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by Bart Arondson

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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.

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29 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 ...
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1answer
43 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. ...
5
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3answers
458 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 ...
0
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2answers
73 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
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2answers
164 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?
4
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4answers
148 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
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4answers
237 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?
6
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3answers
468 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
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0answers
152 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
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2answers
88 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 ...
2
votes
3answers
72 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 ...
9
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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
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1answer
73 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 ...
6
votes
2answers
255 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 ...
2
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0answers
76 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 ...
3
votes
5answers
328 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
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5answers
1k 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
163 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 ...
0
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0answers
43 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?
1
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2answers
233 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 ...
4
votes
4answers
88 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 ...
17
votes
2answers
829 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 ...
5
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4answers
199 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!
4
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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 ...
4
votes
3answers
608 views

How can I capture the true colors of my reef aquarium?

I have a canon EOS T4i with stock EF-S 18-135mm f/3.5-5.6 IS STM lens, a Rokinon 35mm f/1.4 Lens, and a Sigma 150-500mm f/5-6.3 DG OS HSM APO lens. I'm trying to photograph the various corals in my ...
1
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2answers
308 views

How can I whiten my background, without whitening the subject or modifying subject colours?

If I take portraits against a white background I like to use a colorchecker passport to ensure that my subjects come out at the end of my workflow looking 'true to life'. The problem is that due to ...
4
votes
2answers
1k 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.
2
votes
3answers
260 views

How can I get the colors right in this indoor architectural photo?

I am trying to take a photo with precise colors. I am not sure what am I missing so I could get similar colors. Here is the result that I would like to achieve: ) This is the photo that I took: ...
10
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1answer
430 views

What special properties does 18% gray color have in photography? [duplicate]

I keep seeing 18% gray color backgrounds being used in different areas of photography. What's special about it, why 18% and not 17 or 19?
0
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2answers
59 views

Display Color profiles: changing only yellow

How should I set parameters of color profile to change only yellow color output (right now I've got #FFFF00 displayed as #B4B400). Other colors must be left untouched. So I cannot just move Red and ...
2
votes
3answers
204 views

Do colors in photographs depend on ambient temperature?

My friend, previously a photographer, said that if you are taking photos in cold weather the photo is more blue (as if a slight blue filter has been applied). Inversely, taking photos when it is warm ...
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1answer
149 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 ...
14
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1answer
466 views

Why do pictures of fire come out purple?

When I'm taking pictures of my log fire the flames and embers come out in rich shades of purple rather than red. I've tweaked everything I can on my camera; white balance, metering, ISO, exposure, but ...
0
votes
6answers
209 views

Does the subject's face have too much red tint?

I took the attached picture with an iPhone 4, outside around 5pm, which was close to sunset. Does the subject's face have too much red tint? If yes, how would I fix this?
4
votes
3answers
446 views

How can I improve the dull colors in my product photography?

I try to shoot some pictures of apparel, lingerie, cometics on a white fluffy rag or a white paper board with a Canon EOS Rebel T2i + a Canon - Speedlite 270EX II External Flash on a tripod in day ...
4
votes
4answers
374 views

How does low-light conditions affect color quality?

I recently photographed an event that took place while the sun was setting. The quality of colors seem to deteriorate as it gets darker. The scenes were well-exposed as the ISO changed from ~1200 to ...
2
votes
1answer
1k views

How to Color Grading look like this?

I found a photo from Flickr The tone of photo seem like a japanese natural style (eco friendly). Highlight mostly green and add some Faded. How do I create this color grading in Photoshop. I, ...
7
votes
2answers
313 views

Why don't mainstream sensors use CYM filters instead of RGB?

From what I understand most digital cameras have a sensor where each pixel-sensor has three sub-sensors, each one with an R,G and B filter. RGB is obviously the more fundamental colour model since it ...
0
votes
1answer
236 views

color errors in dark areas - canon 700d/t5i

yesterday I bought an Canon EOS 700D with kit lens 18-55 STM. On my test images I encountered green "clouds" on dark areas. Is there a name for this kind of error and does it originate from the lens ...
6
votes
2answers
711 views

How can I get the colors in my photo to look like a painting by the Dutch masters?

I am trying to make pictures look like paintings. I am interested about reaching a similar color grading. This is an example: link I'm asking an opinion about what kind of techniques should I ...
1
vote
3answers
298 views

How does the spectral sensitivity of different sensors affect the resulting photo?

I am learning about light and color formation but I don't understand how does the sensitivity affects an image. Take for instance the different sensitivities for two "cameras" for each RGB channel ...
2
votes
1answer
63 views

Reducing color balance errors across multiple cameras

I'm an electrical engineer, but I thought I'd ask this in the photography section to get some more insight from experienced photographers. I am designing a system which will stitch images taken by ...
4
votes
2answers
223 views

What does 'freedom of color from white or gray' mean?

The dictionary entry for the word chroma says, "the purity of a color, or its freedom from white or gray." What does that statement mean? What is color made of? What causes color? I was reading this ...
12
votes
8answers
684 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 ...
3
votes
3answers
794 views

How do I create this soft and bright effect?

This is my favorite look for photos, and I've been trying to achieve this for some recent family vacation photographs. What is the process? Here are some links to some examples: ...
2
votes
5answers
404 views

Is it possible to increase digital color depth via interpolation?

I have a set of photos that where scanned at 8 bit color depth. Is it possible to increase the color depth digitally? I realize just increasing the color depth would gain me nothing unless it also ...
3
votes
1answer
209 views

What's an easy way to batch assign (not convert) an ICC profile to .JPG and .CR2 Canon RAW files?

All of the files that comes out of my camera (Canon Rebel T3i) are not assigned a colorspace. Instead, all files the format IMG_XXXX.JPG/CR2 are implied sRGB and _MG_XXXX.JPG/CR2 are implied Adobe RGB ...
2
votes
1answer
205 views

multiple pictures give different shades for same scene and lighting

I am photographing an object 4 cm away from the camera using 5MP phone camera. It is being used in macro mode with fixed ISO 100 setting. Automatic White balance is being used along with ...
11
votes
4answers
903 views

Why does the red area in this photo look very un-natural?

I was looking through some photos I took at RAF Cosford a few weeks ago, and noticed this big red area (it's a large door surround on the floor below) In the photoshop RAW preview, it looked almost ...
3
votes
4answers
348 views

How does one do light painting with in focus subject? Maybe a composite?

I understand and have tried some rudimentary light painting, but I'm still not sure how one might achieve something like the photos here: http://www.modelmayhem.com/portfolio/pic/18221422 Is this ...