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In PhotoController, you can call ColorAdjust method to do some simple color adjustment.
This method accepts a Color value or a System.Drawing.Imaging.ColorMatrix value. There
is an article that explains how ColorMatrix works in CodeProject, which is well written and the article uses VB.NET. I won't spend too much time to rewrite anything about it, but I want to show the following figures to demonstrates the results by using PhotoController.
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| Source Image |
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Yellow Color Adjustment
Controller.ColorAdjust ( Color.Yellow ) |
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Green Color Adjustment
Controller.ColorAdjust ( Color.Green ) |
Besides the ColorAdjust method, PhotoControler also offers many Filters to do the color adjustment, including GrayScaleFilter, GreyFilter, InvertColorFilter, ContrastFilter, SepiaFilter, BlackWhiteFilter, GammaFilter, HSLAdjustFilter, and so on.
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| GrayScale Result Image by using GrayScaleFilter |
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Sepia Image
SepiaFilter.Level = 21
Sepia is a configurable filter, 21 is the default value, which will normally achieve the best effect. But since different image might have different result, you could do some slight adjustments to obtain your best result. |
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Black and White Image
This is the image processed by BlackWhiteFilter, with a Threshold is 162.
By default, BlackWhiteFilter.Threshold is 128. But still, some images might have different color collection, to obtain a better result, you might need a smaller or a larger threshold value. |
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Invert Image
This image is processed by using InvertColorFilter. If you need a more configurable effect, you might need SolarizeFilter, which simulates Solarization effect. The default value is zero, which will give you exactly the same result as InvertColorFilter; but in SolarizeFilter, you could adjust the level of solarization.
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Gamma Adjustment
GammaFilter.BlueGamma = 1.2
You can adjust RedGamma, GreenGamma, and BlueGamma in GammaFilter |
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See Also