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The Similarities and Differences Between the Human Eye ans a Camera

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Ariana Bello

on 31 March 2014

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Transcript of The Similarities and Differences Between the Human Eye ans a Camera

The Similarities and Differences Between the Human Eye and a Camera
First Similarity

Second Similarity
Third Similarity
Forth Similarity
First Difference
Second Difference
Third Difference
Focal Length
A cameras focal can be changed simply by changing or adjusting the lens.
You can change a cameras lens in order to get a shorter or longer focal length.
The human eye has a set focal length of 22mm, but it is affected by the curve of the eye making the detail diminish the farther you get from the central image of the eye.
Resolution
The human has a better resolution then a camera.
The common resolution for the human eye in the central vision is 20/20 vision, or 52 mega pixels.
A cameras come in the rage of 5-20 mega pixels, meaning the eye has a greater perception of detail.
Basic Components

Both have something to control the amount of light.
Both eye and camera have lenses.
Both have a receptor for the image; retina for the eye and the film or digital imaging sensor.
Aperture

The Camera and the eye both have something to control the amount of light that is absorbed.
The Aperture of the camera controls the amount of light being exposed.
The iris of the eye expands to allow more light in and shrinks to limit the amount of light entering.
When the light enters the eye it is shown on the retina.
The retina is made up of a patch of photo receptors that transfer the light into electrical pulses that then transfer to the brain.
When light enters a camera it travels to the digital imagery sensor and is transferred into pixels forming the image, which is the stored in a memory card.
Formation of Image
Forth difference
Sensitivity to Light
Cameras are uniformly sensitive to light.
Human eyes have a greater sensitivity to light in the dark.
When Trying to capture a image at night with a camera the photo may come out blurry; this is because the amount of light entering the camera is so low.
Therefore at night what you see and what you capture with you camera are going to be different.
Blind spots
Cameras do not have blind spots; The Focus of the image stays constant.
The human eye has blind spots; The focus diminishes the farther you get from the center of the eye.
Function
The most obvious similarity is that the eye and the camera have the same function; to capture an image.
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