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by Rodrigo

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Color is the human perception of light as having different hue, from reds and oranges, through yellows and greens, to blues and violets. Color is a fundamental aspect of the arts and photography.

learn more… | top users | synonyms (1)

8
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10answers
2k views

Do photographers see ambiguity in the color of the blue/black (gold/white) dress?

Okay, so, this has taken the Internet by storm today... You've probably seen it and lots of commentary. Apparently, many people see this as gold and white; to me, it's unambiguously blue. There are ...
2
votes
1answer
103 views

What is the native color gamut of a modern digital sensor?

What is the area of CIE 1931 diagram that is being covered by contemporary digital camera sensors? I can find triangles for LCD panels being comapred to sRGB and aRGB and ProPhoto. There are always ...
29
votes
7answers
2k views

Why are there no dark yellows, or bright violets?

In his book The Photographer's Eye, photographer and author Michael Freeman says: Another consideration is relative brightness. Different hues are perceived as having different light values, with ...
1
vote
1answer
65 views

How can I convert a photo to a fixed palette with pre-defined weighted color proportions?

I am creating a physical mosaic from a photograph, where each mosaic tile will correspond to a pixel of the (scaled down) original picture. The problem is: my tile color selection is limited, with the ...
2
votes
2answers
119 views

Does the right calibration temperature for my monitor depend on season?

I just bought X-rite calibration kit but one thing makes me curious. Should I set colder white point (6500K) for summertime and warmer (5000K) for winter? Will global warming cause atmospheric effects ...
2
votes
1answer
107 views

Effective viewing of Margulis' latest tome

I just got Modern Photoshop Color Workflow by Dan Margulis, and it appears to be self-produced and only available from him (via Amazon or other brokers, though). Given the subject, I suppose he has ...
0
votes
0answers
42 views

Batch saving images with reduced colors

I'm trying to record and run a macro in Photoshop that saves images as PNG with just 8 colors. Recording the macro, I save for web, select the options I want, and hit save. But when I play back the ...
8
votes
2answers
449 views

Does lens age affect color produced?

I came into some discussion with my friend, and my friend said that age may affect the color produced by the lens, i.e., a newer lens produce better color than an old lens (of the same model). Is this ...
-1
votes
1answer
84 views

What is the easiest color to see on black and white?

Not exactly photography but somewhat related due to picture editing.. What is the easiest color to see whether it's on black or white?
3
votes
2answers
3k views

Why are Curiosity Mars rover photos black and white with huge white border?

Bellow is the first actual-size photo of Mars taken from the NASA's rover "Curiosity". On the NASA's website you can see other images. Despite the fact that the planet's photos are fascinating, they ...
2
votes
3answers
290 views

How to save large photos with web safe colors?

When I'm done in photoshop I always use save for web to take care of color management so it looks the way I want in the jpeg, but it won't let me save photos any larger than 8191 pixels on a side, ...
0
votes
0answers
51 views

What is this style of photo editing called? [duplicate]

And how can one achieve it? Any tutorials etc? More examples here: https://www.flickr.com/photos/altrieri
2
votes
2answers
54 views

Why can I see beyond sRGB in CIE Chromatic Diagram

According to CIE 1931 color space chart, the sRGB gamut is what's inside the triangle: As you can see from the diagram, blue is shown outside the sRGB gamut (at about 460 nm wavelength). Knowing ...
3
votes
1answer
189 views

Is there a name for the style of putting a strong color gradient over a photograph?

A common trend I'm seeing a lot of is to put a strong color gradient over a photograph to create an attractive background. I'm not talking about slight color tweaks that instagram does, but instead ...
5
votes
5answers
9k views

How can I take selective color pictures with my Canon T1i?

I want to select a certain color using my camera so only that will be recorded as color, with all the rest in gray- or b/w-scale. Meaning, only one color and its shades appear colored, and rest is ...
6
votes
3answers
1k views

Color film comparison: How does Fujifilm Superia compare to Kodak Portra?

I am a newbie to color analog photography. So far I have only use B&W films. Specifically, I prefer Ilford Delta 400, Kodak Tri-X and Ilford 3200. My camera is Pentax ME Super. I am on the big ...
-1
votes
1answer
47 views

Source for colored Wratten filters?

I need 13 different Wratten gelatin filters to use in some research in anatomy and I need a specific spectrum of light filters. I need #'s 3, 9, 15, 16, 21, 24, 25, 29, 44, 53, 58, 98, and 31 or 32. ...
1
vote
0answers
31 views

What can cause yellowish horizontal bands when using a relatively high shutter speed? [duplicate]

I'm using a Canon 6D, using my Canon 50 mm f/1.8 lens. I was taking pictures of my son using his "youpala" (no idea how you say that in english :D) last night, in my kitchen, with only my ceiling ...
5
votes
3answers
655 views

How do I get accurate color when taking a photo of an LED?

When I'm taking a photo of a LED diode (turned on), it appears to be brighter than it should be and its color is false. For example, red diode looks pink. I have tried changing white balance or use ...
-3
votes
1answer
157 views

What kind of filters might have been applied to these photos? [closed]

Neither of these is mine (obviously, since I'm asking), but I see both effects quite frequently as of late. I'm trying to figure out the nature of them. Can anyone make a guess as to what kind of ...
0
votes
2answers
96 views

Color spaces for large prints / and or web

I am using a MacBook Pro (2011) and edited a photo from camera raw into photoshop. The color space is set to sRGB within photoshop. I used Lightroom to export to JPEG while ensuring that the color ...
1
vote
2answers
427 views

How to calculate mean/average photo color in GIMP?

How to calculate mean/average photo color in GIMP? I have some photo and want to calculate average color - how can I do it?
9
votes
4answers
66k views

How do I select all pixels that match an exact color value in Adobe Photoshop?

Is there any way to select all pixels on the current layer that match a specific color value exactly? My first instinct is Select > Color Range..., but I cannot determine how to input a specific ...
4
votes
4answers
167 views

Map R+G+B+infrared to R+G+B?

A photograph that includes color beyond the usual visible spectrum can be constructed by "overlaying" the image from a conventional camera with that from an infrared (or ultraviolet, or x-ray) one. ...
5
votes
4answers
348 views

How can I reduce the effect of sodium vapor street lights in night photography?

I would like to light buildings at night using torches etc. How do I reduce the sodium light (street light ) that is cast on it. Can I reduce it with a filter and if so which one?
2
votes
3answers
89 views

How to view the gamut of my printer?

I'm recently unsatisfied with my prints from my printer Epson 3880. The color is simply out of gamut of my image (flowers with vivid colors). I checked with different ICC profiles in color sync and ...
5
votes
2answers
1k views

Why are red objects coming out unnaturally in my photographs?

I have observed lately during my shoots that when I try to capture a red object with hardly anything in the background, the color doesnt seem to come exactly as what it is in reality. With flash or ...
5
votes
4answers
215 views

What is the difference or relation between a Color Model and a Color Space?

What is the exact relation or difference between a color model and a color space? I find these two terms to be used interchangeably in some literature. Are they simply the same? Thanks!
1
vote
0answers
188 views

Canon 6d color noise (and compared to 50d)

my first day with 6D, upgraded form 50D. Wouldn't be pixel peeping but something unusual caught my eye when I opened photos in Lightroom this morning. The color noise pattern is completely different ...
1
vote
2answers
115 views

CIE Chromatic Diagram explainment

The MacAdam Ellipse is applied in the CIE Chromatic Diagram. I understand that humans distinguish some colors better then other colors (that's why the shape is eliptic / a horseshoe / inverted ...
3
votes
5answers
629 views

Why do my Nikon NEF raw files come out with a green tint when converted with Nikon or Adobe software?

I have a Nikon D5100 and I have converted my NEF files to JPEG using the Nikon software "NEFCDC". The pictures got converted, however, they developed a green tint in them. Please help me out ...
9
votes
4answers
1k views

Why are gels used for digital photography?

What is the purpose of color-adjusting light sources with gels in digital photography? Are they reserved exclusively for scenarios in which one wants different colors from different lights? I assume ...
2
votes
1answer
77 views

Do I have to do camera calibration every shoot?

I bought a xrite color checker export. I understand that for white balance, I'm suppose to shoot the card every shoot. Because the whitebalance is different in every environment. But what about ...
4
votes
2answers
2k views

How to properly color calibrate a 27 inch iMac monitor (OS X Mavericks)?

We have a 27" iMac monitor and want to know how to color calibrate it (and with what recommended product) We are looking for someone who has actually done this.
4
votes
4answers
4k views

Why is wrong color coming out of my Rebel T3i?

I'm not a professional at all but bought a Canon Rebel T3i to capture life's moments. The color of my shots are way far off; ie., my sons navy blue and white baseball uniform comes out bright green ...
6
votes
2answers
402 views

Why can't one calibrate a monitor with a DSLR & a color chart?

The idea is simple: Take a RAW photo of a real color chart outside to get a white point of D65. Use that to get an accurate color correction matrix for the camera sensor. Use the same camera to ...
12
votes
7answers
832 views

How to set tint if one is colour blind?

How should someone with red-green deficiency in colour vision set tint in Lightroom or other post-processing tools?? Are there any external tools (other than asking someone) that say whether white ...
69
votes
6answers
14k views

Do fluorescent lighting and shutter speed create a problem with color cast?

I took a bunch of photos at my son's martial arts club using a D90 with a 50mm F1.8. The club is lit with overhead fluorescent lighting, and I was getting some weird results where some shots are ...
3
votes
0answers
93 views

Per-Application Color Management under GNOME3

I have recently used DispcalGUI and a Spyder4 to calibrate my monitor. I have selected the resulting calibration profile with the GNOME setting manager. However, instead of making my workflow more ...
10
votes
3answers
4k views

What is the difference between black and white film and color film?

What is the difference between black and white film and color film? How does color film record color? Is it like black and white film with something more, or is it entirely different?
9
votes
5answers
2k views

What's the difference between colour space and bit depth?

I know that there are different types of colour space and that sRGB is the most common. Bit depth defines the variations of a colour channel, where (I think) 8 and/or 16 bits are the most common. ...
3
votes
1answer
194 views

Human perception in color mixing

Look at this image: 50% of its pixels are blue (0, 0, 255), 50% of its pixels are yellow (255, 255, 0). When I look at my computer display from a distance where I cannot distinguish the ...
4
votes
4answers
114 views

How to calibrate colors from photos for classification purpose (ICC profile)?

For a scientific study, I have to classify pictures of crop canopy in two classes: vegetation / soil. These picture are taken at several places, different times and date. The idea is to use the same ...
0
votes
0answers
44 views

How to create different color effects with gimp? [duplicate]

How can I make images look like those in Gimp, how can I play with colors? What tools or approach should I take?
7
votes
4answers
10k views

Does Gimp have a Match Color function similar to that in Adobe Photoshop?

In a recent question, Steve Ross points out that Adobe Photoshop has a useful feature for matching color between photographs. Of course, color adjustment can be accomplished in Gimp with careful use ...
1
vote
2answers
344 views

Embedded jpegs in NEF raw files

I open a .NEF image from my Nikon D80 in the Windows Photos app (the modern/"metro" style app). I then zoom in, and it re-renders or something to display higher resolution, but the colours become less ...
17
votes
2answers
854 views

Why do I see this yellow color shift at high ISOs and fast shutter speeds? [duplicate]

I recently purchased a full-frame DSLR with a reported highest ISO of 204,800. I’m intrigued by the possibilities of the high ISO range and how far Lightroom and Aperture (I use each of them) can ...
4
votes
4answers
1k views

CMYK vs RGB - Can a DSLR take CMYK images?

I seems that all cameras take photos in RGB format and printers take photos in CMYK format. If the photo is not in CMYK, then the printer converts it to that format with some loss of quality. Can the ...
6
votes
3answers
1k views

RAWs looking massively different in Aperture/Mac OS Preview compared to camera preview and (Canon) PictureStyleEditor

Yesterday, I have been shooting photos at a christmas market -- especially a band that played there. Since everything happened in the evening and it was quite dark, I thought using RAW instead of JPEG ...
22
votes
4answers
1k views

Is the Zone System useful with a DSLR?

The Zone System was originally used with B&W film photography. With colour digital photography, though, couldn't you get much the same results by keeping an eye on the histogram? I think I might ...