Dinosaur – 15

This week I’ve been playing with Chroma Key effects. ( If that is the wrong expression, I apologise!! ) To most of us we know this as green-screening, but my attempt this week was actually using a blue background because, in an earlier shot, I had something green that I wanted to retain in the final image – but I later dropped that idea, but stayed with the blue backdrop.

So this is how the dinosaur ended up in Epping Forest. First of all I photographed the animal against a blue background. The objective here is to get the background as evenly illuminated as possible. Not that I succeeded here, but I was able to rectify this later in Photoshop CC.

01-DINASOUR by John Allen

Then, using the ‘Select > Colour Range’ in Photoshop I selected all of the blue and using Select > Select and Mask ( again in Photoshop ) tidied up the selection and created a new layer with a mask of the inverted selection. ( Colour Range selects the background and, of course, that’s not the bit we want in our final image. ) This was the result.

03-DINASOUR by John Allen

Because this is a JPEG copy of that result, all of the pixels I masked out have now been replaced by white. If you save the image as a tiff or psd file those transparent areas ( where there are ’empty’ pixels ) will be preserved.

Next I hunted through my Lightroom library for a suitable new background. This one happens to be Epping Forest, just down the road from me. I copied the images into my working image of the dinosaur and dragged the ‘forest’ layer so that it was positioned underneath the beast.

A few tiny adjustments and ….

02-DINASOUR by John Allen

Success, I would say!!


Splash Down – v2

As promised – or threatened – here is a second version of the “Splash Down” sequence.
This one incorporates eleven separate images, all taken on the D800 with the Sigma 180mm macro lens.
The images were exported from Lightroom into CS5 where they were combined into a single file that had an initial indicated size of over 1 Gigabyte!
That slowed the Mac down when I saved it as a Tiff file!!

The layers were then merged by hand, using layer masks on each layer to hide the unwanted bits!