The creation of color is based on a color filter, which is located in front of the CCD or CMOS chip. It is red, green or blue and changes its color from pixel to pixel. Therefore, the filter is called a color filter array or, after its inventor, Bayer filter. Using these raw digital images, the module "signal enhancement" creates an image, which meets aesthetic requirements. The same is true for the audio data.
In the final step, the module compresses the image and audio data and outputs them - in the case of video cameras - as a DV data stream. In the case of photo cameras, single images may be output and, if applicable, voice comments as files.
The application domains of industry, medicine, astronomy, microscopy and science often use special monochrome cameras. They forgo any signal enhancement and thus output the digital image data in its raw state.
Some special models of color camera are only capable of outputting raw digital image data. Such cameras are called ColorRAW or Bayer cameras. They are often used in industry, medicine, astronomy, microscopy and science. In form of photo cameras, they are used by professional photographers. Semi-professional photo cameras often offer an optional RAW mode.
The enhancement of the raw digital data takes place outside the camera on a computer and therefore the user is able to adapt it to a particular application.
Famous quotes containing the word signal:
“The experience of a sense of guilt for wrong-doing is necessary for the development of self-control. The guilt feelings will later serve as a warning signal which the child can produce himself when an impulse to repeat the naughty act comes over him. When the child can produce his on warning signals, independent of the actual presence of the adult, he is on the way to developing a conscience.”
—Selma H. Fraiberg (20th century)