From 2bc0fd4219448fab9041dc13625a5ebffe6143cd Mon Sep 17 00:00:00 2001
From: brinn <brinn>
Date: Tue, 16 Aug 2011 07:48:34 +0000
Subject: [PATCH] add: method mixImages()
SVN: 22492
---
.../systemsx/cisd/common/image/MixColors.java | 59 ++++++++++++++++++-
1 file changed, 56 insertions(+), 3 deletions(-)
diff --git a/common/source/java/ch/systemsx/cisd/common/image/MixColors.java b/common/source/java/ch/systemsx/cisd/common/image/MixColors.java
index b6ae2c6c184..517c41fcd13 100644
--- a/common/source/java/ch/systemsx/cisd/common/image/MixColors.java
+++ b/common/source/java/ch/systemsx/cisd/common/image/MixColors.java
@@ -17,6 +17,7 @@
package ch.systemsx.cisd.common.image;
import java.awt.Color;
+import java.awt.image.BufferedImage;
/**
* A class for calculating a mixed color from a set of pure colors of different relative
@@ -30,7 +31,7 @@ public class MixColors
{
private static final int MAX_COMPONENT_VALUE = 255;
-
+
private static final float MAX_COMPONENT_VALUE_FLOAT = MAX_COMPONENT_VALUE;
private static int getMaxComponent(int r, int g, int b)
@@ -74,7 +75,7 @@ public class MixColors
private static Color getColor(float red, float green, float blue, int brightness)
{
final float max = getMaxComponent(red, green, blue);
- // Normalize the brightness.
+ // Normalize the brightness.
final float normFactor = Math.min(MAX_COMPONENT_VALUE_FLOAT, brightness) / max;
red *= normFactor;
green *= normFactor;
@@ -103,7 +104,7 @@ public class MixColors
private static Color getColor(int red, int green, int blue, int brightness)
{
final int max = getMaxComponent(red, green, blue);
- // Normalize the brightness.
+ // Normalize the brightness.
final float normFactor = Math.min(MAX_COMPONENT_VALUE_FLOAT, brightness) / max;
red = Math.round(red * normFactor);
green = Math.round(green * normFactor);
@@ -233,4 +234,56 @@ public class MixColors
return getColor(red, green, blue);
}
+ /**
+ * Calculate a new image by mixing the given gray-scale </var>images</var>.
+ *
+ * @param images The images to merge.
+ * @param quadratic If <code>true</code>, use a quadratic (weighted) additive color mixture,
+ * otherwise use a linear (unweighted) additive color mixture.
+ * @param saturationEnhancementFactor If > 0, perform a saturation enhancement step with the
+ * given factor.
+ * @return Returns the mixed image.
+ */
+ public static BufferedImage mixImages(BufferedImage[] images, Color[] colors,
+ boolean quadratic, float saturationEnhancementFactor)
+ {
+ for (int i = 0; i < images.length; ++i)
+ {
+ if (images[i].getColorModel().getNumColorComponents() != 1
+ || images[i].getColorModel().getComponentSize(0) != 8)
+ {
+ throw new IllegalArgumentException(
+ "mixImages() only works on 8-bit gray scale images.");
+ }
+ }
+ final BufferedImage mixed =
+ new BufferedImage(images[0].getWidth(), images[0].getHeight(),
+ BufferedImage.TYPE_INT_RGB);
+ for (int x = 0; x < images[0].getWidth(); ++x)
+ {
+ for (int y = 0; y < images[0].getHeight(); ++y)
+ {
+ final float[] intensities = new float[images.length];
+ for (int i = 0; i < images.length; ++i)
+ {
+ intensities[i] = images[i].getRaster().getSampleFloat(x, y, 0) / 255f;
+ }
+ Color mixColor =
+ quadratic ? calcMixedColorQuadratic(colors, intensities)
+ : calcMixedColorLinear(colors, intensities);
+ if (saturationEnhancementFactor > 0f)
+ {
+ final float[] hsb =
+ Color.RGBtoHSB(mixColor.getRed(), mixColor.getGreen(),
+ mixColor.getBlue(), null);
+ mixColor =
+ Color.getHSBColor(hsb[0],
+ Math.min(1f, saturationEnhancementFactor * hsb[1]), hsb[2]);
+ }
+ mixed.setRGB(x, y, mixColor.getRGB());
+ }
+ }
+ return mixed;
+ }
+
}
--
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