Download Match Colors Ai ~UPD~
Ecio Rassin
My old DSLR has a completely wonky color correction balance from one picture to the next. For example the two attached images, one 5147 is much too red, then 5150 is perfect. Since some of the same items are visible in both images, is there a way to get Photo to tell you what correction are needed, to make for example the colors of the apron, shelves or something else from one image match another ?
I have a Nikon camera at the moment and i like it a lot. Except for one thing. The colors always seem a little off to me. A little yellow and it's an ugly yellow. It's not a white balance thing and it's not my monitor and recently i tested some raw's from the Sony A7R II. That to me appears to have a nicer white balance right off the bat and the yellow look nicer. Sunset colors have a nicer warmer yellow. Skin in the sunset look nicer. So my question is. Given a nikon and a sony of comparable performance ( say the 36 megapixel sensors if that's even important ), can you output similarly colored jpegs from the raw files ? Can you match the colors just by tweeking on the raw files ? Can you make the nikon's yellow nicer ( just playing with the white balance ant tint is not doing it for me. warming the yellows yelds what i consider to be ugly yellows ).
For straight out of camera matchups, you need to read your camera's manual. with some cameras it is possible, with others, no. Yet again, with some cameras there are ways to get the two cameras closer in color performance. But your options are in the manual.
On the other hand most editing software has the ability to change the settings on photos and then save those settings as "presets" that can be applied to all photos at will. You could take 2 or 3 photos from your Nikon, and and adjust the colors to your satisfaction, save those settings as a preset, and apply those settings to future photos.
So my question is. Given a nikon and a sony of comparable performance ( say the 36 megapixel sensors if that's even important ), can you output similarly colored jpegs from the raw files ? Can you match the colors just by tweeking on the raw files ?
A Raw file doesn't have colors. It's just sensor data. Color is created by the software that you use to process the Raw file, guided by its understanding of the characteristics of the color filter array on the sensor, and of course by any adjustments you've selected.
In any case, if you want to get the most accuracy possible, ideally you need to shoot the chart for all cameras under the same lighting. Pull everything out at once and take the time to shoot it all in one go. That way conditions are as close as possible. Also, if you have the option for dual-illuminant profiles use it. That will give you a greater range of correction since it allows you to use two lightsources as a reference instead of one. For general use, I take one sample in standard daylight and one under a 60w incandescent bulb, then build the profile off of that. For special situations, you can create a custom profile for a specific lightsource, but that's not so much for matching camera output to each other as it is for simply getting accurate color for a given light source.
Also, as mentioned above, even if you calibrate your cameras this way, nothing is absolutely a perfect match. You will likely get very close - closer than with other methods - but there will always be some variation, sometimes noticeable and sometimes imperceptible. Still, it's about the best that can be expected, and at the very least it will get you close enough that any variation can typically be tweaked into place using your PP software and its editing tools.
There one other thing i've noticed while playing around. I was playing with raw files form d810 and sony a7rII. photos were shot at the same time in the same place and i was doing all kinds of stuff to try and match the warmness of the sony. So i turn the whiteballance all the way to warm and ofcourse the photos were all yellowish and stuff but the nikon yellow was still ugly and greenish somehow while the sony yellow was just fine, warmer and more plausible to my eyes. I did like that. It's true that the Nikon raw was processed directly with lightroom and the camera standard profile while the sony was converted to dng with adobe's dng converter and then brought into lightroom but nothing i did (including trying out all the profiles for the nef, including the ones generated with colorchecker) to the nef could match the color of the arw. I would like to mention that i'm not striving for matching the exact scene over here, i just want the warm sunset mood. messing around with individual color saturation luminosity or hue seems to mess up the photo. Could it be that some raw models just can't be molded in such a way that you obtain certain colors ?
and i was doing all kinds of stuff to try and match the warmness of the sony. So i turn the whiteballance all the way to warm and ofcourse the photos were all yellowish and stuff but the nikon yellow was still ugly and greenish somehow while the sony yellow was just fine, warmer and more plausible to my eyes. I did like that. It's true that the Nikon raw was processed directly with lightroom and the camera standard profile while the sony was converted to dng with adobe's dng converter and then brought into lightroom but nothing i did (including trying out all the profiles for the nef, including the ones generated with colorchecker) to the nef could match the color of the arw. I would like to mention that i'm not striving for matching the exact scene over here, i just want the warm sunset mood. messing around with individual color saturation luminosity or hue seems to mess up the photo. Could it be that some raw models just can't be molded in such a way that you obtain certain colors ?
Yeah, it is more of an art than a science in a lot of ways, and having only 18 colors to calibrate is hardly enough. Also, there is a certain irreducible and uncorrectable component to color rendering among models of cameras, and of course the lighting used will make a difference.
Be aware, the Color temperature and Tint values are reversed-engineered for each camera model, and so will not match between cameras, even if both cameras have a perfect neutral white balance. Also, lenses tend to have a bit of color to them also, which will throw off white balance a bit.
The Aura Carver 10.1" HD Digital Frame is a great way to put your portfolio on display and a great way to surface forgotten memories. The colors are vibrant, and the build quality is solid, but the Carver isn't without a few quirks.
First of all - color mode isn't interesting. What matters is the color profile - sRGB, Adobe RGB, US Web Coated, FOGRA39 and so on. The same numbers will yield different colors according to profile, and vice versa. Always think in terms of icc profiles!
Third - there's a subtle difference in the CMYK policies: Illustrator's default is to preserve numbers. This is common good practice for preserving K-only overprint content on press; otherwise it will be converted into 4-color black. But it may change colors.
Also my theory on the monitor profile for those PS eyedropper values on windows outside Photoshop may be wrong - I just switched around the monitor profile which changed the visible colors but not the measured numbers.
At least we now understand what it is doing - and it explains why I saw that the AI eyedropper was matching the Photoshop eyedropper used out of the Photoshop window (i.e. reading the screen). Although why Illustrator would read values converted to monitor profile in a placed layer I have no idea
Having your colors come from another column in the data frame runs the risk of things not coming through in the right order, as happened when I ran your code as it is. The tissue gets mapped to color in a certain order, either based on factor levels if it's already a factor, or in alphabetical order if it isn't. But df$color_code will just be a vector of colors, and will assign colors in the order they appear. So with your code as it is, I'm getting the light yellow color placed with "brain" instead of "nerve" because of the mismatch between this ordering.
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