The relative difference in the film or detector density (darkness) between the image background and a feature of interest.
Is the ratio of light output from white sections and dark sections of a display with a checkerboard like pattern. This is typically much lower than the on/off contrast ratio.
Is the ratio of light output when the screen is white versus when it is black. These measurements are frequently exaggerated by manufacturers making published figures less useful.
The ratio between the peak white level and the black level of a display.
The ratio of the luminance in the light state to that of the dark side.
This concept refers to the difference in the lights intensity, meaning the ratio between the brightest white and blackish black.
A relationship between the extremes of brightness in a picture. Camcorders can cope with a contrast ratio of about 1:30. However, some subjects are more contrast (such as a person standing against a sunlit window where the ratio might be 1:1000) so some detail is lost on the video. The human eye is capable of coping with a contrast ratio of about 1:100.
The ratio between black and white. The larger the contrast ratio, the greater the ability of a projector to show subtle colour details and tolerate extraneous room light.
The ratio between the lightest element on a screen and the darkest. Higher contrast ratios generally make a display easier to read.
The relationship between the light and dark areas of an image. An image with low contrast tends to look dull and flat.
A ratio between white and black in an image.
The difference between the brightest whites and darkest blacks a TV can display. High contrast ratios are important for a TV to be able display subtle color variations and to overcome ambient light.
A mathematical expression describing the difference in luminance between two areas; the contrast ratio can be expressed as L1/L2 or as (L2L1)/L2, where L1 is the luminance of the first area and L2 is the luminance of the second area.
The difference between the lightest and darkest portions of an image. The larger the contrast ratio, the greater the ability of a projector to show subtle color details and tolerate a room's ambient light.
The ratio of the brightest and darkest images a display can reproduce.
The ratio between white and black. The larger the contrast ratio the greater the ability of a projector or display to show subtle color details and tolerate extraneous room light. There are various methods used to measure contrast; contrast ratio figures should best be used as a guide only.
The difference between the dark part of the picture and the light are of the picture.
A term used in hiding power determinations, meaning the brightness of a coating over a black surface area divided by the brightness of the coating over a white area.
The brightness of a display at full white over the brightness of a display at full black. Because the black value is greatly affected by ambient light, some TV technologies calculate contrast ratio in darkened rooms.
The ratio between the lightest color (white) and the darkest (black), expressed as 400:1, for example. The larger the contrast ratio, the better the projector deals with subtle colors and ambient light. When comparing projector specifications, compare the same type of contrast: full on/off or ANSI. For any given projector, full on/off contrast ratio will be larger than ANSI.
the difference in luminance between a selected (on) pixel and an unselected (off) pixel.
This is the ratio between the lightest and darkest portions of an image. Projectors with higher contrast ratios are more able to show subtle colour details.
Contrast ratio is the ratio between white and black. The larger the contrast ratio the greater the ability of a projector to show subtle color details and handle rooms that have additional light sources as well as the projector. There are two methods for measuring the contrast ratio Full On/Off (measures the ratio of the light output of an all white image and the light output of an all black image), and ANSI contrast (measures contrast between black and white alternating rectangles). Most projector manufacturers use Full On/Off as it is a higher ratio than the ANSI standard.
Contrast Ratio is the difference in luminance level between the brightest white and the darkest black. The higher the contrast ratio, the deeper and richer the colors are.
Described at the ratio between white and black. The larger the contrast ratio, the greater ability of a projector to show subtle color details, present a clearer picture, and tolerate ambient room light. There are two methods for determining contrast ratio in the projection industry: 1) Full On/Off contrast measures the ratio of the light output of an all white image (full on) to the light output of an all black image (full off). 2) ANSI contrast ratio is measured using a pattern of alternating white and black rectangles. The average light output from the white rectangles is divided by the average light output of the black rectangles to determine the ratio. In comparing contrast ratios, ensure you are comparing the same type of contrast ratio.
A mathematical expression of the luminance ratio for two adjacent areas. As used herein, contrast ratio is defined as higher luminance/lower luminance.
The ratio between the whitest and blackest portions of an image. The larger the contrast ratio the greater the ability of a projector to show subtle color details and tolerate extraneous room light.
The ratio of maximum white to minimum black on the projected test picture. The larger the ratio the higher the contrast.
The difference in luminance between a white square centered on the screen and the black surrounding area. A relationship between the extremes of brightness in a picture.
Measures the difference between the brightest whites and the darkest blacks a display can show. The higher the contrast ratio, the greater the ability of a display to show subtle color details and tolerate ambient room light. Contrast ratio is an important spec for all types of TV display, but especially for front projectors.
Ratio of lightest to darkest areas in an image.
The contrast ratio refers to the ratio of darkness to brightness. Many LCD projectors have a contrast ratio of 400:1. This means that the lumen output of a projected white image is 400 times greater than that of a projected black image.
Contrast Ratio: Range from the lightest to the darkest values in a picture. Low contrast is shown mainly as shades of grey, while high contrast is shown as distinct blacks and whites. Typical video contrast ratio is 100 to 1 or 100 discernible shades of grey between black and white.
A method of measuring the dynamic range. A contrast ratio of 15:1 (passive matrix LCDs), offers washed out colors, little detail, and images that can barely survive with significant ambient light. Projectors with Active matrix TFTs have ratios to 100:1, DLPs from 125:1 and Poly-Si LCDs 200:1. By comparison transparency film (i.e. 35mm slides) have contrast ratios over 500:1.
The ratio of the luminance between the dark and light areas of the display.
Range of light and dark values in a picture, or the ratio between their maximum and minimum values. A high contrast ratio (example: 3000:1) provides deeper blacks and brighter whites.
The ratio of the maximum white to the minimum black level possible for a particular spot on the image with the background light levels factored out.
The ratio of intensity between the brightest white and the darkest black of a particular device or a particular environment.
The contrast ratio is the comparison between the darkest black and the brightest white that can be shown onscreen. The higher the contrast ratio, the more clear definition there is between light and dark.
The ratio between the reflectance of the brightest and darkest parts of the image, commonly referred to as contrast.
Contrast ratio is the ratio between the brightest and darkest areas of an image. It is the ratio of high light output divided by low light output. A larger contrast ratio has the ability to show subtle color details even with adequate room lighting present. Low Contrast Televisions with a contrast ratio less than 500:1 usually provide low contrast. Medium Contrast Medium contrast televisions provide an image that is clear and visually appealing. Medium contrast TV's are represented by a ratio of 500:1 to 1200:1. High Contrast High contrast televisions are those greater than a 1200:1 ratio. The images represented in this category are ultimately crisp, with vivid color and superior image quality.
An image's contrast ratio is the difference between the lightest and darkest sections of the image. A large contrast ratio indicates that the projector works well despite extraneous light and can display color subtleties and a very high degree of detail. Projectors featuring DLP® technology typically deliver a higher contrast ratio than is possible with competing technologies.
The difference between the darkest and lightest areas of a subject, stated in a mathematical ratio.
Ratio between the brightness or intensity measurement taken when the screen is displaying a blank video signal and a full, white video signal. This ratio determines the readability of the display so as to measure "depth" of an image or as a measure of how well the image can be seen in high ambient light.
is the brightness of an all-white area divided by the brightness of an all black area.
Contrast Ratio indicates the difference in light intensity between the brightest white and the darkest black of computer monitors. A high contrast ratio, such as 400:1, represents a better color representation (the better the information will appear against a darker background) on the monitor than a lower contrast ratio, such as 150:1. The term is used more frequently in reference to LCD monitors than CRT monitors.
A measure of opacity. The ratio of the luminous reflectance of a specimen backed with black material of specified reflectance to reflectance of the same specimen backed with white material of specified reflectance.
A measure of the maximum and minimum light levels a TV can produce when fed the signals for maximum white and black, respectively.
This is the difference in light intensity between the brightest white and the darkest black.
The ratio of brightness of the whitest areas to the blackest areas of an Image.
The ratio between white and black. The larger the contrast ratio the greater the ability of a projector to show subtle color details and tolerate extraneous room light. There are two methods used by the projection industry: 1) Full On/Off contrast measures the ratio of the light output of an all white image (full on) and the light output of an all black (full off) image. 2) ANSI contrast is measured with a pattern of 16 alternating black and white rectangles. The average light output from the white rectangles is divided by the average light output of the black rectangles to determine the ANSI contrast ratio. When comparing the contrast ratio of projectors make sure you are comparing the same type of contrast. Full On/Off contrast will always be a larger number than ANSI contrast for the same projector. Diagonal Screen One corner of a screen to the opposite corner. A 9FT high, 12FT wide, screen has a diagonal of 15FT. If the screen is 12x12, it would still rate 15FT diagonal since that would be the diagonal usable.
The difference in luminance between the unselected area and the selected area.
(LCD Only) A measurement of the light transmission between bright and dark pixels. Higher contrast ratios result in more vivid images. A typical contrast ratio is "200:1".
The contrast ratio is the measure of the brightest luminance the screen can achieve against the darkest luminance. The darkest luminance is important to the image because blacks will be truer to their real colour, rather than appearing grey and washed out. The contrast ratio as an approximate measure of how the image will appear in different lighting conditions. The higher it is, the better the contrast, although the measurement process is open to some different interpretations by different manufacturers.
This the ratio of the high light ouput level divided by the low light output level. In theory, the contrast ratio of the television system should be at least 100:1, if not 300:1. In reality, there are several limitations. In the CRT, light from adjacent elements containments the area of each element. Room ambient light will contaminate the light emitted from the CRT.
Contrast Ratio is the ratio in luminance (Cd/m2) on an LCD screen between the selected and unselected areas, or all black and all white areas.
This is the difference between the white portion of a screen and the black portion. It is often used as a marketing device when selling monitors, and usually looks like 400:1 or 1500:1. The better a contrast ratio, the better detail will show up in dark pictures. The higher contrast ratios will always be found on more advanced, higher end, and more expensive devices. A typical computer monitor will display a contrast ratio of 400:1, but with HDTV screens some display upwards of 1500:1 and some even go as high as 3000:1.
Ratio between white and black. The greater the contrast ratio, the greater the ability to show subtle colour details.
The measurement of the difference in light intensity between the brightest white and the darkest black.
The contrast ratio is a metric of a display system, defined as the ratio of the luminosity of the brightest and the darkest color the system is capable of producing. High contrast ratio is a desired aspect of any display, but with the various methods of measurement for a system or its part, remarkably different values can be measured of the same subject.