HarrisLaplaceApp.scala

package app
import ij.ImagePlus
import imagescience.image.Image
import harrislaplace.HarrisLaplace
import imagescience.shape.Point
import ij.process.ImageProcessor
import scalaj.collection.Imports._

object HarrisLaplaceApp extends App {

  val img = Image.wrap(new ImagePlus("3.pgm"))

  val imgproc = img.imageplus.getProcessor

  val pixels = imgproc.getPixels.asInstanceOf[Array[Byte]]
  
  println(pixels.size)

  val px = new Array[Array[Int]](imgproc.getWidth)

  for (i <- 0 until imgproc.getWidth) {
    px(i) = new Array[Int](imgproc.getHeight)
    for (j <- 0 until imgproc.getHeight)
      px(i)(j) = pixels(imgproc.getWidth() * i + j)
  }

  val harrislaplace = new HarrisLaplace

  val points = harrislaplace.detect(px, imgproc.getWidth, imgproc.getHeight)

  val dup = imgproc.duplicate

  points.foreach(p => drawPoint(dup, p))

  new ImagePlus("", dup).show()

  def drawPoint(ip: ImageProcessor, point: Point) {
    ip.drawLine(point.x.toInt - 2, point.y.toInt, point.x.toInt + 2, point.y.toInt)
    ip.drawLine(point.x.toInt, point.y.toInt - 2, point.x.toInt, point.y.toInt + 2)
  }
}