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What In The World Is HDR ?

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1 EV is equivalent to 1 F-Stop of brightness

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These Contrast Ration (CR) figures are approximate

Dynamic Range
Today, many people think HDR refers to the practice of merging bracketed exposures with software, but HDR actually applies to everything in an imaging workflow - capture, processing, display, and printing.

What is HDR? HDR is an acronym that stands for High Dynamic Range. It’s the opposite of LDR or Low Dynamic Range Imaging.

What is dynamic range? In imaging, dynamic range (DR) is the highest overall level of contrast found in an image. In other fields, such as in the audio industry, dynamic range is used to describe similar phenomena. In audio, DR is defined as the logarithmic ratio between the largest readable signal and background noise. DR is akin to signal-to-noise ratio. In imaging, DR refers to the entire image. Consider an image a signal – and every signal has some noise.

The values used to specify dynamic range can be charted on multiple scales. Whatever language is used to describe this phenomenon, two critical factors must be addressed; the total range of brightness and the fineness of the steps used within the scale.

Two scales are most useful for images – exposure value and contrast ratio. Exposure value (EV) is easier to use while contrast ratios better display logarithmic increases in light intensities. Both refer to the same phenomenon – relative increase or decrease in brightness.

The EV scale makes it easy to compare the ratios rather than the big numbers of logarithmic progressions; each successive EV rating represents a doubling of values. The exposure value (EV) scale has been used by photographers for ages. The International Organization for Standards (ISO) defines EV 0 at an aperture size of 1 and a 1 second exposure time. The same EV can be achieved with any other combination of f-stop and shutter speed that produces the same amount of light.

‘The contrast ratio scale specifically delineates values; when you use this rating you instantly see how much greater each step in a progression is than the previous one because the numbers are so much bigger. You can convert EV to contrast ration or vice versa with the right formulas. 2 (power of EV) = contrast ratio (2*8=256 for a contrast ratio of 256:1) or EV=log10(contrast ratio)*3.32 (log10(4000)*3.32=12EV

Dynamic range, gamut, and bit-depth are often confused. Though related, they’re all different. Dynamic range refers to a total range of luminosity values. Gamut refers to a total color capacity, including saturation. Bit depth refers to the number of points of data between values or the fineness of the increments in the scale. Just because an image is wide gamut doesn’t mean it is HDR or has high bit depth, but it will contain more and potentially better data if it does. Just because an image is HDR doesn’t mean it is wide gamut and has high bit depth, but it will contain more and potentially better data if it does. You can’t convert low dynamic range, small gamut, low bit depth information to high bit depth, wide gamut, high dynamic range information. To get it and use it, you have to capture high-quality information upon exposure and preserve it throughout your workflow.


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22 Great Quotes By Duane Michals

 
Enjoy this collection of quotes by photographer Duane Michals.
“Trust that little voice in your head that says ‘Wouldn’t it be interesting if…’; And then do it.” – Duane Michals
“Don’t try to be an artist. Find the thing within you that needs to be expressed. You might find it is art.” – Duane Michals
“I am an expressionist and by that I mean that I’m not a photographer or a writer or a painter or a tap dancer, but rather someone who expresses himself according to his needs.” – Duane Michals
“People believe in the reality of photographs, but not in the reality of paintings. That gives photographers an enormous advantage. Unfortunately, photographers also believe in the reality of photographs.” – Duane Michals
“Photography deals exquisitely with appearances, but nothing is what it appears to be.” – Duane Michals
“I never photograph sunsets and I never photograph moonrises. I’m not interested in what things look like.” – Duane Michals
“You can never capture a person in picture, never. You might get an interesting expression or gesture. I almost never research a picture subject ahead of time. I think Karsh is full of baloney. Can you imagine spending a whole week out in La Jolla with Jonas Salk soaking up his ambiance, then wind up making him look as if he’s in the studio in Ottawa with his thumb under his chin?” – Duane Michals
“Because of my involvement with my photographs, it is difficult for me really to see them objectively. Talking about them is like talking about myself. The only real idea that I have about them is that they are essentially snapshots. For snapshots, I feel, often have an inherent simplicity and directness that I find beautiful. The roots of my photographs are in this tradition.” – Duane Michals
“However, I think that the photographer must completely control his picture and bring to it all his personality, and in this area most photographs never transcend being just snapshots. When a great photographer does infuse the snapshot with his personality and vision, it can be transformed into something truly moving and beautiful.” – Duane Michals
“The best part of us is not what we see, it’s what we feel. We are what we feel. We are not what we look at . . .. We’re not our eyeballs, we’re our mind. People believe their eyeballs and they’re totally wrong . . .. That’s why I consider most photographs extremely boring–just like Muzak, inoffensive, charming, another waterfall, another sunset. This time, colors have been added to protect the innocent. It’s just boring. But that whole arena of one’s experience–grief, loneliness–how do you photograph lust? I mean, how do you deal with these things? This is what you are, not what you see. It’s all sitting up here. I could do all my work sitting in my room. I don’t have to go anywhere.” – Duane Michals
“I write in order to express what the photo itself cannot say. A photograph of my father doesn’t tell me what I thought of him, which for me is much more important than what the man looked like.” – Duane Michals
“Photography does deal with ‘truth’ or a kind of superficial reality better than any of the other arts, but it never questions the nature of reality – it simply reproduces reality. And what good is that when the things of real value in life are invisible?” – Duane Michals
“I believe in the invisible. I do not believe in the definitive reality of things around us. For me, reality is the intuition and the imagination and the quiet voice inside my head that says: isn’t that extraordinary? The things in our lives are the shadows of reality, just as we ourselves are shadows.” – Duane Michals
“Photographers tend not to photograph what they can’t see, which is the very reason one should try to attempt it. Otherwise we’re going to go on forever just photographing more faces and more rooms and more places. Photography has to transcend description. It has to go beyond description to bring insight into the subject, or reveal the subject, not as it looks, but how does it feel?” – Duane Michals
“I believe in the imagination. What I cannot see is infinitely more important than what I can see.” – Duane Michals
“Photography is essentially an act of recognition by street photographers, not an act of invention. Photographers might respond to an old man’s face, or an Arbus freak, or the way light hits a building—and then they move on. Whereas in all the other art forms, take William Blake, everything that came to that paper never existed before. It’s the idea of alchemy, of making something from nothing.” – Duane Michals
“I use photography to help me explain my experiences to myself.” – Duane Michals
“I think photographs should be provocative and not tell you what you already know. It takes no great powers or magic to reproduce somebody’s face in a photograph. The magic is in seeing people in new ways.” – Duane Michals
Duane Michals
“I am a reflection photographing other reflections within a reflection. To photograph reality is to photograph nothing.” – Duane Michals
“All good work has magic in it, and addresses the mind in a subtle way.” – Duane Michals
“Art is really whispering, not shouting.” – Duane Michals
“My gift to you is that I am different.” – Duane Michals
View 12 Great Photographs By Duane Michals.
Watch Duane Michals talk about his art.

22 Quotes On Flow

Quotes_Flow
Enjoy this collection of quotes on the state of flow.
“Let’s make things exist and then judge later. Don’t cancel the process of creativity too early: Let it flow.” – Ross Lovegrove
“One of my teachers once said that the way you know you’re on the right path is that it works. Now, that doesn’t mean you don’t run into blocks and brick walls, but it does mean that you can find a way around them or find a way to change yourself or your project in order to find the flow again and have it work.” – James Redfield
“I live my life on self-believe and I live it partly on going with the flow.” – Melanie Brown
“Life is so much easier when I allow myself to be myself and go with the flow. Whatever that looks like on a given day. If I can get quiet enough to truly check in with myself, I usually end up on the right track.” – Taylor Schilling
“The most important part of life is work, it’s the flow, it’s getting stuff done, feeling like you’re doing something.” – Penn Jillette
“My hand does the work and I don’t have to think. In fact, were I to think, it would stop the flow. It’s like a dam in the brain that bursts.” – Edna O’Brien
“Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow.” – Paracelsus
“The idea flow from the human spirit is absolutely unlimited. All you have to do is tap into that well.” – Jack Welch
“The self expands through acts of self-forgetfulness.” – Mihály Csíkszentmihályi
Read More

5 Ways To Use Abstraction

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1 – Simplify

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2 – Clarify A Structure

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3 – Show A Process

 
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4  – Visualize A Concept

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5 – Create A Pattern

To one degree or another, every photograph is abstract. At a minimum, photographs are flat rather than three-dimensional. Some photographs are more graphic than others, and the origins of a few photographs are virtually unrecognizable. Determining to what degree a photograph is abstract, how it is abstract, and why it’s abstract will help you understand more about it and its creator’s intentions; this might be you.
Abstraction can serve many functions: it can direct, structure, inform, and express.
Whether you use it a little or a lot, abstraction is a vehicle that can help you strengthen your stories and clarify your point of view. As every image is abstract to one degree or another, ultimately, the question is not whether you will use abstraction but how you will use abstraction in your images. Exploring abstraction is time will spent.
Read the full article on Craft & Vision.
Learn more in my creativity and digital photography workshops.
 
 

Photographers Celebrate The Power Of The Print


“The industry’s most respected photographers, brought together for the new Print Your Legacy campaign from Epson, talk about what drew them to photography, the inspiration that drives their work and the stories behind their most famous images.”
Hear these photographers celebrate the power of the print.
John Paul Caponigro
Jeremy Cowart
Gregory Crewdson
Steve McCurry
Mark Seliger
Tim Tadder
Amy Toensing
Stephen Wilkes
Learn more in my digital photography and digital printing workshops.
Read more with my online Printing Resources.
View more with my Printing DVD.