Red-eye reduction in C# using the csXImage control.
The "Red-Eye" effect spoils many otherwise perfect photos. Even though digital cameras usually have a flash setting that prevents red-eye, how often do we forget to select that option?
Removing the red glare from the eye is very simple in applications that use csXImage. The method is demonstrated in the C# demo program supplied in the csXImage download.
The photo is corrected in two steps.
(1) A region around the eye, usually an ellipse or a circle, is selected. This requires just one line of code.
axImageBox1.MouseSelectEllipse();
(2) After the user completes the selection using the mouse, two further lines of code adjust the red intensity for pixels where it is the dominant colour.
axImageBox1.UseSelection = true;
axImageBox1.ReduceRedEye();
The result is shown below.
Original photo
Selecting the red-eye
The final result
- Introduction - Introduction to the C# demo application.
- Simple Effects - Examples of using the Brightness and Sharpen methods.
- Image Merging - Using the MergeFile method for stamping or watermarking images.
- Mouse Events - Reading pixel information as the mouse is moved over the image.