By Vincent Bockaert
The tonal range of a digital image is the number of tones it has to describe the dynamic range.
In photography, tonal range refers to mid-tone values expanding to occupy the scale between the lightest and darkest points of an image.
TONAL RANGE - The various shades of gray between solid black and absolute white.
TONAL RANGE - The range between the lightest and darkest areas of an image. Also known as Dynamic Range. A picture containing very bright areas and very dark areas has a "wide" tonal range.
Tonal Range - a photographic term used to describe the quality of color and tone ranging from an image's darkest shadow through to the brightest highlight details, including all of the transitions in between these extreme levels.
U is for...
Expand Tonal Range Using A Single Image
RAW files help to reveal greater shadow and highlight details ...
Extreme tonal range Sometimes, the range of tones is so great that no exposure setting will cope with both the shadow and highlight details. It may, however, be possible to sacrifice one or other and still have a usable image.
6) Tonal Range
For me, Noiseware is the most robust noise-reduction software available. Ironically, while it offers the most sophisticated feature set, very often the default settings when you first open an image are all you're likely to need.
The tonal range of the final image depends on the characteristics of the display medium. Monitor contrast can vary significantly, depending on the type (CRT, LCD, etc.), model, and calibration (or lack thereof).
3) WIDEST TONAL RANGE
Digital SLRs are dynamically challenged. In contrasty light they have a hell of a time with highlight and shadow detail. Sure, they've improved, and RAW helps.
The original tonal range in this desert scene is mostly in the midtone area. There are very few pixels in the 0-30 range and very few in the 240-255 range.
Evaluating the Tonal Range
Dynamic range in music is the range between the faintest and loudest sounds that can be reproduced without distortion.
That was your camera's electronics trying to compensate for the wide tonal range of your relatives - bright shirts and blouses but dark, shaded eyes or faces.
The colour version of the above images seems very high contrast with a large tonal range, but in truth we can see that its overall tonality is the same, broadly speaking.
Raw files also have two other important advantages, their ability to capture a bit more tonal range than JPEGs and the ability to convert raw files in 16 bit mode. Like negatives vs.
Global Contrast: The range between the lightest and darkest portions of your image and the distribution of contrast through the tonal range to accentuate the most important elements within the photo.
Long tonal range, from highlights to shadow detail, is required. Lighting ratios must be calculated and adjusted with care, and exposure calculations must be precise.
Any edit that affect the tonal range or contrast of an image will do this. What may have been a smooth gradient in the original is no longer smooth.
One way to extend the tonal range of a digital image is by making two exposures of a scene. Shooting in Manual mode, make one exposure configured to capture the best highlight detail. Make a second exposure to capture the best shadow detail.
When you spot a photo that looks like it would average out into a tonal range that is a lot different from 18% then warning bells should sound and you will then set about helping your lightmeter by compensating the reading that it is given.
As can be seen in the detail images above, there was little difference observed in the tonal range of the scans.
The first post-processing lesson was about manipulating tonal range and balance through the levels control. With Levels, you can change the black point, white point, and midpoint (aka gamma).
The Output Levels allow a photographer to compress an image into a smaller tonal range (e.g., 10 -- 245) than the 0 -- 255 range that is normally used. The left value sets the darkest tone, and the right value sets the lightest tone.
The region where most of the brightness values are present is called the "tonal range.
When a scene is well lit and has an average tonal range (with nothing being too dark or too light) and the light is fairly even, getting a good exposure is a pretty simple process.
Tonal range: The range of tones between the lightest and darkest areas.
T setting: Time setting. The shutter remains open after it is pressed and released. It is closed again by pressing the shutter release.
TTL: Through-the-lens metering.
With flatbed scanners that are being used to scan prints this isn't too important because the tonal range has already been reduced in the printing process.
The purpose of the graduated neutral density filter is to create a much narrower tonal range between the sky and land so that the overall effect of the image isn’t as contrasty. The top of one of these filters is dark and the bottom is clear.
Unlike color photography, black and white images cannot differentiate between color tonal range.
An Adobe Photoshop functionality that allows to adjust the tonal range of a digitized image.
A graph used in digital photography that displays tonal range. A straight line at 45 degrees shows that the contrast is unchanged. To modify contrast you can usually click anywhere on the line and pull it in any direction.
Now choose a tint colour for each tonal range using the Hue sliders. Alternatively, you can click the small colour swatch next to each tonal range and use the colour picker to set both hue and saturation.
Canon's CMOS (Complementary Metal Oxide Semiconductor) sensor captures images with exceptional clarity and tonal range, and offers the most pixels in its class.
See also: Image, Photograph, Camera, Light, Photography