Examples with EdgeSegment boofcv.alg.feature.detect.edge.EdgeSegment used on opensource projects

Example 1 with EdgeSegment

use of boofcv.alg.feature.detect.edge.EdgeSegment in project BoofCV by lessthanoptimal.

the class VisualizeImageData method drawEdgeContours.

/**
 * Draws each contour using a unique color.  Each segment of each edge is drawn using the same colors.
 *
 * @param contours List of edge contours
 * @param colors RGB color for each edge
 * @param output Where the output is written to
 * @param storage Optional working buffer for Bitmap image. Can be null.
 */
public static void drawEdgeContours(List<EdgeContour> contours, int[] colors, Bitmap output, byte[] storage) {
    if (output.getConfig() != Bitmap.Config.ARGB_8888)
        throw new IllegalArgumentException("Only ARGB_8888 is supported");
    if (storage == null)
        storage = declareStorage(output, null);
    else
        Arrays.fill(storage, (byte) 0);
    for (int i = 0; i < contours.size(); i++) {
        EdgeContour e = contours.get(i);
        int c = colors[i];
        for (int j = 0; j < e.segments.size(); j++) {
            EdgeSegment s = e.segments.get(j);
            for (int k = 0; k < s.points.size(); k++) {
                Point2D_I32 p = s.points.get(k);
                int index = p.y * 4 * output.getWidth() + p.x * 4;
                storage[index++] = (byte) (c >> 16);
                storage[index++] = (byte) (c >> 8);
                storage[index++] = (byte) c;
                storage[index] = (byte) 0xFF;
            }
        }
    }
    output.copyPixelsFromBuffer(ByteBuffer.wrap(storage));
}

Example 2 with EdgeSegment

use of boofcv.alg.feature.detect.edge.EdgeSegment in project BoofCV by lessthanoptimal.

the class VisualizeImageData method drawEdgeContours.

/**
 * Draws each contour using a single color.
 *
 * @param contours List of edge contours
 * @param color The RGB color that each edge pixel should be drawn
 * @param output Where the output is written to
 * @param storage Optional working buffer for Bitmap image. Can be null.
 */
public static void drawEdgeContours(List<EdgeContour> contours, int color, Bitmap output, byte[] storage) {
    if (output.getConfig() != Bitmap.Config.ARGB_8888)
        throw new IllegalArgumentException("Only ARGB_8888 is supported");
    if (storage == null)
        storage = declareStorage(output, null);
    else
        Arrays.fill(storage, (byte) 0);
    byte r = (byte) ((color >> 16) & 0xFF);
    byte g = (byte) ((color >> 8) & 0xFF);
    byte b = (byte) (color);
    for (int i = 0; i < contours.size(); i++) {
        EdgeContour e = contours.get(i);
        for (int j = 0; j < e.segments.size(); j++) {
            EdgeSegment s = e.segments.get(j);
            for (int k = 0; k < s.points.size(); k++) {
                Point2D_I32 p = s.points.get(k);
                int index = p.y * 4 * output.getWidth() + p.x * 4;
                storage[index++] = b;
                storage[index++] = g;
                storage[index++] = r;
                storage[index] = (byte) 0xFF;
            }
        }
    }
    output.copyPixelsFromBuffer(ByteBuffer.wrap(storage));
}

Example 3 with EdgeSegment

use of boofcv.alg.feature.detect.edge.EdgeSegment in project BoofCV by lessthanoptimal.

the class ExampleFitPolygon method fitCannyEdges.

/**
 * Fits a sequence of line-segments into a sequence of points found using the Canny edge detector.  In this case
 * the points are not connected in a loop. The canny detector produces a more complex tree and the fitted
 * points can be a bit noisy compared to the others.
 */
public static void fitCannyEdges(GrayF32 input) {
    BufferedImage displayImage = new BufferedImage(input.width, input.height, BufferedImage.TYPE_INT_RGB);
    // Finds edges inside the image
    CannyEdge<GrayF32, GrayF32> canny = FactoryEdgeDetectors.canny(2, true, true, GrayF32.class, GrayF32.class);
    canny.process(input, 0.1f, 0.3f, null);
    List<EdgeContour> contours = canny.getContours();
    Graphics2D g2 = displayImage.createGraphics();
    g2.setStroke(new BasicStroke(2));
    // used to select colors for each line
    Random rand = new Random(234);
    for (EdgeContour e : contours) {
        g2.setColor(new Color(rand.nextInt()));
        for (EdgeSegment s : e.segments) {
            // fit line segments to the point sequence.  Note that loop is false
            List<PointIndex_I32> vertexes = ShapeFittingOps.fitPolygon(s.points, false, minSide, cornerPenalty);
            VisualizeShapes.drawPolygon(vertexes, false, g2);
        }
    }
    gui.addImage(displayImage, "Canny Trace");
}

Example 4 with EdgeSegment

use of boofcv.alg.feature.detect.edge.EdgeSegment in project BoofCV by lessthanoptimal.

the class VisualizeBinaryData method renderContours.

public static BufferedImage renderContours(List<EdgeContour> edges, int[] colors, int width, int height, BufferedImage out) {
    if (out == null) {
        out = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    } else {
        Graphics2D g2 = out.createGraphics();
        g2.setColor(Color.BLACK);
        g2.fillRect(0, 0, width, height);
    }
    colors = checkColors(colors, edges.size());
    for (int i = 0; i < edges.size(); i++) {
        EdgeContour e = edges.get(i);
        int color = colors[i];
        for (EdgeSegment s : e.segments) {
            for (Point2D_I32 p : s.points) {
                out.setRGB(p.x, p.y, color);
            }
        }
    }
    return out;
}