| Brightness Effect | ||
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The Brightness effect can be used to lighten the image or to darken it.
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Settings
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Workings
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The value given is added to every pixel in the image. The value may be negative in which case the result is to darken rather than lighten the image.
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Example
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The following show the effect of brightening or darkening an image.
void function() {
using (Doc doc = new Doc()) {
AddImagePage(doc, img2); // original image
doc.Rendering.Save("EffectBrightness.jpg");
using (ImageLayer layer = AddImagePage(doc, img2)) {
using (EffectOperation effect = new EffectOperation("Brightness")) {
effect.Parameters["Amount"].Value = 20;
effect.Apply(layer.PixMap);
}
}
doc.Rendering.Save("EffectBrightness20.jpg");
using (ImageLayer layer = AddImagePage(doc, img2)) {
using (EffectOperation effect = new EffectOperation("Brightness")) {
effect.Parameters["Amount"].Value = -20;
effect.Apply(layer.PixMap);
}
}
doc.Rendering.Save("EffectBrightness-20.jpg");
using (ImageLayer layer = AddImagePage(doc, img2)) {
using (EffectOperation effect = new EffectOperation("Brightness")) {
effect.Parameters["Amount"].Value = 60;
effect.Apply(layer.PixMap);
}
}
doc.Rendering.Save("EffectBrightness60.jpg");
}
}
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