Exposure Correction in Picasa

Although PhotoFiltre gives me more control over exposure control, Picasa will often do the same job with just one button. Double-click your photo to access the editing mode and click on the "I'm Feeling Lucky" button. Picasa will then do its best guess at correcting your exposure, contrast and colour balance all in one go. And generally it does a good job as you can see here.


But sometimes I don't like the colour correction. It just seems to be a little too much - too much contrast, too much colour saturation, too much colour shift. In Picasa once you've made a correction, all you have to do is use the Undo button to reverse the last corrections. So if the "I'm Feeling Lucky" button isn't lucky for you, Undo it and then try the "Auto Contrast" and the "Auto Colour" buttons. 'Auto Contrast' adjusts the contrast without touching the colour balance. "Auto Colour" takes a best guess at the lighting and adjusts it so that whites come out as whites rather than pale yellows, oranges, blues or greens.