Level auto option faulty
In preferences for Exposure, I have channel mode set to Red, Blue, & Green channels. When using the automatic option for curves, the result is incorrect. This option worked fine under the previous release.
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I assume you mean Levels not Curves? (There is no auto function for Curves.)
On Levels, it works fine for me. On the RGB option, clicking the auto (magic wand) button, brings in the lower sliders to the edges of the RGB histogram, with no movement of the sliders on the separate R, G and B channels. With Red, Green and Blue as the option, clicking it brings in the lower sliders to the (different) edges of the R, G and B histograms, with no movement of the sliders on the RGB histogram.
What is it you are seeing happen? In what way is it incorrect?
Ian0 -
I tried adding a copy of the image to this message without success. What I see is the setting points for white and black far inside the body of the histogram and the reference point for midtowns slanted left so the image is very dark. 0 -
I assume still that you mean the Levels tool, not the Curves.
So you start with an image with no Levels adjustment at all? (You could check that by going through the RGB tab, and the Red, Green and Blue tabs, and verifying that they are all set at 0 on the left and 255 on the right.) Also you have the Preference set to Red Green and Blue channels and not to RGB?
If I have it set like that, and use the Auto button on the Levels tool, I see the Red Green and Blue channels all change (by different amounts, because the histogram is different for each colour channel). On the RGB channel, I see the histogram change but I don't see the controls at the bottom move in from 0 and 255. Is that how it works for you too?
However, I have just tried this with another image, where I already had adjusted the RGB controls on the Levels to the edges of the histogram. I don't remember whether I had done that using the Auto function on RGB setting (which is the way I usually use it) or whether I had pulled the Levels in manually - I don't think it makes a difference. Now if I have the Preference set to the Red, Green and Blue channels, and use the Auto button, the sliders on the RGB channel do come in quite a way from the edges of the histogram. This is because the Auto Levels on the separate channels alter the histogram. It's not that the control handles move - I can watch them as I click the button and they don't move: it's the histogram that moves.
So if you are going to use the auto function on the separate Red, Green and Blue channels, it seems that it pays to make sure that there is no existing Levels adjustment on the RGB channel.
Ian0 -
This is a change from version 12. When I import images, I down automatic levels adjustment. After working on an image, I used to click on the automatic levels button just to make sure any changes I have made have not created a problem. Been doing this for a couple of years without problems until this release of C1. 0 -
CoastGuy wrote:
This is a change from version 12. When I import images, I down automatic levels adjustment. After working on an image, I used to click on the automatic levels button just to make sure any changes I have made have not created a problem. Been doing this for a couple of years without problems until this release of C1.
And have you always worked with the separate Red, Green and Blue, rather than the RGB channel? I don't think this behaves differently from previous versions, though I can't now easily check.
Ian0 -
I used to work with the RGB option. This past summer a friend told me about the individual channel option which I find produces a better outcome. I have been editing images from Ethiopia the past two months and I use the levels adj. on every single image so it was very obvious when the change occurred.
If I reset the level to the original state and then use the auto option, the point for the black setting is inside the histogram. I have tested this on several images and the behavior is consistent.0 -
A screenshot would be helpful. Post the image on an internet drive like Google Drive or Dropbox and share it. Paste the share link in a post here.
As Ian3 said, and I also use this option regularly, I did not notice any change yet, but you never know...0 -
Are you also using the HDR tool?
Are the images you are working on some that have previously been imported using V12 (or earlier)?
Grant0 -
I am not using the HDR tool. These images were imported using version 12 of C1. 0 -
I have posted two PDF files. They are both from the same image. One is before any level adj. is made. The other is what I see after selecting the automatic adj.
https://www.dropbox.com/s/jp9iro4n7g0q2jw/auto%20level%20chg.pdf?dl=0
https://www.dropbox.com/s/04ju67wn7hb579o/before%20level%20chg.pdf?dl=00 -
And this is with the Preferences set to Red, Green and Blue channels for the auto adjustments, not RGB?
If so, I can't get it to replicate the behaviour you are seeing.
Ian0 -
CoastGuy wrote:
I have posted two PDF files. They are both from the same image. One is before any level adj. is made. The other is what I see after selecting the automatic adj.
https://www.dropbox.com/s/jp9iro4n7g0q2jw/auto%20level%20chg.pdf?dl=0
https://www.dropbox.com/s/04ju67wn7hb579o/before%20level%20chg.pdf?dl=0
OK, this is interesting.
From the screenshot, I can see that the channel mode is set to the separate Red, Green, and Blue channels. However, the auto levels affects the combined RGB channel. That is obviously not good.
Are the separate channels still in their default non-adjusted position or adjusted as well? That is for my curiosity.
This is one you should report.
Oh, I can not replicate this, same as Ian3.0 -
The separate channels are in their default position. The white & black are in the original 2 & 255 positrons with the midtowns in the center 0.00 position. I am pretty sure this is different behavior than what I remember from version 12.
When I set the background layer to the as shot condition and create a new filled layer, I can play around with various options and monitor the changes easier. Changing the channels back to the RGB setting and restarting C1, it does look better.0 -
CoastGuy wrote:
The separate channels are in their default position. The white & black are in the original 2 & 255 positrons with the midtowns in the center 0.00 position. I am pretty sure this is different behavior than what I remember from version 12.
OK, thanks.
Yes, that is different than in 12, but I add that my auto levels in 20 works as in 12.0
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