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Tonal range

Photography  Tonal gradation  Tone
04/17/2014

Tonal Range
By Vincent Bockaert
The tonal range of a digital image is the number of tones it has to describe the dynamic range.


Tonal 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.
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tonal range
(1) the entire area covering highlights, shadows, and all intermediate tones in a halftone; (2) the density difference of continuous tone images on either paper or film.

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).

After tonal range and color have been adjusted I usually apply the unsharp mask filter. Unsharp mask has three different adjustable parameters to adjust image sharpness.

Evaluating the Tonal Range
Dynamic range in music is the range between the faintest and loudest sounds that can be reproduced without distortion.

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.

Also, it should be remembered that, with modification of the method, the fraction of the tonal range represented as a normal negative can be increased.

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.

The Levels dialog box lets you correct the tonal range and color balance of an image by adjusting intensity levels of the image's shadows, midtones, and highlights. The Levels histogram serves as a visual guide for adjusting the image's key tones ...

The process was capable of making exquisite prints with a wide tonal range. Negatives were printed onto a "tissue" containing carbon and other pigments in a gelatin base.

-Tone separation - process of reducing the tonal range of a photograph to a very restricted range. The final result has strong highlights and deep shadows with a set number of intermediate tones. Also refereed to as Posterization.

Output levels allow you to change the images tonal range. Instead of pure black to pure white you can adjust the maximum whiteness or maximum blackness to a shade of grey if desired.

This negative is too "flat" (low contrast) it is lacking adequate tonal range usually caused by under-exposure or under- development.
This neg is considered normal. It has blacks and whites and a nice
range of grays.

Many would argue it is essential: Concepts of highlight and shadow detail, image contrast, film and exposure latitude and tonal range are all best understood by studying the black-and-white image.

I second Chris Leavens (and totally love your style man, especially your tonal range, very subtle and very easy on the eye), it feels great to be grouped with such a strong collection of fellow illustrators!
Thanks!
Mike.

Dynamic Range describes the ratio between the maximum (true black) and minimum (true white) tonal range of an image capturing or reproduction device (i.e. a camera, a scanner, a printer).
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Histograms are a very useful tool that many cameras offer their users to help them get a quick summary of the tonal range present in any given image.
It graphs the tones in your image from black (on the left) to white (on the right).

Oil reinforcement is a method of altering the tonal range of prints on matte or textured fiber papers. The dried print is rubbed with a medium consisting of two parts of turpentine to one of mastic varnish and one of linseed oil.

To achieve the impression of continuous tone we need to reproduce 256 differentiation's of tone from white to black. If we break down the tonal range into fewer differentiation's you begin to see the breaks between the individual tones.

Be aware of the tonal range on your three key compositional elements. Does the light detract from the subject or draw our eyes towards it?

Tags
dynamic range, Exposure, high dynamic range, highlights, histogram, tonal range
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It must be emphasized that this tutorial is not about creating HDR images in the traditional way; it is about bringing out as much tonal range as possible with a single image.
Tone Mapping ...

All three are warming filters in that they shift the color balance towards the red (warm) end of the tonal range.

From a photographic perspective, Leon's work here is outstanding! The excellent monochromatic tonal range and detail give his photograph an authentic 1940's silver gelatin appearance. His composition is also very engaging.

The LCD preview (when you can see it) does let you get the best possible exposure given this limitation, but it is impossible to capture the wide tonal range possible with black and white negative film.

Since most fiber paper these days is of better to premium quality, the idea when processing it is to get as much as you can from the paper. This usually means a longer tonal range, taking advantage of the better emulsions.

A digital camera's sensor, and in this case the iPhone's camera sensor, will have a certain tonal range or number of stops that "see" certain levels of light ranging from dark to bright. Most of the levels are on the right half of the range.

although as with all gemstones, very large sizes in rich, deep colors have always been rare. Designers celebrate amethyst as the ideal choice for jewelry because of its regal color, variety of sizes and shapes, affordability and wide tonal range from ...

Whether you are working with film images in a darkroom or on your home computer, black and white photography offers great latitude for altering exposure and tonal range to get a really dramatic image. Give it a try.

Another benefit of the NEF file is that depending on the camera, it retains 12-bit or 14-bit data, resulting in an image with a far greater tonal range than an eight-bit JPEG or TIFF file.

See also: See also: Image, Photograph, Camera, Light, Photography

Photography  Tonal gradation  Tone
04/17/2014

 
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