Combining Images

Tutorial

Click on thumbnailed images to enlarge

Okay, first you open the two images you want to combine.

I'll be using these two.
User posted image

Choose IMAGE > ARITHMETIC User posted image

Choose an image for Image #1 (from drop-down list) and choose an image for Image #2 from the drop down list.
User posted image

From the Function group box, select a method for combining the images.

Add - Image 1 Value + Image 2 Value
Subtract - Image 1 Value - Image 2 Value
Multiply - Image 1 Value x Image 2 Value
Difference - Absolute Value of (Image 1 Value - Image 2 Value)
Lightest - Maximum of (Image 1 Value, Image 2 Value)
Darkest - Minimum of (Image 1 Value, Image 2 Value)
Average (Image 1 value + Image 2 Value)/2
OR Binary Or
ANDBinary And
XOR Binary And/Or

I'm gonna choose Average

Next, from the Channel group box, select the color channel from each image to use for combination. Mark ALL CHANNELS checkbox to use all the color channels in both images. This will make a 24-bit image.

So, I'm going to mark 'All Channels' because I want it in full color.

You can leave the rest as it is for now, then press OK.

Here's the final result!
User posted image