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Mostly color perception

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The Internet is an amalgam of forms blurred under epistemological pressures. In Søren Kierkegaard’s words, under this flat shower of leveled information, where everybody is interested in everything and nothing is too trivial or too important, people just accumulate information and postpone decisions indefinitely, i.e., nobody takes action and nobody is responsible for truth — there is no mastery, just gossip. He called this the æsthetic sphere of existence, exhorting us to evolve to the ethical sphere, where we do not just accumulate information but take action and make commitments. Blogs are instruments to overcome flatness by creating opportunities for vertical activities. In this sense this blog is a view from my window — a collection of tidbits I judged relevant to computational color science and in general to the promotion of scientific excellence in areas of strategic importance for the future of research, economy and society.
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Blog categories:  | All  | color reproduction  | color science  | digital publishing  | imaging  | perception  | research process  | review  | science

» ISCC/IS&T "Black and White" Meeting, Nov 2008

ISCC/IS&T 2008 Special Topics Meeting,
“Black and White Conference”
Saturday, November 15, 2008

The Black and White Conference will follow the 2008 IS&T/SID Color Imaging Conference with a program devoted to the special challenges and solutions for black and white, two of the most important properties of a colored image. Evidence of recent interest in the blackness and whiteness of images and objects are the IDEAlliance Print Properties subcommittee on paper characterization, the SIS (Swedish Standards Institute) Workshop on the optical properties of paper, CIE Publication 163 on the Effect of Fluorescence in the Characterization of Imaging Media, and papers at recent Color Imaging Conferences.

Key topics at the meeting will include the measurement of white materials, three-color overprints versus true black, the impact of novel light sources on the rendition of colored images, very black materials, strategies for assessing black and white objects, and blackness preference.

The meeting is scheduled for Saturday, November 15, following Color Imaging Conference 16 in Portland, Oregon. Please submit abstracts to Ann Laidlaw at alaidlaw-at-xrite-dot-com.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, May 14, 2008 at 2:16:00 PM
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» World Wide Gamma

An experimental tool post to crowdsource the average 'gamma value' for the world wide web. To learn more about gamma you can read the FAQ and also the FQA by Charles Poynton.

Instructions
1. Use '+' and '-' buttons to make the corresponding patches above the buttons lighter or darker.
2. Create a visually equal spaced gray ramp from black on the left to white on the right. That is the jumps in lightness between neighbors should be roughly equal and the ramp should be getting progressively lighter.
3. Click on the 'Plot' button to see your results(black) plotted versus the world wide gamma(red).


Note that users of older versions of Safari (ie 1.3.2) have reported that this post is not interactive, but it has been tested with newer versions of Safari (ie 3.1.1) and the post is functional.

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Posted by Giordano Beretta or Nathan Moroney on Friday, May 09, 2008 at 7:25:00 PM
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» Toyon Red



Terminal three of the San Francisco airport is currently hosting an exhibit on Catlinaware. These depression era ceramic products produced on Catalina island are quite striking. They were manufactured in a range of colors, including toyon red. The display about the glazes used for Catalinaware noted that in total nearly twenty different glazes were used, and many were inspired by the natural colors of the island.

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Posted by Giordano Beretta or Nathan Moroney on Thursday, May 01, 2008 at 12:03:00 PM
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» A Color Calculator

A purely visual color calculator. No sliders, perceptual attribute correlates or instructions.


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Posted by Giordano Beretta or Nathan Moroney on Monday, April 14, 2008 at 12:18:00 PM
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» Administrative note and color lawsuits

First an administrative note. Most feedback we get from you, our esteemed readers, is in the form of personal email. Only rarely are we able to generate sufficient controversy to spark a debate in the blog comment section, such as with Non-local realism, An On-Line Color Thesaurus, or yesterday's Revolutionary White Reflectance Standard for Metrology. Therefore, we are happy for every good comment we get. However, as you are aware our blog server is rather crafty, and it is difficult for us to find comments when you replace the post title with your own title. This summer HP will be upgrading to commercial blogging software and this blog will run smoother, hopefully even multilingually. In the meantime here is my answer to a comment on color lawsuits I was unable to locate.
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Posted by Giordano Beretta or Nathan Moroney on Wednesday, April 02, 2008 at 4:57:00 PM
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» Revolutionary White Reflectance Standard for Metrology

Today two color scientists at HP Labs announced the introduction of a revolutionary new white reflectance standard for metrology. This new reflectance standard is a breakthrough in terms of cost, simplicity and unique environmentally friendly disposal process. This new white standard will have broad impact in the fields of photonics, digital photography and color measurement and is available for immediate commercial and research use.

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Posted by Giordano Beretta or Nathan Moroney on Tuesday, April 01, 2008 at 1:50:00 AM
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» Testing Express

Thanks to Pau for hurling a link to the new PhotoShop Express online. Tried it out and found it to be an interesting combination of photo sharing and image editing with a flashy interface. It does have a button to 'turn photos into ahhhhtwork'. The back button is broken though.


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Posted by Giordano Beretta or Nathan Moroney on Thursday, March 27, 2008 at 2:31:00 PM
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» Performance update

A year ago I posted two entries on hyperthreads and multicores that were relatively popular. A short post on the the Performance Agora has an interesting comparison of the performance of the latest crop of Intel chips suggesting that the 8-way Penryn TPC-C performance now matches a 16-way Xeon of 2 years ago.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, March 26, 2008 at 5:13:00 PM
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» This is not Easter Blue


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Posted by Giordano Beretta or Nathan Moroney on Friday, March 21, 2008 at 9:07:00 PM
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» More on print services

My post about print services appears to have caused some confusion. While I prefer to get feedback in the form of comments, so others can also comment and a dialogue is established, here are some clarifications — at the risk of making things even muddier.

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Posted by Giordano Beretta or Nathan Moroney on Friday, March 21, 2008 at 5:32:00 PM
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» Blue iris


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Posted by Giordano Beretta or Nathan Moroney on Thursday, March 20, 2008 at 5:48:00 PM
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» Print services

Computer science — or informatics, as it is called more appropriately in Europe — has a less linear progress history than other technologies. Indeed, many a breakthrough technology was forgotten only to be reinvented several decades later. I had already posted on concurrent programming (in the comments) and color encoding.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, March 19, 2008 at 6:16:00 PM
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» Navy Blue is the New Salmon

Navy blue is the new salmon - at least for delicious.

Last week Bernard Kerr and Joshua Schachter of Yahoo! del.icio.us gave a presentation (video to be posted here) about 'Making delicious tastier' or a preview of a 'more web 2.0' version of del.icio.us. Once again as a color guy I latched on to the color changes first - the salmon highlight color for the 'saved by' field is on its way out and a blue highlight will be it's replacement.


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Posted by Giordano Beretta or Nathan Moroney on Tuesday, March 18, 2008 at 5:56:00 PM
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» A Visual Introduction to Mostly Color Perception

A purely visual meta-post or blognails that covers some of the posts from the past few months of Mostly Color Perception.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, March 05, 2008 at 9:05:00 PM
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» Encoding color

No matter what color space you are using, how you are compressing an image's spatial content, and in what file format you will encapsulate your image, you have to choose a color encoding standard. In this post I will write about color encoding.
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Posted by Giordano Beretta or Nathan Moroney on Tuesday, March 04, 2008 at 6:35:00 PM
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» This is not International Klein Blue

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Posted by Giordano Beretta or Nathan Moroney on Thursday, February 28, 2008 at 8:21:00 PM
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» Bay Area SID Presentation on New CIE Cone Photoreceptor Fundamentals

An upcoming Bay Area SID presentation of interest to color and imaging fans. Mark your calendar.

Title: "The New CIE Color Space Based upon the Cone Photoreceptor Fundamentals"

By: James Larimer, PhD, ImageMetrics, LLC

Location: Singapore conference room of Apple Computer at 1 Infinite Loop, Cupertino, CA 95014

When: 6:00PM, 03/06/2008, Thursday

Map: Here

Abstract:

In 2006 the CIE published a new color space standard based upon the cone photoreceptor fundamentals. This talk will describe those basis functions, a brief history from Newton through Maxwell leading to the new color space, and the additional published norms or correction factors included in the standard for age related changes in optical densities of the lens and other ocular media. The lecture will end with a discussion of multiple primary displays, metamerism, and the future potential for displays to reconstruct power spectra isometrically yielding true color images. (See Brill, M.H., Larimer, J. (2007) Metamerism and Multi-Primary Displays. Information Display, 23/7, 16-21.)

Speaker Bio:

Dr. Larimer is President of ImageMetrics, LLC. ImageMetrics provides engineering services related to the selection of task specific displays, mitigation of signal capture and processing artifacts such as jaggies, judder, and tone scale banding, and engineering issues related to color. Dr. Larimer has been a university professor and department chairmen, a program director at the National Science Foundation, and recently retired as Senior Scientist from NASA's Ames Research Center. He has held every office in the Bay Area Chapter of the SID, and served as SID VP for the Americas. He is an Associate Editor of JSID and Co-chair of the IS&T/SID 2008 Color Conference.

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Posted by Giordano Beretta or Nathan Moroney on Tuesday, February 26, 2008 at 7:49:00 PM
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» Printers on the run

As Marshall McLuhan wrote, instead of saving work, labor-saving devices permit everybody to do their own work, i.e., it lowers the entry bar. For printers this has always entailed two things: improve the workflow so that rush jobs with special requirements can be handled efficiently, and move up in the value chain to provide integrated services.
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Posted by Giordano Beretta or Nathan Moroney on Friday, February 15, 2008 at 3:30:00 PM
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» mbogBMCOGKYF Printing

Chuck Close has long been a fine artist that I've appreciated and enjoyed. His work often strikes me as having an unusually high level of technical proficiency. His giant portraits created with multi-colored or multi-toned grids of nested forms shows the principles of additive color mixing perfectly and are striking and unique pieces. His life and works have been previously covered in a radio interview from 2004. Now the GTD crowd can hear this interview and think process, persistence and productivity given adversity. In comparison a color scientist can hear it, poke around his web site some and think: yowza he does all this and 12-color separations, too!

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, February 13, 2008 at 3:23:00 PM
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» A whiter shade of pale

When we render complexion in preferred color reproduction, we must enhance the color to match local cultural expectations. The expectations are set by color consultants, who are influenced by what is available from industry. A recent breakthrough will require we tweak our color lookup tables.
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Posted by Giordano Beretta or Nathan Moroney on Tuesday, January 15, 2008 at 5:05:00 PM
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» High-Dynamic-Range (HDR) Photographic Survey

Mark FairchildLast August, Prof. Mark D.Fairchild, Professor of Color Science and Director of the Munsell Color Science Laboratory in the Chester F. Carlson Center for Imaging Science at the Rochester Institute of Technology released an image database for research in High-Dynamic-Range (HDR) imaging. This database is called the HDR Photographic Survey.

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Posted by Giordano Beretta or Nathan Moroney on Thursday, December 13, 2007 at 9:29:00 PM
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» Postcard from Albuquerque

In big corporations the hand often does not know where the foot is and then shoots itself in the foot. Now I am finally able to get at my email after my old mailbox was secretly deleted over two weeks before I got access to the new mailbox. There I found a postcard from Albuquerque I would like to share with you. It was sent by John McCann, who shot it on his HP PhotoSmart C945 camera and kindly gave permission to reproduce it in this post.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, November 28, 2007 at 4:51:00 PM
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» Color Zeitgeist and Lexical Clouds

From the on-line color thesaurus we can compile a list of top color name queries, color code them by their corresponding colors and rank them by relative frequency. This gives us a color zeitgeist for November of 2007. In this format it is easy to see that in spite of having hundreds of color names in its vocabulary, the most frequently queried color names are also among the most widely used - specifically red, blue and green are the top three most queried color names for users of the color thesaurus.

mustard
sand
sky blue
leaf
marine blue
spring
medium blue
mid blue
salmon
burnt orange
cerulean
dutch blue
maroon
peach
periwinkle
gold
grandma
gray
grey
indigo
rose
azure
crimson
navy
chartreuse
beige
taupe
ruby red
cherry
turquoise
crimson red
aqua
ochre
rouge
cyan
violet
white
puce
mauve
brown
teal
black
magenta
pink
orange
purple
yellow
green
blue
red

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Posted by Giordano Beretta or Nathan Moroney on Tuesday, November 27, 2007 at 3:56:00 PM
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» Fine art ink jet

The French magazine Réponses Photo just published its fifth special edition issue. It has a very interesting survey of ink jet printers for fine arts.

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Posted by Giordano Beretta or Nathan Moroney on Thursday, November 22, 2007 at 11:14:00 AM
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» "Nifty gadget from HP" and other feedback about the On-line Color Thesaurus


Over two weeks ago we posted the on-line color thesaurus to HP's external color blog. It's been interesting to look at how the tool was received, commented on and blogged about. This post tries to capture and organize some of my observations and feedback about the color thesaurus from the web. But first a big thanks to core77 for their most excellent post about the on-line color thesaurus.
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Posted by Giordano Beretta or Nathan Moroney on Friday, November 16, 2007 at 6:37:00 PM
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» digital photo workflow for the rest of us

Recently a colleague a few cubicles down showed me some prints he did on his HP Photosmart Pro B9180. I was impressed with the image quality and I am wondering if time is ripe for the rest of us to switch from AgX to digital photography. You get your print in just 90 seconds and as Ingeborg Tastl's fade simulator illustrates, the permanence and durability is excellent.

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Posted by Giordano Beretta or Nathan Moroney on Wednesday, November 07, 2007 at 10:35:00 AM
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» Photo permanence and durability

Experience your memory fading away.
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Posted by Giordano Beretta or Nathan Moroney on Tuesday, October 30, 2007 at 4:31:00 PM
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