How To Increase Hue Contrast In Your Images With Lab Color Mode

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Instead of RGB, you can use Lab color mode to increase hue contrast in your images in powerful ways that no other color space offers.

How do you do it?

In Lab color mode use Curves to accentuate contrast by creating s or reverse s curves for the a and b but not the L channels without moving the midpoint.

It’s that simple. (Yes, I promise I’ll expand on this.)

However, when you use this technique there are many details that it pays to be aware of.

When To Use It

While this technique can be used on any image, it’s particularly useful when you are processing files that are predominantly one color – forest greens, oceanic blues, sandstone reds, etc. The resulting hue contrast gives these images more life by making subtle variations in hue more pronounced and more three dimensional by accentuating the differences in hue between highlights and shadows.

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Lab a and b channels adjusted

Comparing It To Similar Techniques

This technique is similar to split-toning or cross-toning images, introducing one color into the highlights and another into the shadows, except that the hues are the captured colors accentuated rather than colors that are arbitrarily added. (For this reason this technique won’t work with black-and-white images.)

This technique is similar to increasing saturation or vibrance, which also makes different hues more pronounced but sometimes intensifies them to the point of making them appear unnatural. By comparison the modest increase in saturation boosting hue contrast in Lab produces is surprisingly naturalistic – and you may choose to keep it or not.

To the untrained eye the differences between this technique and others may seem subtle but once you train your eye you’ll appreciate the color richness it offers; they can approximate but never equal it. It’s like comparing the sound qualities of low and high fidelity audio recordings. Lab offers hi-fi color.

What The Heck Is Lab Anyway ?


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Why Neutrality In Your Images Is So Important

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Achieving neutrality in your images is so important. Few things are as important. Why?
Here are four reasons.

1 – The color in your images will appear more believable.

Casts make colors seem false. This is true for memory colors like fire engine red, sky blue, and grass green, particularly true for flesh tones (Are you feeling a little bit green today?), but nowhere more true than with neutrals. There can be some debate about which blue is sky blue. On which day? At what time? But there’s very little debate about what gray is truly neutral. Sure those neutral grays can vary in brightness but not hue or saturation. Make the neutrals in your images truly neutral, and you’ll make the other colors in your images more believable.

2 – The colors in your images will look more saturated.

When you remove color casts you can see the colors beneath them more clearly. The color beneath appears purer. This effect won’t be as strong as if you had increased their saturation. It will be subtler but more convincing. Oversaturated colors often appear false and you’ll have to work the saturation of your colors twice as hard if they contain color casts. Clean color is a great foundation to add saturation to. You can get the best of both worlds.

3 – Your images will appear more three-dimensional.

Without casts, the colors in your images will have more contrast.

They’ll have more luminosity contrast. When they’re not unified by a color cast, luminosity or brightness values will become more distinct.
They’ll have more hue contrast. Often shadows will appear cooler while highlights appear warmer, making them appear even more different than they already are.

They’ll have more saturation contrast. When neutrals are neutral, you’ll get maximum contrast between them and the more saturated colors in your image.

Add these three kinds of color contrast together, and you’ll see a dramatic difference in your images. The illusions of three-dimensional depth and volume in our two-dimensional images will be significantly amplified.

Once again, these effects will be powerfully felt but not obvious. Clean colors won’t call attention to themselves because they seem natural, unlike imbalanced images that you’ll need to over-process to get similar effects.

4 – You’ll have the best color foundations to make black-and-white conversions from.

It sounds strange when you first hear it but color matters even when you’re going to remove it. The maximum hue and saturation separation created by achieving neutrality gives you more control over how dark or light to make hues during conversions to black and white.

5 – You’ll know color management is working.

Neutrals are one of the first things to look for when you’re checking your color management for printing, whether it’s evaluating a viewing light, examining a profile, a rendering intent, or a media setting. You not only look for neutral midtones but also neutrals throughout the entire tonal scale (gray balance). If you’ve achieved both your color management is working correctly. If not, check your system.
I’m sure you’ll find a few more reasons why neutrality in your images is so important.

Achieving neutrality in your images isn’t something you do for all of your images. There are many exceptions. Nevertheless, being able to achieve neutrality in your images is a critically important skill. When you know how and why to achieve neutrality all of your color choices become more sensitive, deliberate, and meaningful.

Read more on Color Adjustment here.
Learn more in my digital printing and digital photography workshops.

How To Master Saturation In Your Images

Saturation Is An Essential Key To The Success Of Your Images

One of the most distinctive features of a visual artist’s use of color is their use of saturation. When you think of Ansel Adams’ photographs, you think of neutral images rather than highly saturated ones. When you think of Matisse’s paintings, you think of supersaturated images rather than neutral ones. Think of your use of saturation as an essential element that will help you define your own signature style.
One of three elements of color (luminosity, hue, and saturation), saturation can give your images specific qualities of energy and light. Here are five things you can do with saturation: one, increase energy and impact; two, add complexity by revealing hidden hues; three, restore life to listless hues; four, calm colors that are distracting; or five, produce softer semi-neutral and pastel palettes.

Read more about Saturation here.

Together, Adobe Lightroom and Photoshop offer an impressive, almost overwhelming, array of possibilities for controlling saturation. Do three things before you choose a tool to adjust saturation with. First, understand and develop your eye for saturation. Second, adopt a consistent strategy for exploring the possibilities it offers your images. Third, understand the differences between the tools, both how they function and the effects they produce.

Know What To Look For

Knowing what to look for will help you choose a direction, a tool, and how far to go with it. It will also help you evaluate the results you produce – and quite possibly improve them further.


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The Art Of Distortion

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1          Correct lens distortion

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2          Remove or reduce panoramic stitch distortions

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3          Modify proportion globally including the aspect ratio of the frame

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4          Modify proportion locally within the frame

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5          Change proximity

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6          Enhance gesture

 

We accept the distortions angle of view and lens choice create without a second thought, yet rarely do we give a second thought to the possibilities of expressively distorting our photographs during post-processing. The dazzling array of new tools at our disposal begs us to reconsider this. You need to know what’s possible, whether your goal is to correct the distortions introduced by the tools you use or to aesthetically refine or expressively enhance your images, a little or a lot, or to simply know what other photographers have done so that you can understand their creations better. Learn to see with new eyes, and a vast new horizon of possibilities will reveal itself to you.

Awareness of the distortions produced by an angle of view and lens choice is the beginning of using them creatively. Curiously, permission is the beginning of using distortion in post-processing creatively. Many people have been told that it’s inappropriate to do so. Why? Why accept an unintended mechanical bi-product but not a consciously intended effect? Why take such a powerful tool for expression off the table? While you can, you don’t have to distort your images to the point that they look like they’re being seen in a funhouse hall of mirrors. Even the subtlest applications of distortion can produce powerful results. Once you understand what kinds of distortions are possible in post-processing, you’ll frequently find yourself changing your angle of view or repositioning yourself during exposure.

6 Strategies For Using Distortion In Images

Here’s a short list of six strategies you can use when considering distorting your images creatively.

1          Correct lens distortion; straighten a horizontal or vertical while correcting barrel or pin cushion distortion.
2          Remove or reduce panoramic stitch distortions; undistort edges or smooth out uneven horizontals or verticals.
3          Modify proportion globally, including the frame; make images more or less horizontal or vertical or even turn one into another.
4          Modify proportion locally within the frame; adjust the height and width of both objects and areas.
5          Change proximity; push together or pull apart items.
6          Enhance or change gesture; make a leaning object more tilted or straighten it out.

Photoshop's 11 Weapons Of Mass Distortion


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