38

This is moiré. It occurs because a screen is actually a grid of squares that are being used to make the image. When it ends up trying to be mapped to another grid of pixels (either by being captured by a sensor or by scaling) points of light or pixel data don't line up exactly. Some pixels get 2 pixels of information, some get the border between pixels. ...


23

Other users gave great answers about tuning your computer. However since you mentioned costco, this is a costco specific answer: I've sent many prints to costco and had great luck. However not so much, before I realized that they were "auto correcting" images. One batch of birth announcements I had to send three times because the color was "off" no matter ...


12

First Question If all colors are combinations of red, green and blue, and my monitor's pixels use all three, why is its color space limited to so small a portion of the actual complete color space? What colors are we not seeing and why? The answer to this question is (relatively) simple. I'm going to reference the sRGB color space (depicted below) since ...


9

As your existing (+1) answer says, it's a Moiré pattern. But you see it particularly when the image is scaled. You don't say what does the scaling, but I'm guessing you're just zooming the display, or pasting into Word/Powerpoint/etc., in which case you may benefit from scaling the image using a different method in the GIMP (free), Photoshop (expensive) or ...


9

why is its color space limited to so small a portion of the actual complete color space? Because the "red", "green" and "blue" which your monitor uses are pale, probably not noticeable but still pale. You would probably not be surprised if your monitor used distinguishably pale colours and was said to have small colour space. No matter how pale the "red", "...


8

Yes - you need to calibrate your monitor. One option, which is what I did, is to buy a relatively cheap colorimeter, at the time the Huey Pro was generally available. I used it as a travel colorimeter. Later, when I wasn't traveling as much, I bought a more expensive colorimeter (Lacie Blue-Eye Pro) for my home IPS monitor. I found that the cheaper ...


8

Yes, it exists and it is called pseudo-gray.


6

You are seeing the scanning of the screen. Try shooting an airplane propeller next! The exposure is made with a travelling slit so different parts of the image are exposed at different times and the movement causes artefacts. Even though the shutter is not mechanical, the reset and readout has the same effect, but more complex: while a focal plane shutter ...


6

When you work in 16 bits mode, the pixel data have 16 bits/channel, thus 65536 shades per channel. Your display has 8 or 10 bits/channel, thus 256 or 1024 shades per channel. The way you convert the source data to the display is by resizing the color space. You have different strategies called render intent. The more simple, the perceptive intent, is a ...


5

1) I have never seen any official information, but various people close to the LR development team indicated at numerous occasions that LR is internally using color space that they named Melissa, which has gamut of ProPhoto RGB, but different gamma. 2) No devices support entire ProPhoto RGB, but many, especially modern inkjet printers, exceed sRGB and even ...


5

In theory, this seems fine, but a cheap color calibration device gives you steps 1 and 2 already done, plus 3 done with many, many more samples than a color chart, and 4 done automatically. I'm willing to bet that inaccuracies in the first steps plus the limited number of samples add up to less-than-ideal results. With a "real" colorimeter costing under $...


5

Considering that an average monitor has about 6-bit per channel color depth (8 bit minus the dithering), I guess 10-bit is for color proofing/professional DTP/digital cinema. And higher than 8 bit per channel has another challenges: Video card: the video card needs to support color outputs more than 8 bits per channel. Considering that DVI supports only 8 ...


5

The question is very broad and probably beyond the scope of an answer here. Entire books have been written regarding points 1-5 of your question. It seems that all of that is really just a long preamble to what it seems you may be really asking: Why sRGB images viewed via the Chrome browser do not shift colors when I change the color space on my system to ...


5

Some high-end, made for visual-arts work monitors ship with pretty decent color profiling from the factory. But if you're looking for a cheaper option, you definitely need a color calibrator. There's no way to even get close to matching output without one. But note that you're only going to get kinda similar. Monitors and prints are inherently different. ...


5

You have already pointed out the exact reason this wouldn't be worth the effort of implementing. The slight tint shouldn't be noticeable. The minute differences in brightness wouldn't be noticeable either. For example, can you read the text in this image? It has two neighboring 8-bit grayscale values. If you can see it, it isn't your eyes... your ...


4

How are the extra pixels handled? By a process known as "resampling". Pixel brightness values are just samples of the pattern of light projected onto the sensor by the lens. Resampling means obtaining a new set of samples at different locations based on the original samples (the new set of samples in this case matching the number of pixels of the monitor ...


4

Well, if there was a magic RGB setting working for all monitors in the world, there would be no need for calibration anymore, now, would there? In order to bring your display to a given temperature, you would usually use a calibration tool like the ColorHug, Spyder, or Colormunki, for example. Those will be able to measure the light emitted by your monitor, ...


4

Taking an image "Outside" does not guarantee you D65 color temperature, unless measured. Also without having drivers adjusted to provide a D65 simulation on your monitor, the results can not be accurate enough to be called calibration. Even with the cheap calibration devices available it is difficult to sometimes get an accurate match between monitor and ...


4

If the problem only happens when scaling, then that means the scaling is bad. A simple/low quality algorithm was used and therefore the scaled image looks differently than the original. With a quality scaling this does not happen. It would help if you would make the original image available. What software did you use to scale the image? For a quick check ...


4

This type of monitor uses a cathode ray picture tube. This is a design taken from analog TV technology. The image on the screen is glowing pixels of red, green and blue phosphorus. In the neck of the tube is an electron gun. It fires elections aimed at the inside center of the tube. The exterior of the neck of the tube is wrapped with electromagnets. These ...


4

Your basic assumption: "If all colors are combinations of red, green and blue" is just wrong. Rafael says it works on humans, but this is also wrong. Let me answer this: "What colors are we NOT seeing and why?" Take the light coming from a low-pressure sodium lamp ("SOX"). It is made of two wavelengths at 589 nm and 589.6 nm, both have the same "amber" ...


4

Regardless, what tips could you provide to verify that your photos will look perfect on your screen when you are out shooting? You can't. There are several reasons why. There's no such thing as a perfect photo. Look at it close enough and hard enough and you'll find something wrong with every single one. Unrealistic expectations. Zooming in at 100% on your ...


4

To obtain consistent results, you should calibrate your output devices and use print services for which color-correction profiles are available. Dry Creek Photo provides ICC profiles for many Costco locations and other services. Rather than buy new equipment, consider calibrating and re-calibrating your current equipment, several times over several months. ...


3

As other answers state, the effect is called Moire. But why does it happen when you downscale or zoom-out? As prevoiusly stated Moire happens when two patterns interact, specially if the two patterns have a "frequency" (read size of the repeating characteristic) close enough to each other. What happens next is a mathematic relationship between the patterns, ...


3

1) Is it worth sucking it up and shelling out the dough for a calibrator, especially if don't print? Do these calibrators usually fix all issues like colors running hot and will my monitor be perfect after using one? Are they essential investments? Yes (a), no (b), yes(c). a.) As as serious hobyist it is key that the color you see while editing your photos ...


3

Why do you think your Macbook or IPhone & IPad has the calibrated screens or why are you trying to achieve those colors. As you have adequately put, you have did your research and bought the "best out of box color calibration and overall reviews for its class". Regarding your question, firstly you should use DVI, HDMI or even better DisplayPort port of ...


3

On the iPhone, taking the picture in HDR mode gives you a composite of three photos taken and low, medium and hi range. As a result you are likely to catch all of the pixels at least once.


3

Ok - I found a simple answer - I just need to press the Play button to reactivate the monitor.


3

Calibration with a hardware calibration tool (I use an X-Rite Colormunki) will improve display accuracy. Factory calibration may get the best out of the display using its internal controls, e.g. contrast, brightness, etc. However, for professional accuracy you also need to "profile" the display with a proper calibration tool. In simple terms, this measures ...


3

Color space has 2 words... Color and space. Color If all colors are combinations of red, green, and blue... Incorrect. That is a simplification that works on humans. Our eyes have receptors that use this kind of combination. That is the physiological component. More or less is that one type of receptors works with blue and yellow and the other with red and ...


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