The experiment is designed to understand and learn image arithmetic concepts. It demonstrates five operations:

1. Image addition
2. Image subtraction
3. Image difference
4. Image multiplication
5. Image division

Steps to run the simulation

1. Click Select Image and drag over the mosaic to choose a region.

   • On small screens, use a drag or touch-drag gesture directly on the mosaic image.
   • The selected region appears in the Input Image panel.

2. Choose one of the images in the Second Operand Picker.

   • Dull image gives a darker operand.
   • Bright image gives a brighter operand.
   • Gradient image gives a smooth intensity ramp.
   • Mosaic crop preview uses the selected crop as the second operand.

3. Select an operation from Addition, Subtraction, Difference, Multiplication, or Division.

4. Select a mapping from Normal, Clipping, or Auto-Scaling.

   • Normal shows the raw arithmetic result in display form.
   • Clipping limits values to the display range.
   • Auto-Scaling remaps the result to use the full intensity range.

5. Click Run to perform the operation.

   • The result is displayed in the Output Image panel.
   • The status bar shows the current step or any validation message.

6. Click Reset to clear the selected crop and restore the default picker, operation, and mapping.

What to expect

1. The input panel updates immediately after a valid mosaic selection.
2. The output panel updates only after you click Run.
3. The selected second operand changes the output image.
4. Different operation and mapping choices should produce visibly different results.

Interesting observations

1. Compare subtraction and difference to see how absolute difference avoids negative intensities.
2. Compare multiplication with clipping and auto-scaling to see how mapping changes the output.