Add low-pass and high-pass filtering

src/main/java/ui/abstractions/IMainView.java

@@ -0,0 +1,11 @@
+package ui.abstractions;
+
+import domain.common.Mode;
+import domain.image.Image;
+
+public interface IMainView {
+
+    void changeMode(Mode m);
+    void displayImage(Image image);
+
+}