April 18, 2012

Tutorial - Digital Black and White: Part 2

TUTORIAL

Digital Black and White: Part 2

(excerpt from the book Stephen Johnson on Digital Photography unreleased revised electronic version)


Printing Black and White Digitally

I fell in love with photography largely because of the beauty of a black-and-white gelatin-silver print. I have now mostly abandoned that darkroom approach in favor of digital printing. However, my darkroom equipment remains, with lots of paper in the freezer. The digital era created a bit of a black and white limbo-land, but some very beautiful solutions are now in hand.

Inevitably, we compare our black and white results to traditional printing methods, whether gelatin-silver or platinum. A digital inkjet-based print is a different animal—one that can chase the look and feel of other mediums and that has its own unique aesthetic potential. The path you go down is of your own choosing; I'm finding it difficult not to pursue many as I try to understand what I want out of a black-and-white print in this digital age.

Black-and-white printing is both necessary and difficult. It is critical to many of us for its sheer beauty and because the language of photography does not always require color. In fact, scenes are often strengthened without color, relying instead on black and white’s inherent increased abstraction.

Digital printers are designed mainly to print color. Many twists and turns in gray balance and tricks to human perception are employed to make the highly capable color printers we now have. But many of those very improvisations have made printing neutral black-and-white prints very challenging. It is also true that most of us would prefer to have only one printer, one that will print our color and black and white equally well. This was very hard to do for a long time.

Various ways have been developed to creatively adapt to black and white challenges: substituting the printer’s color inks with black and grays (even 6 or 7 grays with black), elaborating workarounds to avoid a printer’s default color processing, or adding gray inks to the color set. All worked to some degree.

Black Gray Custom Inksets were a common solution to digital black and white inkjet printing for a long time, but have now been replaced by good options from the printing manufacturers themselves, Epson, HP and Canon. We now have a substantial effort by the printer companies to do great color, long life, plus added gray inks to the 6 color photo sets making for a dramatic versatility and stunning results.

Gray Ink Plus Color

  • Epson Ultrachrome K3 (on selected Epson printers)
  • Hewlett-Packard: Verio color, plus extra black and grays (on selected HP printers)
  • Canon: Lucia inkset of 6 color plus grays

The basic operation for all of these black and white driver controls is to start with what the manufacturer has determined to be neutral black and white printing, then enable us as users to customize the appearance through trying minimize or create color casts. Additional controls are often offered for overall density, and in some drivers shadow and highlight tonality.

As in so many of the these cases, allowing a little time, experimentation, good notes and test sheets are very helpful to the process.

Issues with Black-and-White Printing

  • Software: How do you preview and control the printing?
  • Neutrality
    -Paper/ink combinations produce image color variations.
    -Viewing conditions and color temperature of light influence neutrality of most black/gray ink combinations.
  • Density
    -Comparison to silver usually results in inkjet not quite coming up to a similarly rich black.
  • Longevity
    -How long will these inks last on which papers?
    -How are they tested, by whom, according to what standards?
  • Paper
    -Rag papers hearken back to platinum printing and births an altogether new look.
    -Glossy looks more like traditional silver prints.
  • Black inks for matte and glossy paper
    -New Inks from Epson and others.
    -Photo Black for glossy papers. Matte Black formulated for matte papers, extra need for black density.
  • Print Drivers/Control
    -Black/Gray Ink Printing Software
    -RIPs (raster image processors): software to translate your data into the printer’s format.
    • ImagePrint RIP, Best Color, etc.
      Replacement Drivers: QuadTone RIP


ImagePrint
ImagePrint is software for printing, featuring wide printer model support and profiles for color and black-and-white prints using color, gray inks, and supporting image tints. It includes an extensive library of downloadable profiles supporting a wide variety of papers and viewing conditions. Very neutral black-and-white prints are possible as well as image tints and split-toning. By supplying direct and beautiful solutions to black and white printing, ImagePrint has made a significant contribution to digital black and white photography.

ImagePrint includes traditional RIP features like scaling, nesting, and crop marks with extensive print correction controls for color, tone, saturation, and resolution are all built-in.

QuadTone RIP
A number of ink-makers and interested third-party developers have offered black-and-white printing solutions as well. The Quadtone RIP appears as another printer and if driven by tone color curves for different printers, papers, inkset for color tone, cool, neutral to warm. They can be mixed in various ways and is extremely versatile but requires experimentation.

epson3800ABW

Epson Advanced Black and White Print Controls

hp3200BW

HP Z3200 Grayscale Print Controls

 

quad3800

Quadtone RIP Print Controls

 

Tutorial with Related Subjects:

  • Black and White Conversion from Color

The View From Here - April 2012

pad39b
For all of the magic this photograph conveys to me, it still pales in comparison to what I saw.
Exit Glacier and Tundra. Kenai Fjords, Alaska. 1995.
from With a New Eye: The Digital National Parks Project.


THE VIEW FROM HERE
by Stephen Johnson

Our Eyes, Our Hearts, Our Photographs

We photograph because we see something of beauty, irony, human emotion, and countless other specific scenes of wonder and curiosity. Our eyes take in the visuals, our ears and skin various levels of ambiance, and we pull camera to eye and try to hold an impression of the light.

We often want to imbue the photograph with far more than was literally, visually there, and that is not surprising as human aspirations know few limits. We also want the recorded image to capture not just the moment and the electro-optical capabilities we set in the camera, but also we want our memories held. Those memories are assembled from the many moments spent looking around, taking in the scene and stimulating our desire to hold it in some way.

Challenges

There are a number of challenges along the way to this idea of bearing witness to what we see. Many of them are not specific photographic challenges, but tied deeper to all sorts of reasons we want to remember and share. Breaking some of those issues down a bit seemed worth a bit of effort for the essay this month.

For most of us, some level of beauty perceived and beauty rendered is at the core. Sometimes this is also the strange context of the word beauty as in something disturbing held and rendered with high craft and perception.

Whether color nuances or a myriad of other technical issues, and for all its pleasure, photography ties aspiration to product, experience to fixed rendition.

Color Accuracy

One challenge we face as photographers in love with the beauty of the natural world, is the depth and purity of a real world color. Seen color is often very different indeed from the photographic rendering. As unbelievable as the glacial blue I've managed to capture in some of my photographs, it pales in comparison to the real world experience of seeing that ice in reality.

There are many reasons for color misinterpretation, light sources and real-world nuance are some, the capacity of the cameras to hold the real light and color another.

Some color issues relate to the camera design, and its ability to process the color correctly. The silicon sensors in digital cameras are very sensitive to infrared, some IR cutoff filters on cameras are particularly aggressive and can render near IR visible color incorrectly, as in purple flowers being rendered cyanish blue. Other errors can be introduced with the JPG processing assumptions on-board. This needs to be noticed and corrected by editing the jpeg or watched through the RAW interpretation process to make sure the color is interpreted properly.

I always carry my Gray Caps, and my ColorChecker Passport so that I can photograph known colors, in the light that I am working in, with the same lens and exposure, to give me a reference point to process the color in the RAW file. This might be a simple white point adjustment by neutralizing the gray to identical RGB values, to making a new custom profile with the ColorChecker Passport software.

A Photoshop CS6 Video Edit of some color misrendering of purple flowers in Golden Gate Park. San Francisco. 2012.

There are other issues less related to photography and more to the totality of the experience, our being there, the smell, the being outdoors, the taste of the air, the exhilaration of being in the world, none of which is directly able to be photographed. It is an ambitious goal, meant for something far more than light capturing devices.

Memory and a Single Light Capture

We also have the element of our memory of the experience accumulating over a period of time, not a slice of a second of a camera's shutter. I call this experience the concatenation of memory. Photographically we end up wanting a single moment's image, based only on light to hold a stream of experience that we lived. Even without overtly thinking of motion or time passing that might suggest video, we assemble a mental image of memory from all of our glances around the scene, exploring the photographic possibilities, and want to hold them.

Memories of a place, even a specific scene, are built-up from dozens of glances. Our eyes refocusing, iris opening and closings, detail being noticed and mentally zoomed in upon, all of which ask the resulting photographs to encode these very diverse and wondrous memories into a single, two dimensional light-based captured moment. It is daunting.

Depth of Focus

For me, this dilemma suggests a number of approaches. One of which is to try to render the scene as much in focus as possible. I've never been a fan of selective focus. No matter what I glance at in the real world, it snaps into focus because that is how our eyes work. We focus on where we are looking. My own values regarding focus are much more closely linked with the heritage of Group f64. So my agenda is to always pay sufficient attention to discovering the ideal focus point and aperture to achieve the depth of field the image needs. As I've discussed elsewhere, this is rarely solved by just stopping down the lens and hoping, but rather through careful calculation and evaluation.

Mixed Light

Shadows and highlights in the same photograph can sometimes look very strange in the rendered file. Your up front experience was able to experience both, remember both, but then you have to deal with overly blue or overly warm renditions of a whole. There are times when the rendered scene demands modifying one or the other to match your dominant memory or what you now judge to look realistic. As neither is completely wrong or right, this is a fascinating dilemma. Sometimes easing off on both extremes of color adjustment to find a middle ground can work. Most often the scene is balanced for the brightest light, and any out of the ordinary overly blue shadows can be de-saturated a bit if their realism becomes a question.

Implication and Hope

In order for photography to be a means of communication, the subject matter must be light, by definition. It is amazing how often we expect an image to convey our feelings, perhaps because we felt something so strongly at the time we made the photograph. And that meaning may always be re-conveyed to us as our memories are triggered. With an audience, it can be much trickier. As the language of the medium is light, and we often hope for word based ideas to come through, we often ask of the medium qualities it is simply not capable of carrying.

There are some images though, so unique in the power of their human appeal of emotion, with very strong visceral reactions, that can generate all sorts of responses. They may not be specific ideas, but deep emotion does seem to be at the heart of our photographic medium's capabilities.

I frequently tell students you can't photograph ideas, but you can capture emotion. Words and meanings like nostalgia are elusive, and that you cannot depend upon your words being in the photograph you make. On the other hand, photography is such a remarkable and challenging medium that you can record things that are not even literally there by most reality standards, like a shadow.

We hope to communicate with our photographs, but that is often through implication and allusion, rather than literal meaning, even while we may hope for far more. That hope can be limiting though, our own intent may contain less than someone else might take from and bring to it, even as the image may contain less literal meaning than we may hope for. It is curious.

One of the attributes of most visual art is the ability to make something visually strong, but simultaneously somewhat ambiguous, giving the viewer a wide range of possible emotional reactions. This can sometimes take our own creations into realms we never imagined. This might be the best of all worlds.
lobos

Sierra Club Exhibit-Format Series Photography Books

Browsing a used bookstore in Half Moon Bay, I came across one of the exhibit-format series books David Brower put together for the Sierra Club in the 1960s. This one, the 9th in the series, the 1964 "The Sierra Nevada Gentle Wilderness," was a first edition for $20. I've got too many books, but I bought it after a moment of thought and my friendship with Dave, a few people on the Club's Publishing Committee such as Ansel Adams and Martin Litton. Martin was still flying when I last saw him a couple of years ago, then about 85. He started wooden dory trips down the Colorado River in the 1970s, and I was lucky enough to be invited along on one of the last trips in 1989.

These books were deeply influential on the environmental movement, photography's role in conversation and my own commitment to the natural landscapes of the earth.

lobos

The first book in the series was the 1960 "This is the American Earth" by Ansel Adams and photo critic Nancy Newhall. It was a deeply influential book.

Shortly thereafter "In Wildness is the Preservation of the World" appeared featuring the work of Eliot Porter. It was a remarkable call for the preservation of the natural world.

I remember a time in the early 1980s at Friends of the Earth, Dave Brower showed me the original 3-ring binder containing Eliot's book proposal, with prints in sleeves and typed captions. I don't remember clearly how much text was in the binder, but I felt privileged to see and hold what I considered to be a treasure.

My friend Dave Bohn continued on with the 9th. installment of exhibit-format series in 1967 with the book "Glacier Bay: The Land and the Silence." It was a major influence on me years later. In 1979, I was introduced to Dave Brower who offered to help me with my "At Mono Lake" project through which we became friends. Dave Bohn also helped with the book, contributing a commentary, some photographs and some organizational finesse. A world started to open up for me that circled right back to some of the people who opened up my eyes to the power of photography to inspire people to save natural places.

Do you know these books? Which influenced you and how? Let us know.


Photoshop CS6: Better RAW and Video

With the release of the Photoshop CS6 Beta I can now talk about what I believe to be some of the significant new features.

RAW
The increased power and smoothness of the RAW Processor is an important improvement. It is now possible to hold very high dynamic range captures and process them into a very useable form. The Recovery and Fill sliders have been replaced by new Shadow and Black sliders for the dark values being managed and White and Highlight sliders.

Aggressive use of Recovery and Fill in the past could produce an unusable banding between the extreme values held and the rest of the image. These new controls seem to give much more flexibility and not produce the banding, which is a major step forward for the program.

Since this is very close to what I've been asking for for some time, I am very pleased with the progress. Although Eric Chan already no doubt had a good idea where he was going with this part of the RAW Processing engine, it does make me feel great that the result is almost a mirror of what he and I talked about at a party in New York next to a big picture window at sunset overlooking lower Manhattan in 2010. Thanks Eric. And of course, as always a special thanks to Thomas Knoll and Zalman Stern.

lobos

The View Out the Window NYC, RAW and Dynamic Range Discussion. iphone photos. 2010.

This doesn't eliminate the need for HDR exposures in some cases, but if the scene can be captured by the camera, it is now much easier to render out extremes of contrast into a smooth and human rendition.

Video
The new video editor in CS6 makes editing and correcting small video projects almost a joy. With the comfort and power of Photoshop's familiar controls, I now feel empowered to do color and tone correction, generate titles and assemble cuts into a photographically based set of decisions. It is a kick to use and opens up many possibilities.

Link to download the Photoshop CS6 Beta


April Special: A Free Print or Consult


Take our Pt. Reyes Workshop next weekend April 21-23, or the Pt. Lobos/Carmel Workshop coming up the following weekend, April 28-30, 2012 and you get your choice of a Print of the Month original signed photograph or a Coupon for a One Hour Consulting with Steve free with your enrollment!



Students can choose either this month's Featured Print from Pt. Lobos or One Hour of Consulting (normally $250), in-person or virtual. The consulting might take the form of a color management tutorial customized to your needs and equipment.



We’ve also posted some new videos on our YouTube page that might be useful to you.  Be sure to “thumbs-up” the video if you do!

April 6, 2012

Tutorial - Contrast Without Saturation Change

TUTORIAL

Contrast Without Saturation Change

(excerpt from the book Stephen Johnson on Digital Photography unreleased revised electronic version)

Using Adjustment Layers to edit photographs in Photoshop is a wonderfully freeing and powerful way of working in a non-destructive manner. My most common edits involve small contrast changes in a Curves Adjustment Layer.

In color photographs, increasing the contrast will also likely lead to a perceptible increase in saturation when the Adjustment Layer is set for it's default Normal Blend Mode. This can create an unnatural level of saturation when only a contrast change is being sought. The default Blend Mode, normal is just that, the normal blend mode which edits all three grayscale channels making up the RGB file in a way that also pushes the contrast, even if such a side-effect is not desired.

A simple change in the Blend Mode from Normal to Luminosity will eliminate this saturation change, imposing the curve as though the image was currently in the LAB mode where the grayscale brightness values can be edited separately from the color.

ps layer normps layer lum

Tutorial - Smart Photo Downloading

TUTORIAL

Smart Photo Downloading

(excerpt from the book Stephen Johnson on Digital Photography unreleased revised electronic version)

Using Adobe Bridge PhotoDownloader or Lightroom's Import download feature empowers photographers to take care of critical matters right up front.

Location: choose the location to offload the files.

Create Subfolder: Auto Folder Name Generation create and name custom folders according to what makes sense to you. I use year, month, day.

Rename Files: Custom naming, instead of using the arbitrary photo names coming out of the camera, custom name your photos on download to something that makes sense to you for easily find later. I use the same naming protocol as the folder name, with the added custom text identifying the place.

Convert to DNG: convert your files on download from the proprietary camera format to Adobe's documented DNG (digital negative) format.

Save Copies to: Back up Copy as a basic safety measure, simultaneously back up your files to a second drive as you offload.

Apply Metadata: add your name, copyright and contact information, all on download. Make custom Metadata Templates that contain all of this information always ready to apply to your photographs.

notecards

Tutorial - Simple File Indexing

TUTORIAL

Simple File Indexing

(excerpt from the book Stephen Johnson on Digital Photography unreleased revised electronic version)

For many years I've been tracking my digital files with a simple little utility called Disk Tracker.

It is just a simple file name and basic info tracker, that indexes disks automatically or manually and lets you search for files at will. There are many file tracking utilities out there, for both the Mac and the PC. I would strongly suggest you use one of them, even if you are using Lightroom or Aperture with their built-in databases.

Finding precious files is of course made much easier by careful file naming to begin with, particularly for photographs. Which is why I always custom name my photographs on download into a sequence that helps me identify and find the images later.

Example

Date as start of file name:
20110405

Custom location name:
ptlobos

Then numbered sequence within the set:
0001

Resulting in a stream like this:
20110405_ptlobos_0001

notecards

Tutorial - Long Exposures

TUTORIAL

Long Exposures

(excerpt from the book Stephen Johnson on Digital Photography unreleased revised electronic version)

Long exposures, at night for star trails, or simply because of low light, once meant simply the bulb setting (or T) on the shutter, and some calculations (guesstimations) of reciprocity failure exposure compensation, multiple tries and faith. Absolutely beautiful work could be done, but it took practice and patience–of course, most photography does.

Nowadays things are different, but challenges remain. Silicon builds up noise with long exposures, with heat being one of the problems. In astrophotography this is battled back by cooling circuits on the cameras, or even liquid nitrogen for the big guys.

Many of our cameras now have long exposure noise reduction modes which very cleverly takes a photograph subsequent to your exposure, of the same length, with the shutter closed, thus producing a noise map of the sensor. That so -called dark current image is then subtracted from the image. These features are well worth using.

Additionally, lower resolution dSLR cameras tend to be more sensitive as their pixel wells are larger, therefore have more silicon per pixel to gather photons. I've seen the difference between a 6 megapixel dSLR and a 22 megapixel camera, at the same ISO, aperture and time, reveal the Milky Way in the lower res photo, and barely see stars in the other.

Focusing can also be a real problem on low light photography. A green laser can sometimes help by providing a bright pinpoint of light to focus on when pointed at your subject.

notecards

Star Trails and Crosses (combined from 3 different exposures). Mission San Antonio. 2011