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Composite of a sunflower: X-ray, light and Hα
In a digital world we can combine different digital sources. This photo of a sunflower is a composit of its X-ray, its photo on a lightbox and monchromatic sunlight at a wavelength of 635nm (Hα light).
In fact: this is an example of an impossible thing. But you may be able to feel the warmth of a sunbeam emerging of the core of the sunflower. And the petals act as prominences.
This sunflower is a composit of X-ray, monochromatic Hα light of the sun and a sunflower on a lightbox. © Julian Köpke -
Primroses
I felt very much attracted by these primroses. They were close to purple and red and I could see them already as a beautiful print.
But how photographing them on a lightbox ? They always toppled over. Many efforts were useless. Blossoms tend to move, always.
On this photograph I put the blossoms top-down. Because any arrangement could be done then. It works !
Purple Primroses © Julian Köpke A different color show the orange primroses. Composition with or without leaves ? Without gives more the impression of a painting.
Primroses II © Julian Köpke 
Primroses I © Julian Köpke -
Three vetches
X-ray images give an insight into the inner (or hidden) structure of a flower. HDR images on a light box are quite close to this.
Today I wanted to show the softness of petals and went to my dealer. She sold me three vetches, not really expensive for the purpose.
This is my third composition today of the three vetches on my lightbox. The play of the light in the petals resembles to some extent X-ray images.
Three vetches © Julian Köpke -
End of wintertime
Our weather is more and more weird. Today was the second day with a warm sun and a blue sky. Nights are getting pretty cold, days up to 25 degrees Celsius.
Cleaning up our garden led us to some old physalis which were a little more than a skeleton. In autumn these fruits look like lanterns, now they resemble an X-ray.
I did this shot on a lightbox using manual HDR technique.In Lab color mode I obtained this image with a pur black background.
It’s an exoskeleton for the fruit inside which remains that way without bruises.
Physalis after winter has gone. © Julian Köpke -
X-ray Odyssey
How to communicate an erratic process in terms of an image ? The Iliadic greek were pirates of the Mediterranean with fast vessels, invading mainland from the seas, enslaving people, robbing stocks and much more.
The writing down of the Ilias was between 678 and 662 B.C., a time of Assyrian dominance and cultural superiority.
With three different Nautilus shells I bought last September on Crete I did this composition on my big X-ray sensor with 35cm x 43 cm and 170µm per pixel resolution. Two energy levels were necessary to get a high resolution image of the core of the Nautilus shells.
Odyssey © Julian Köpke To overcome the look-and-feel of a medical X-ray it is a logical idea to invert the light. Black becomes white and vice versa. White means shining through of X-rays, black means opacity. It’s like a dream !
Odyssey (light inversion) © Julian Köpke -
Nautilus and Flowers
How to prepare a X-ray session ? What flowers suit to a Nautilus shell ? Where does color come in ?
I went to my gorgeous florist to have a look what offer she can make during wintertime. My phantasy were spinning around something ethereal or unrealistic. I bought some flowers with respect to their shape.
The Anthuria caught my eye immediately. The Tulip was still closed and got more and more yellow within hours.
All these compositions shown here were made with dual energy X-ray. The lowest energy of the tube is 40kV, which yields with 4 mAs a quite good insight of flowers. For the center of the Nautilus shell, 70kV and 2.5 mAs is more appropriate.
My first composition was a Nautilus taking off a bouquet of flowers. This reminded me of Renaissance engravings full of symbols. I do not feel depressed. The representation as a X-ray positive jsut shows the bouquet.
Miraculous flowers and nautilus shell © Julian Köpke 
Miraculous flowers © Julian Köpke A more grounded composition is the second with a Nautilus shell moving towards the roots of my bouquet. Hopefully, the plants will survive. The positive representation always needs some extra editing. By just inverting the Blacks and the Whites the Nautilus would be too dark. Our reception cannot be just inverted and feels alright.
Flowers and Nautilus © Julian Köpke 
Flowers and Nautilus © Julian Köpke With the look-and-feel of old engravings in mind the third composition ist between surreal and a still. It took me some time to mask out the flaws of an original X-ray to get a true black background. Masking can be done iteratively and easily combined with Photoshop. („That’s what Photoshop is made for !“).
Some colorizing was done to overcome missing photographic shots. There was simply no time in my X-ray unit to do both at a time.
Nautilus shell as a vase or a vessel („Hansekogge“ or cog) © Julian Köpke 
Positive representation of Nautilus shell as a vase or a vessel („Hansekogge“ or cog) © Julian Köpke 
Coloured Nautilus shell as a vase or a vessel („Hansekogge“ or cog) © Julian Köpke 
Coloured positive representation of a Nautilus shell as a vase or a vessel („Hansekogge“ or cog) © Julian Köpke My fourth composition is called „The Argonauts“. The Nautilus shell serves as Argo, the legendary fast ship, with its crew, called Argonauts. The colored version is more convenient for our eyes. As before the X-ray positive looks more ethereal.
A Nautilus with flowers as Argonauts © Julian Köpke 
A Nautilus with flowers Argonauts © Julian Köpke 
X-Ray positive of a Nautilus with flowers as Argonauts © Julian Köpke 
Colored X-ray positive of a Nautilus with flowers as Argonauts © Julian Köpke -
A day on Germany’s summit
Is there poetry in a landscape ? Does an image give the impression of poetry ? These questions came up when looking down from the Zugspitze at the Alpine folding.
It was a cold day with with warm rays from the sun. No winds, except at the border to Austria. We were lucky to spend a few hours up there at about 2960m.
This folding was soft and wild at the same time. Is it a solidified sea ? A petrified curtain ? Only the light creates the feelings.
Poetic Alpine Folding © Julian Köpke -
Transparency and Energy in X-Rays
You always need some time to find out the best exposure values for a photo. Same idea holds in X-Ray imaging.
Today I did an x-ray series with my biggest Nautilus shell on a conventional radiography sensor, not a film. Starting from the lowest possible value 40kV an increment of 10 kV up to 70 kV can be seen in the images:
40kV 10mAs Black regions in the image a transparent, white are opaque. The center of the Nautilus has a loss of structure.
With 50 kV the structure in the center of the Nautilus is better depicted wheras the edge gets more transparent:
50kV 2mAs Same effect for the center and the edge can be seen with 60 kV:
60kV 2mAs With 70 kV it’s an exaggeration for the edge and best depiction for the center:
70kV 10mAs Higher kV means more transparency for denser structures but a loss of structure in transparent areas.
At fixed energy, X-Ray imaging behaves like a shadow related to visible light. When photographing, there is not chance to look through an opaque object. With higher energies, x-rays go through opaque objects and can be collected on a sensor.
Composing the images obtained at different energies is an X-Ray HDR image:
Nautilus X-Ray Energy HDR © Julian Köpke The representation of an X-Ray with white on black is a reminiscence of the film era. Radiologists just looked at the negatives ! Inverting black and white shows the positive image, like a print. Here I show the same image as positive, but rotated and flipped horizontally. Look how ethereal it appears now:
Nautilus X-Ray Energy Compressed © Julian Köpke -
Mediterranean creatures on a lightbox
Today I put some tests on my cretean purchases from last September to evaluate their potential of being subject to fusion imaging. I bought three Nautilus shells and two sea snails, holding them in the store against the sun to check their transparency. My untidy studio accommodated these precious stones under quite a bunch of something.
The best representation is with a black background, i.e. with inverted L-channel in Lab colors. With a black background a soft shining light appears in the objects.
This snail has a shape a triangle and resembles a bear claw or an Apollo capsule in the late Sixties. The translucency is very little.
Cretean Snail © Julian Köpke The following snail has a classic shape. With the black background it resembles a galaxy in outer space.
Mediterranean Snail II © Julian Köpke My first attempt with the Nautilus shells led me to a copper-like color representation with a single shot image. Lab colors is the key to this color and light distribution. Very attractive is the fact of two shells turning right and one left. Why did I wait so long to make this image ? Why do we miss important opportunities ?
Three Nautilus shells with light inverison © Julian Köpke -
Sunny Sylt
After a rainy New Years eve and a cloudy 1st January there was a chance to escape to an island in the sun: Sylt.
A walk south along the beach at noon had a phantastic front light. We strolled without sorrows. The horizon wasn’t clear at all.
It’s good to have these days without sorrows.
Strollers sans soucies. Beach Westerland, Sylt. © Julian Köpke Short after 4 pm the sunset happened much earlier than in southern parts of Germany. The winds became more weak. A composit image of horizontal motion blur and a normal shot after the camera movement rendered a little bit of structure.
Sky and North Sea © Julian Köpke Increasingly great reflections occurred the next minutes. Hot waters ?
Reflections at sunset near Westerland at low tide © Julian Köpke The darker it becomes the more fatigant is our way home. Less people are now on the beach. All tend to go home.
People are going home at sunset. Evening glow with clouds at Westerland Beach. © Julian Köpke
