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The Eye Dropper tool The Eye Dropper is an essential Photoshop tool, especially for achieving colour accuracy
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Eye Dropper info You can also use the Histogram with the Eye Dropper to read values and gauge the distribution of tones in an image.
he Eye Dropper tool samples the colours of individual pixels in an image, but there is more to it than just being able to set a new foreground colour. In Levels Adjustment, you can use the Eye Dropper by moving the cursor over the image, and reading the tonal values at different points. To see if the darkest shadows are really black and the lightest really white, hover the Eye Dropper over them and read their values in the Info palette. The palette can display various colour values – CMYK, RGB, LAB and so on. With RGB (Red, Green and Blue pixels)
Using the Eye Dropper tool while working with the Levels adjustment panel allows you to read the original and adjust values in the Info palette.
the darkest pixels should read 0,0,0. Pure white reads 255, 255, 255 – the maximum brightness value.
THE COLOUR SAMPLE TOOL Select a sampling method from the Options bar. Choose to take a point sample, or measure the average colour within 3x3 or 5x5 pixels.
The Colour Sampler tool lets you place multiple sample points in an image, marked by ‘bull’s eyes’.
The colour values for each point are displayed in the Info palette.
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CMYK documents are destined for print and colour is critical in this type of medium. You can check what colour mode the document is in the title bar.
Using the Sampler you can look at the darkest an lightest points in an image simultaneously.
The Info palette displays colour values differently depending how you have it set up and what colour mode your image is in.
FOCUS GUIDE – ADOBE PHOTOSHOP TOOL TECHNIQUES
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