The eyedropper tool in Photoshop allows a user to record and reuse colour values. If you want, for example, to recolour part of an image sky-blue, then simple find an image that has an appropriately coloured sky, sample it with the eyedropper, and reuse the recorded colour values whereever and whenever you need them. In this tutorial I'll show you how it works and provide a few tips and tricks that will make the eyedropper invalueable to your colour matching workflow.
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brightness, colour cast, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, levels command, luminance, midtones, Photographic, photoshop cs3, shadows, tint, video tutorial
A colour cast is when the colour of an image shifts towards a specific hue, say green, to give the whole image an unsightly green tint. The reasons behind this and the resulting cast can be as numerous as the tools available to fix it. For this reason we'll take a classic example and put things right both manually and automatically.
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brightness, camera raw, colour histogram, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, levels command, midtones, Photographic, photoshop cs3, RGB, shadows, video tutorial
Made popular by the Camera Raw plug-in that ships along with Photoshop, the color histogram contains all 3 RGB channel histograms inside one window, giving a visually pleasing reference to colour information, how the channels interact and where exactly they don't.
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brightness, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, levels command, luminance, luminance histogram, midtones, Photographic, photoshop cs3, shadows, video tutorial
Because the human eye doesn't see red, green and blue light equally we need a reliable way of representing the brightness of a pixel independent of colour. And so steps up the luminance histogram - the most accurate way of spotting clipped shadows and blown highlights threatening the very existence of your image!
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brightness, clipped highlights, clipped shadows, colour panel, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, levels command, luminance, midtones, Photographic, photoshop cs3, RGB, shadows, video tutorial
Photoshop produces red, green and blue histograms inside an RGB image, when it's done it puts the results into a composite version and displays it as the standard view. How that composite view is calculated decides how we see clipping inside our images - and as you'll bear witness, things aren't always what they seem!
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brightness, channels, CMYK, colour sampler tool, colour wheel, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, layer mask, levels command, midtones, neutral colours, opacity, Photographic, photoshop cs3, RGB, shadows, skin tones, swatches, video tutorial
With one foot inside the CMYK colour space but the other firmly rooted to RGB land we begin to harness the power of number-based skin tone adjustments using the colour sampler tool and the levels command. Altogether a more involved but highly rewarding way to work that's employed by studios and portrait professionals around the world.
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brightness, channels, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, levels command, midtones, neutral colours, opacity, Photographic, photoshop cs3, RGB, shadows, skin tones, swatches, video tutorial
Modifying skin tones can be a tricky task, thankfully within levels we have a number of fully-adjustable yet simple techniques that wield some great results. Some of these results depend on the user’s perception of what's right, or what's wrong, with the colour of the skin, other results are aided by a library of skin tone swatches that are prepared to work overtime to get you the results you demand.
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brightness, colour sampler tool, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, info panel, levels command, midtones, Photographic, photoshop cs3, shadows, threshold command, video tutorial
So we know what shadows and highlights are, and we also know a way of locating and using them in conjunction with the relevant eyedroppers - but surely there must be a more accurate way of finding the brightest and darkest pixels inside an image? Well I'm glad you asked, as with assistance from the threshold command, the colour sampler tool, the info palette and the eyedroppers we can achieve pinpoint accuracy in a modest amount of time.
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banding, brightness, channels, clipping, Commands / Tools, contrast, custom keyboard shortcuts, eyedropper tool, free, guide to levels, highlights, histogram, layer mask, levels command, masking, midtones, Photographic, photoshop cs3, posterize, posterize command, set black point, set grey point, set white point, shadows, video tutorial
The eyedropper tools inside levels have the ability of setting specific values for specific pixels which is ideal when adjusting shadows, midtones and highlights. In the honour of levels we'll look at the eyedroppers and the theory of posterization followed by a full blown creative party as we play with those aforementioned eyedroppers, avoid the party-pooper that lives by the name of colour banding, and perform a very special party trick by transforming the grey eyedropper into a colour replacement tool. Doesn't time fly when you're having fun!!
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brightness, channels, Commands / Tools, contrast, eyedropper tool, free, guide to levels, highlights, histogram, hue, levels command, midtones, neutral colours, neutralize, Photographic, photoshop cs3, saturation, shadows, video tutorial
The term 'neutral colours' will feature a lot in the latter stages of this video series, so it's important to form an understanding of what it means - and how it can help us keep our colours accurate and true. On the other hand, adding saturation is the act of taking the colours, or more accurately the hues of an image, and making them more vivid by raising the intensity level - which is yet another level to understand!
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