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Equalization (communications) In telecommunication, equalization is the reversal of distortion incurred by a signal transmitted through a channel. Equalizers are used to render the frequency response —for instance of a telephone line— flat from end-to-end. When a channel has been equalized the frequency domain attributes of the signal at ...
Apochromat. Chromatic aberration of a single lens causes different wavelengths of light to have differing focal lengths. An apochromat, or apochromatic lens (apo), is a photographic or other lens that has better correction of chromatic and spherical aberration than the much more common achromat lenses. The prefix apo- comes from the Greek ...
Histogram equalization accomplishes this by effectively spreading out the highly populated intensity values which are used to degrade image contrast. The method is useful in images with backgrounds and foregrounds that are both bright or both dark. In particular, the method can lead to better views of bone structure in x-ray images, and to ...
Petzval portrait lens. The Petzval objective, or Petzval lens, is the first photographic portrait objective lens (with a 160 mm focal length) in the history of photography. [1] It was developed by the Slovak mathematics professor Joseph Petzval in 1840 in Vienna, [2] with technical advice provided by Peter Wilhelm Friedrich von Voigtländer [de].
There is more to our images than you can see at first look. If you click on any image on Wikipedia, you will go to a page about the image itself. This image page will have information on the image's source, authorship, and copyright licensing, along with a more detailed description of the image. Unless the image is very small, you will see a ...
Equalization (audio) A stereo graphic equalizer. For the left and right bands of the sound content, there are a series of vertical faders, which can be used to boost or cut specific frequency ranges. This equalizer is set to a smiley face curve, in which the mid-range sound frequencies are cut. Equalizers are also made in compact pedal-style ...
Wikipedia:Picture tutorial and Wikipedia:Image markup for how to add the image to articles. Selecting the Stetson image from Fort Hood and downloading it. Converting the image from GIF to JPEG. Renaming the image to "Image:StetsonHatFortHoodArmy.jpg". Uploading it as Image:StetsonHatFortHoodArmy.jpg.
Exposure sheet. An exposure sheet (also referred to as camera instruction sheet, dope sheet or X-sheet) is a traditional animation tool that allows an animator to organize their thinking and give instructions to the camera operator on how the animation is to be shot. It consists of five sections, and is a bit longer and a bit narrower, than A4.