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Most Photoshop users have seen LAB as one of the choices offered under the Image->Mode menu. Many know that LAB is the “connection space” used in ICC profile conversions. Most are at least aware that LAB is a device-independent color space. What is LAB good for?...
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No matter how good your custom profiles are, at the end of the day the difference between a mediocre image and a great image often depends on your ability to interpret the color and tone of the original scene. There are many flawed images that are worth rescuing – this 37 page step-by-step tutorial looks at a number of trick techniques for dealing with exposure, saturation and color casts including:
• LAB curve correction basics • Removing color casts • Apply Image command • Saturation control in LAB
The tutorial begins with an exploration of LAB and some basic observations of curve edits in LAB. It proceeds to some common uses and finally, ends up with a fairly sophisticated correction that simulates the use of flash fill in a contrasty lighting situation. As an additional bonus, the final image project shown above details a method of simulating a limited depth of field by bluring the background – there's a trick to doing this correctly so that you can't detect the application of Gaussian blur at the edges of the figure!
A 5.2 meg sample files archive for the tutorial can be downloaded from within the PDF file.
37 page PDF - 3.6 megs download -
Special Downloading Note: You must click this link to get to the "Download" page. This page gives you the link to download the file – you can bookmark the page to return to it later but it is best to click the download link and download the file right away. There are instructions on the download page for saving the PDF to your hard drive and a link for Windows users to get "Stuffit Expander" to decompress sample files.