Timeline for Accurate Product Images: Gray Point, White Point, Black Point
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 27, 2016 at 15:24 | vote | accept | ptmr.io | ||
| Sep 27, 2016 at 13:54 | answer | added | ptmr.io | timeline score: 1 | |
| Sep 27, 2016 at 13:12 | answer | added | RyanFromGDSE | timeline score: 0 | |
| Sep 10, 2016 at 10:33 | comment | added | ptmr.io | @KelSolaar while this method somehow works, you would have to overexpose while shooting by 1 stop then add about 66 white and black. Looks similar to setting white/gray and blackpoint in photoshop curves. | |
| Sep 10, 2016 at 9:47 | comment | added | ptmr.io | @KelSolaar your comment is very helpful. It really seems that this default tone curve pushes the highlights way too far which then leads to this luminance effect. I will adjusting the tone cure with help of the post you mentioned. But this leads me to one more question: wouldn’t a color profile with a Color Checker Chart like mentioned above also lead to a similar effect? | |
| Sep 10, 2016 at 8:54 | comment | added | Kel Solaar | Adobe Camera Raw and Lightroom apply by default a tone curve to your images for better presentation and rendition ( docs.google.com/spreadsheets/d/…) This will get in the way of any precise and controlled adjustment you might want to perform as their effect will be highly non linear. This post should be of interest for what you are trying to achieve: triplegangers.com/index.php/blog/cat/technology/post/… | |
| Sep 10, 2016 at 8:34 | history | edited | ptmr.io | CC BY-SA 3.0 |
added example image of gray card, corrected grey to gray
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| Sep 10, 2016 at 8:31 | comment | added | ptmr.io | @null I already considered this method with e.g. the xrite ColorChecker Chart. It creates camera profiles. However it should be also possible with a normal gray gradient chart. My Question is more about why Lightrooms White/Black sliders fail although they sound to be the technically correct solution. Also I don't think the Color Profile Method actually adjusts b/w points as Camera Calibration Profiles in Lightroom generally don't do this, afaik. | |
| Sep 10, 2016 at 8:09 | comment | added | null | I've seen it that some cards come with a software that can be run as a plugin that analyses the image with the card and creates the adjustments automatically. | |
| Sep 10, 2016 at 7:04 | history | asked | ptmr.io | CC BY-SA 3.0 |