Image Arithmetic

 zom.jpg  -  232x132 - 7.8k                                  fishbowl.jpg  165x134 - 9k

Once again, here are the original images.

    Addition

232x132 - 7.8k

ADD: Divisor=3, Bias=2
This is the first attempt without additional editing.

zom_fish.jpg

232x132 - 9.6k

COLOR CORRECTED
Colors/Adjust/Brightness&Contrast/
B=10, C=30
Colors/Adjust/HSL/H=3, S=50, L=-5

intrigued.jpg

232x132 - 11.5k

POSTERIZED
Colors/Posterize/2 bits per channel
The image of Zom now takes on an almost ‘illustrated’ quality, like the fishbowl art. Note: It seems better to apply any special effects to an
image before reducing the file. Work large, then resample.

i_post.jpg

232x132 - 12k

HOT WAXED
Image/Special Effects/Hot Wax
I added hot wax to the color corrected image to get a really cool stained glass effect. Each additional operation increases the size of the file slightly. It’s unfortunate that I had to reduce the originals, losing some great detail. At 200% enlargement it’s a much better experience.. especially this one.

i_hotwax.jpg

    Subtraction

165x134 - 6k

SUBTRACTED
Image/Arithmetic/Subtract/ Divisor=2, Bias=2
In this case, I reversed the order of arithmetic. I placed the fishbowl image in the “image 1” position and the cat image in #2 position.  This operation made the #2 image (the cat image) negative but kept the fish positive. Note: The image that is in the #1 position is the one that will determine the dimensional size of the combined images.

zomfish4.jpg

165x134 - 9.5k

COLOR CORRECTED
I took the subtracted image and performed the follow steps to get the best detail possible:
Colors/Adjust/Hue, Saturation, Luminance/ H=0, S=90, L=90
Colors/Adjust/Gamma Correction @ 2.25
Note: I could have gotten a lighter initial image (above) by using a Divisor of 1, however this would burn out too much of the detail. Better to start darker and correct from there.

subtract.jpg

232x132 - 10.6k

SUBTRACTED
Image/Arithmetic/Subtract/ Divisor=1, Bias=2
Here I went back to the original order with the cat pic in the #1 position and again, subtraction made a negative of the #2 image (this time the fishbowl). Since my images were not of equal dimensions, I preferred this order to keep the cat from distorting but to allow the fishbowl and fish to distort in an interesting way that actually improved the composition. (imho)

subtract2.jpg

    Multiply

232x132 - 10k

MULTIPLIED
Image/Arithmetic/Multiply/Divisor=240, Bias=0
This setting seemed to get the best result. I’m not sure I understand the full concept of multiplying the imagags. Does anyone have an easy-to-understand explanation? One thing I did note: this function provided the absolute best quality of detail by far without further editing.

multiply.jpg

    Divide

232x132 - 12k

DIVIDED
Image/Arithmetic/Divide/Divisor=1, Bias=2
This has to be the weirdest. Dividing seems to make parts of each image negative.

divide.jpg

165x134 - 10k

DIVIDED
Image/Arithmetic/Divide/Divisor=1, Bias=2
All I did here was reverse the order of the images again:
fishbowl.jpg / zom.jpg = divide.jpg
Since fishbowl.jpg was first, that became the predominant size.

divide2.jpg

    Lightest

232x132 - 8.6k

Lightest
Image/Arithmetic/Lightest/Divisor=1, Bias=0
This shows the lightest operation taking the lightest pixel from image 1 or 2.

lightest.jpg

232x132 - 8.6k

Lightest
Image/Arithmetic/Lightest/Divisor=2, Bias=0
This shows the lightest operation taking the lightest pixel from image 1 or 2.
Same operation as above, different divisor. I’ll have to try different images with this one.. to see if I can come up with anything better than this.

light2.jpg

    Darkest

232x132 - 10k

Darkest
Image/Arithmetic/Darkest/Divisor=1, Bias=0
This shows the darkest operation taking the darkest pixel from image 1 or 2.

darkest.jpg

 That concludes the Image Arithmetic for Lesson 3. FOLLOW ZOM’s PAWS to review the remaining exersizes..

I refuse to follow a cat. Take me back to the PSP main page, PSP LESSONS.