Exposure Correction
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This dialog corrects exposure problems in a picture. You will be surprised at the positive effects the following 4 tabs can have on many of your photographs:

Auto

Performs automatic contrast adjustment. The contrast is adjusted automatically by stretching the histogram between the minimum and the maximum optimized values. The Stretch All Channels option is provided in case you want to stretch each color channel separately.

Example of Auto Contrast:  
 
fs_01   fs_02     
Before
After
 


Brightness

Performs 3 adjustments on Brightness, Contrast and Gamma. All 3 RGB channels are changed at same time with these operations.

Brightness
Brightness is a linear function applied to the histogram range. Increasing or Decreasing brightness will affect all values in the histogram of the picture by the same amount. So dark and bright pixels will result brighter or darker by the same amount.

Contrast
Contrast is also a linear function applied to the histogram range. Increasing or Decreasing the Contrast will modify differently dark and bright pixels. Increasing Contrast, dark pixels will become more dark and bright ones will become even brighter.

You can use the Un-linear contrast option to decrease the contrast, without loosing color information in the picture. To Adjust Brightness and Contrast more precisely you should use the Levels Tab, where it's possible to modify separately at the same time Shadows, Midtones and Hilights.

Gamma
Gamma correction is a non-linear correction that is based on an exponential formula. A Gamma curve represents the way usual monitors reproduce and display RGB values. This monitor conversion is necessary since the human eye has a nonlinear response curve, in fact it is more sensitive to variations in low light than to an equal variation in bright light.

Applying a Gamma correction curve can thus simulate the effect of viewing a picture on a brighter or darker monitor.

Example of correcting Brightness, Contrast, Gamma  
 
fs_03   fs_04     
Before
After
 


Levels Tab

In the Levels Tab it's possible to regulate the Exposure, even for each RGB channel separately, by changing the amount of Shadows
, Midtones and Hilights.

See the Histogram & Curves topic for more information.


Smart Flash

Sometimes, there are parts of the picture which are under-exposed and need to be corrected. To recover details in these dark regions, it's not useful to use one of the more common regulations, because we will risk to over-expose the part of the picture that doesn't need any correction.

In order to solve this problem, we invented a smart algorithm, which affects only parts of the picture that need to be brought to light. You can regulate the amount to be applied on the picture by simply using a slider.

The algorithm is especially effective in some situations that will always happen, no matter how good a camera you have:
 
·where there's strong sunlight shining into small streets (as seen in the example below)  
·when you take indoor pictures without a flash, and the light through the window is very bright  
·when you photographed someone against the sunlight  

Example of Smart Flash  
 
fs_07    fs_08     
Before
After
 


icon_tipImportant
 
·Remember, that correction tools permanently change the appearance of a photograph, and that some of the original information of the picture may be lost. While the algorithms in CodedColor are not as aggressive as in many competing programs, always make sure that it's not your monitor that is causing the apparent flaw. That way, you would actually ruin an image because of a badly adjusted monitor. If in doubt, it's a good habit to keep your original pictures in a backup folder.  
 
·If you only want to apply Exposure corrections to certain parts of an image, you can create Selections or use the Retouch Brushes.  
 
·When selecting parts of the image using the selection tools, all brushes and correction dialogs only apply to these selections. Selections can also have a feather, reducing the effect of the brush or correction close to the selection borders.  

icon_tipRelated topics
 
·A short introduction to Histograms  
·Before/After Tutorials  



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CodedColor PhotoStudio by 1STEIN is a Windows photo viewer and editor to organize, edit, resize, reformat, correct, compare, sort, watermark, annotate and print digital images, and to edit EXIF and IPTC data in digital photos. You can rename multiple images, remove scratches, create panorama pictures (stitch), convert RAW photos (from Canon, Nikon, Olympus, etc. cameras), send images via Skype, send photo SMS, burn digital watermarks, correct colors, run a screenshow, convert and correct JPEG images in a batch process, rename fields, open pictures and image folders from the Explorer, generate a webalbum in HTML and compress JPG images. The CodedColor full version is not free, but during registration you can choose the Freeware edition, in which some functions are deactivated. After the download you can try the PhotoStudio shareware for 30 days without any restrictions. The CodedColor software interface looks very similar to ACDSee, is easier to use than Photoshop and more versatile than Picasa and Irfanview, but still contains editing and correction features as effective as Paintshop. Have a look at our Before / After tutorials, in order to get an idea of the powerful editor capabilities. The software comes with a detailed handbook and a fast database to store EXIF / IPTC data and color informationen. CodedColor PhotoStudio is a powerful and versatile photo organizer and image editing software for digital camera users. The user friendly interface includes features like photo editing & printing, web & flash album galleries, slide shows, photo management & cataloging, custom sorting, IPTC & EXIF editor and display, GPS tagging, perspective correction, barrel distortion, effects, thumbnail generation, resize & resample images, jp2000, batch conversion, database keyword searching, red eye removal, color / sharpness / brightness & contrast correction, artefacts removal, clone brush, scanner & TWAIN import, screen capture, lossless JPEG rotation, transparency (alpha channel), gamma correction, print ordering and screenshows with many transition effects, watermark text, image annotations, panorama stitch & animation, video capture, PDF album export, photo layouts, collages, frames, shadows, histograms, automatic white balance, skype photo sharing, etc. Opens and converts all common image formats: BMP, WMF, GIF, JPEG, JPEG2000, TIFF, PCX, PNG, PSP, PSD, PCD, and all current RAW formats. Visit the CodedColor FotoStudio homepage to learn more and download a free copy! Includes BYNGO MMS messenger and CodedColor Publisher, a versatile photo layout and DTP tool, from which you can order individual photobooks through KODAK.