I am using the Marvin Image Processing Framework in Java and I am struggling to scale the image. It's just making a black square, can you see what I have done wrong? The set threshold is working.
package com.example.marvin;
import marvin.image.MarvinImage;
import marvin.io.MarvinImageIO;
import marvin.plugin.MarvinImagePlugin;
import marvin.util.MarvinPluginLoader;
public class Imageprocess {
public static void main (String[] args) {
MarvinImage image = MarvinImageIO
.loadImage("/Users/unknown1/Desktop/images.jpeg");
MarvinImagePlugin thresholdplugin = MarvinPluginLoader
.loadImagePlugin("org.marvinproject.image.color.thresholding.jar");
MarvinImagePlugin scaleplugin = MarvinPluginLoader
.loadImagePlugin("org.marvinproject.image.transform.scale.jar");
thresholdplugin.setAttribute("threshold", 85);
thresholdplugin.process(image, image);
scaleplugin.setAttribute("newWidth", 50);
scaleplugin.setAttribute("newHeight", 37);
scaleplugin.process(image, image);
image.update();
MarvinImageIO.saveImage(image, "/Users/unknown1/Desktop/images1.jpeg");
}
}
It works using the latest version of Marvin!
import marvin.image.MarvinImage;
import marvin.io.MarvinImageIO;
import static marvin.MarvinPluginCollection.*;
public class Imageprocess {
public static void main (String[] args) {
MarvinImage image = MarvinImageIO.loadImage("./res/chamaleon.jpg");
thresholding(image, 85);
scale(image.clone(), image, 50, 37);
MarvinImageIO.saveImage(image, "./res/chamaleon_scaled.jpg");
}
}
you need to do image.update();
after each process
and then you get the following code:
...
thresholdplugin.setAttribute("threshold", 85);
thresholdplugin.process(image, image);
image.update();
scaleplugin.setAttribute("newWidth", 50);
scaleplugin.setAttribute("newHeight", 37);
scaleplugin.process(image, image);
image.update();
...
and of course, it's better to use the latest version of the plugin
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