Auto levels
Basic automatic correction technique employed by scanning and image processing software. Usually, the process takes an Integrated reading of the image and attempts to adjust the image by targeting a neutral scale for all values.
Auto Levels will examine an image and locate the brightest and darkest points in it.
Auto levels
This is a very basic automatic correction technique employed by scanning and image processing software.
"Auto Levels is for amateurs," you say?
Not if you already got it right in-camera and can move onto the next image.
Ignore the "Auto Levels" command, it rarely give good results.
DON'T use the burn and dodge tools!
Instead, use any of the selection tools to select the area you want to burn or dodge and then do as above to lighten or darken that area.
This tool is basically an auto levels and auto color tint correction tool.
To improve visibility, you can also increase the image's contrast using "auto levels," or you can drag the black point slider of the levels tool to the right while holding the ALT key (in Photoshop).
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The procedure starts off by launching Levels. The options for Auto Levels are set by clicking on the Options button in the lower right hand corner of the palette (see Figure 1).
Figure 2: Auto Color Correction Options Dialog Box ...
If it resolves your problem or makes it "good enough" then you are done. If not, undo the change by selecting Edit / Undo Auto Levels )or CTRL + Z). With my picture, Auto Levels resulted in: Auto Adjusted Image.
With one click, auto color correction may well modify color and contrast to your liking. Similarly, the auto levels feature adjusts overall contrast and often affects color, too.
Now go to Image>Adjustment>Auto Levels
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If you like the look, save a copy of this image. If not, ...
‘Color balance' is set to ‘Auto levels,' which maps the darkest color to 0.0 intensity and the brightest to 0.95. The way I read it there is no clipping involved. Good.
effort, and (with most raw converters) you'll get visibly more resolution out of the GF1 than the E-P1 too. Incidentally you can process GF1 JPEGs so the skies look like Olympus JPEGs, but it's fiddly (increase blue and green saturation, auto levels, ...
 See also: Image, Photoshop, Auto, Color, Light
  
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