Search results
Results from the WOW.Com Content Network
In general, all test pattern with a color bar, that includes red, green, blue, and the complementary colors cyan, magenta and yellow can be used to adjust hue and saturation in blue only mode. Particularly often the SMPTE test pattern or the HD version of the SMPTE is used for hue and saturation adjustment. These are in many cases already ...
The "luminance contrast" is the ratio between the higher luminance, L H, and the lower luminance, L L, that define the feature to be detected.This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices.
A Pluge signal as viewed on a monitor SMPTE colour bars showing a pluge signal in the bottom half second square from the right. For televisions the picture line-up generation equipment (PLUGE or pluge) is a greyscale test pattern used in order to adjust the black level and contrast of the picture monitor.
An LCD technology is dynamic contrast (DC), also called advanced contrast ratio (ACR), and smart contrast ratio (SCR [4]) and various other designations.When there is a need to display a dark image, a display that supports dynamic contrast underpowers the backlight lamp (or decreases the aperture of the projector's lens using an iris), but proportionately amplifies the transmission through the ...
Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.
Contrast sensitivity is typically expressed as the reciprocal of the threshold contrast for detection of a given pattern (i.e., 1 ÷ contrast threshold). [15] Using the results of a contrast sensitivity exam, a contrast sensitivity curve can be plotted, with spatial frequency on the horizontal, and contrast threshold on the vertical axis.
Make web pages easy to read for you! With simple keyboard shortcuts, you can zoom in or out to make text larger or smaller. In an instant, these commands improve the readability of the content you're viewing.
Snell & Wilcox SW2 and SW4 "Zone Plate" Test Chart (also referred to as Snell & Wilcox Test Pattern) were TV test cards introduced in the 1990s and used with NTSC, PAL and SDTV systems. [ 1 ] Popular versions of the test charts were made available on Laserdisc and DVD-Video , allowing home users and professionals to test and calibrate their ...