Digital camera:
•The basic technology of converting analog information to digital information is used as the underlying mechanism of a digital camera.
•Images are taken in electronic format by a digital camera which is then converted to a binary format.
Construction:
A digital camera consists of the following basic parts:
a.Lenses: It focuses the image, refracting the light rays comes from the object so that they converge into a coherent image.
b.Diaphragm: It determines the amount light enters through the lenses. It measures as f-number, the greater the f-number the smaller the opening of the diaphragm.
c.Shutter: It determines the amount of time of exposure. It is measured in fractions of a second. The faster the shutter the smaller the exposure.
d.CCD (Charge Coupled Device): These are a group of sensors that converts light into corresponding electric charge.
Working:
•While taking a picture the lens focuses the light rays come from the object made into a coherent image.
•Diaphragm determines amount of light to be entered and shutter speed determines time of exposure.
•Then lights made fall onto sensor (CCD) to get corresponding electric charge.
•After taking the picture to convert analogue signal (electric charge from photo sites) to Digital signal in binary form an ADC converter is used.
•Each of the charge stored in photo sites assigns to a binary value, storing them as pixels.
•Pixel per square inches determines the resolution of the camera, which indicates the size and quality of image.
•Digital cameras have an internal memory chip that is used to store images.
•The memory chip stores the digital information about an image that has been collected within the camera.
•Once the image is digitalized, it is compressed by a microprocessor and stores as image file (JPEG, TTF etc.)
•The basic technology of converting analog information to digital information is used as the underlying mechanism of a digital camera.
•Images are taken in electronic format by a digital camera which is then converted to a binary format.
Construction:
A digital camera consists of the following basic parts:
a.Lenses: It focuses the image, refracting the light rays comes from the object so that they converge into a coherent image.
b.Diaphragm: It determines the amount light enters through the lenses. It measures as f-number, the greater the f-number the smaller the opening of the diaphragm.
c.Shutter: It determines the amount of time of exposure. It is measured in fractions of a second. The faster the shutter the smaller the exposure.
d.CCD (Charge Coupled Device): These are a group of sensors that converts light into corresponding electric charge.
Working:
•While taking a picture the lens focuses the light rays come from the object made into a coherent image.
•Diaphragm determines amount of light to be entered and shutter speed determines time of exposure.
•Then lights made fall onto sensor (CCD) to get corresponding electric charge.
•After taking the picture to convert analogue signal (electric charge from photo sites) to Digital signal in binary form an ADC converter is used.
•Each of the charge stored in photo sites assigns to a binary value, storing them as pixels.
•Pixel per square inches determines the resolution of the camera, which indicates the size and quality of image.
•Digital cameras have an internal memory chip that is used to store images.
•The memory chip stores the digital information about an image that has been collected within the camera.
•Once the image is digitalized, it is compressed by a microprocessor and stores as image file (JPEG, TTF etc.)
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