E.L.. Shapiro Loc: Ottawa, Ontario Canada

Many photograher on this site tend to "look for trouble" where it hardly exists. Diffraction, noise, pixelation, lens aberrations, and more! It's like fols reading oneof those"home medical advisor" books and then developing all the symptoms!

So...I blew up a section of your manage- no issues. You can bak a life-size print of your cat or larger with no problems.

The image seems a bit dark on my monistic- there's much more shadow detail in the file. Perhas you lkie the darker effect- more spooky?

Lovely cat- cool shot!

Meet Zack, our "Tuxedo cat"- he's into cameras!

photophile Loc: Lakewood, Ohio, USA

I enjoyed your cat images.

geajr

My Mitch!

(Download)

E.L.. Shapiro Loc: Ottawa, Ontario Canada

Cat and Dogs!

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

Wow! Excellent art and a stunning feline shot

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

A handsome, dapper looking gentleman in a great feline portrait

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

Super

geajr

Thank you! He knows only to well how handsome he is!

Blu1Dog Loc: Florida

Wonderful shot... in my opinion you may be being too critical of a beautiful photo. Loving tuxedo cats myself, I wish I had made some pictures of my Sylvestor.

geajr

Thank you so much, he is all that and knows it!!! Mitch and Mookie

(Download)

Fotoartist Loc: Detroit, Michigan

Sharp stuff.

geajr

I wish that i could make pictures of my cats like this.

Thomas902 Loc: Washington DC

Thank you for your eloquent dissertation JimH123...
I had almost forgotten about "The Demosaicing Process i.e. an algorithm used to reconstruct a full color image from the incomplete color samples output from an image sensor overlaid with a color filter array (CFA). A.K.A. CFA interpolation... Takes me back to my days in Civil Engineering land surveying with high precision "Theodolites"... where optical readings once taken were "closed" to complete a "best fit" of the land area measured... doing this math with hand calculators was a epic challenge... lol That said, the process is still pretty much the same albeit the vast quality of data points are mind boggling...

It's always so funny watching folks get worked up over imagery that is at best only an approximation of what was optically present on the sensor... kind of a "dream within a dream" what is perceived as real is only a "best fit" of data points which may or may not represent reality... kind of like the Cheshire Cat in Alice and Wonderland... "You may have noticed that I'm not all there myself.” Great description of CFA interpolation... the Cheshire Cat got it right!

Again many thanks JimH123 it's good to know that there are folks here on UHH who are playing with a full deck... :)

All the best on your journey...

JimH123 Loc: Morgan Hill, CA

Thank you Thomas for noticing what I was making a point of. Many (or most) people don't really understand demosaicing (sometimes called debayering). But it is really important. And it definitely removes detail. I have a camera modified with the CFA removed meaning that it only does mono, and also, no demosaicing, which equals very noticeable detail improvement. Actually, it amazing that the images can turn out as good as they do considering what they start with.

Not having the RAW for the cat picture with the whiskers, I decided to just pick another image and show what demosaicing has to do.

Image 1: Let's start with the original RAW image.

Image 2: A heavy crop of the left size of the rose to show an area to look at.

Image 3: Using RawTherapee, I took a look at the same portion of the rose with no demosaicing. We are now looking at the individual Red, Green and Blue pixels from the sensor. From these Red, Green and Blue pixels, a red, a green and a blue value has to be determined from each pixel that we see. If I pick any pixel, perhaps a blue, then it needs a green value and a red value for the complete value for the demosaiced image. And to get those values, some algorithm has to be followed to allow some certain number surrounding green pixels to be averaged for a green value, and the same process for a red value using surrounding red pixel values. And this process is repeated for every one of the pixels. Whatever the number of pixels the sensor has, be it 24M or 62M or whatever, all these calculations have to be made. Gives one an appreciation of just how fast the processor is in a camera to produce an on-the-fly JPEG and to do this with some number of shots per second.

Image 4: Back to the original RAW crop and showing a crop of the detail that can be gotten from the original using Sharpen AI.

Still blows my mind at just how well the demosaicing process really is. Yet we know that it is not an exact science which is why there are so many variations of this process. And yet, it produces this detail. Although if you were to see this with a mono sensor, the detail would be even better.

Note: I cropped the closeups so tightly that the download button wasn't even offered.

Original

(Download)

tight crop of left side of rose


A look at the original with RAW Tharapee - this is what recorded on the sensor

(Download)

Crop of a sharpened image using Sharpen AI

Jrwil

We seem to have the same cats! Clever beasts.