1 files changed, 53 insertions, 0 deletions
diff --git a/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIGrayscaleImage.java b/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIGrayscaleImage.java
new file mode 100644
index 0000000..facbb09
--- /dev/null
+++ b/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIGrayscaleImage.java
@@ -0,0 +1,53 @@
+/*
+ * To change this template, choose Tools | Templates
+ * getAnd open the template in the editor.
+ */
+package edu.wpi.first.wpijavacv;
+
+import static com.googlecode.javacv.cpp.opencv_core.*;
+import static com.googlecode.javacv.cpp.opencv_imgproc.*;
+
+/**
+ * A grayscale image
+ * 
+ * @author Greg Granito
+ */
+public class WPIGrayscaleImage extends WPIImage {
+
+    WPIGrayscaleImage(IplImage imageSrc) {
+        super(imageSrc);
+    }
+
+    /**
+     * Returns a black and white image where every pixel that is higher (in the 0-255 scale) than the given threshold is <bold>white</bold>,
+     * and everything below is <bold>black</bold>.
+     * @param threshold a value 0-255. if a pixel has a value below the theshold, it becomes black
+     * if the pixel value is above or equal to the threshold, the pixel becomes white
+     * @return a new {@link WPIBinaryImage} that represents the threshold
+     */
+    public WPIBinaryImage getThreshold(int threshold) {
+        validateDisposed();
+
+        IplImage bin = IplImage.create(image.cvSize(), 8, 1);
+        cvThreshold(image, bin, threshold, 255, CV_THRESH_BINARY);
+        return new WPIBinaryImage(bin);
+    }
+
+    /**
+     * Returns a black and white image where every pixel that is higher (in the 0-255 scale) than the given threshold is <bold>black</bold>,
+     * and everything below is <bold>white</bold>.
+     *
+     * In other words, this will return the inverted image of {@link WpiGrayscaleImage#getThreshold(int) getThreshold(...)} but is
+     * more efficient than calling {@link WpiGrayscaleImage#getThreshold(int) getThreshold(...)}.{@link WPIBinaryImage#getInverse() getInverse()}
+     * @param threshold a value 0-255. if a pixel has a value below the theshold, it becomes black
+     * if the pixel value is above or equal to the threshold, the pixel becomes white
+     * @return a new {@link WPIBinaryImage} that represents the threshold
+     */
+    public WPIBinaryImage getThresholdInverted(int threshold) {
+        validateDisposed();
+
+        IplImage bin = IplImage.create(image.cvSize(), 8, 1);
+        cvThreshold(image, bin, threshold, 255, CV_THRESH_BINARY_INV);
+        return new WPIBinaryImage(bin);
+    }
+}