Red-eye reduction in VB.NET 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 VB.NET 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 VB.NET 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.