record image electronically FDigital Cameras: FBatteries FBuilt in Computer F Record image electronically FAll cameras capture and record an image FHave the same basic parts : FLens F Shutter

7 A beam splitter directs light to the different sensors. The camera records each of the three colors at each pixel location.

8 What is a CCD? FStands for Charge-Coupled Device F Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera. FStands for Charge-Coupled Device F Comprised of millions of tiny sensor points called photosites that sense the light that enters the camera.

9 Capacitors F 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. F This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together). F After this process a register makes the appropriate calculations and the image is formed F 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. F This charge is then passed along to another Capacitor (the CCD has a chain of capacitors that are coupled together). F After this process a register makes the appropriate calculations and the image is formed

10 Basically…. F 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.

11 Pixels and Resolution

12 FPhotons are converted into electrical charge FElectrons are then sent to an analog- digital-converter FPhotons are converted into electrical charge FElectrons are then sent to an analog- digital-converter FInformation is then turned into a digital binary form and can be viewed on the LCD screen FFixed & Removable storage systems FMemory card FFlash stick FInformation is then turned into a digital binary form and can be viewed on the LCD screen FFixed & Removable storage systems FMemory card FFlash stick


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