Photoshop :: Shadow / Highlights Algorithm Changed Since Version CC
Oct 7, 2013
I usually use feature to bring details out from shadows. I worked very well for me but it seems the way the function works was changed in Photoshop CC,
For example, shadows sliders always made dark areas brighter before but in CC the areas often become darker instead (like in attached picture, decreasing radius doesn't make it brighter). Explanation of mechanism behind the new Shadow / Highlights function.
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Oct 4, 2012
I downloaded and installed the 13.0.1.1 patch for PS Windows but the about box still shows version 13.0.1. Did something go wrong or is this normal?
Moreover, contrary to what is announced in the forum header message, using the Help | Updates menu doesn't trigger any update. The 13.0.1.1 update is only available from the Security certificates updates page.
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Jun 4, 2013
9.0 CS2, but it is not so important, because the questions are fundamental.
Gradient Overlay
1. Look at the gradient settings scale. Why gradient isn't stopped at the second opacity stop and go on till the edge of the settings scale? After all, following the logic it’s the opacity stop and the gradient filling have to be stopped at it. That is to say If the logic of gradient algorithm is next. Filling begins from the left edge of the settings scale and stops at the first opacity stop(this filling is initiated by first markers). Then it continues since first markers and stops at the second opacity stop(this filling is initiated by second markers). But in practice filling continues since second markers also, though there is no third markers which initiate it.
2. Why second markers are necessary(they can’t be deleted)? I can suggest if second markers would be deleted and the first would be moved to position of the second, we would got the same gradient preview. Of course if the filling begins from the left edge and is initiated by the markers as I wrote above.
3. User color – you can set fixed color, which you can choose for the future in a dialog window. The window can be called via click to the pointer near the color icon.
When I click the pointer I see only one window where are three text items – foreground, background, user color. All is clear about foreground and background, they are set in two squares in the tools palette. When I choose “user color” there is no any window is appeared which have to contains at least current user color icon, color picker window, and buttons that allow to tune and apply user color: “set as user color sample” for picked color, “use user color sample as user color”. So how I can tune and choose user color?
Gradient:
4. I use gradient tool from tools palette. I spent it since canvas top edge till guide line. What is the gist of spending it for a specific distance? Why the color of first color stop fills the space till the guide line changing and stops at some light blue. And then monotonically fills with it all distance from guide line till canvas bottom and have no any opacity changes at bottom. Although it have to have some opacity changes because them present in the end of gradient settings scale.
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Mar 1, 2013
I read an interesting technical article today about the development of JPEGmini algorithm, that supposedly will provide lossless compression, and can be read by any current software that reads a jpeg file. THe article is rather technical, but that is good, as it sounds like a real deal rather than a magic concept. Give it a read and post your comments on JPEGmini. URL....
Here is a couple of excerpts:
Q: How does the JPEGmini algorithm work?
A: The algorithms we have developed, on which we have filed 14 patent applications, simulate the human visual system. Our technology analyzes each specific photo, and determines the maximum amount of compression that can be applied to the photo without creating any visual artifacts. In this way, the system compresses each photo to the maximum extent possible without hurting the perceived quality of the photo.
Q: How much compression does JPEGmini enable?
A: Our technology can reduce the file size of photos by a factor of up to 5x without hurting their quality. The amount of compression that our algorithms apply varies from photo to photo as mentioned above, but you can estimate the average amount of compression according to the photo resolution, as described in the following table:
Photo Resolution Average File Size Reduction Using JPEGmini 8MP and more70 – 80%5-7MP60 – 75%3 MP50 – 60%2 MP30-50%1024×76825 – 35%800×60020 – 25%640×480 or less10 – 20%
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Mar 30, 2009
I was wondering if anyone was familiar with algorithm used to Color Balance.
I'm interested in automating a process which includes Desaturating and then Color Balancing.
I solved the Desaturation (take the highest number of R G B, divide by 2, apply to R G B values of pixle.)
I am curious to know how a pixle would be modified by say, +100 Blue in Lows/Mids/Highs
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Aug 13, 2012
I'm trying to implement some effects in C++ for my user interface controls. I've figured out that Photoshop Layer Styles uses an anti-aliased form of the Euclidean Distance Transform for "Precise" techniques (Inner Glow and Outer Glow).
But what is the method used for the "Softer" technique for Outer Glow and Inner Glow? It seems this is also used for the "Smooth" technique when computing the height map for Bevel and Emboss.
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Feb 13, 2013
How to write an algorithm for triangulation in surface modelling ( using Delaunay's method) ?.
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Aug 6, 2013
I think circle after reduce using mask should stay circle instead of you can get in photopaint.
Steps:
1. make 10px circle
2. make mask from it
3. reduce mask by 3px
4. crop object to mask
system configuration:
Win 7 Pro 64bit, Intel i5-2500, 8 GB RAM, 128 SSD SAMSUNG + 2TB on hard drives.
corel version:
X6 VERSION: 16.4.0.1280
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May 22, 2013
I'm thinking about switching to the DNG-Format for the RAW-Files taken with the Fuji X-E1.
When the initial RAW-Conversion for this file type was recently replaced by a much better one, my RAW-Files were automatically updated. I wonder if this would also have happened if I had saved my RAWs under the DNG-format.
Or, in other words, does a DNG include all the data from the original RAW allowing it to be reprocessed when a better technology is available ?
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Feb 26, 2013
Is it using the same choices as Photoshop (Bicubic Smoother for enlarging, Bicubic Sharper for downsizing)? There are times when I prefer to use Smoother even when downsizing, as the Sharper algorithm results in over-sharpening (to my taste), but there does not seem to be a way to choose a specific one. Are there any workarounds for the lack of choices in the Export module?
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Aug 11, 2013
I have a database containing more than 5000 parcels. each parcel have its set of points with their labels, and for each parcel I have to generate a drawing. Is there an algorithm for placing point labels inside the polygon of the parcel with minimum overlapping ?
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Sep 9, 2012
In the Print Module, with the Print Resolution box left unchecked, how does LR choose the ppi that will be sent to the printer? I realize that it is using an algorithm to choose a ppi.
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Jul 24, 2012
It's a common practice when building layers to duplicate existing layers as a start. Additionally, it is good practice that layer names be meaningful.
Suppose I start with the following layer: layer 1
If I duplicate that layer, it seems reasonable I'd get: layer 2. Instead I get: layer 1 copy
Then if I duplicate again I get: layer 1 copy#1, even though this is copy #2.
I propose the following: An option be available whereby user is queried for name of any layer which is to be generated. This is easier than having to edit automatically generated layer names.If automatic layer names are to be generated, code first checks if previous layer name ends in a sequence of digits. If yes, then these digits are incremented as an integer until a unique layer name is generatedIf the layer name does not end in a sequence of digits, then "#1" is appended to the layer name, and the "1" incremented until a unique name is generated.
So with this algorithm:layer 1 would become layer 2 for a first copy, then layer 3 for a second copy, etc.background would become background#2 for a first copy, then background#3 for a second copy, etc.
The problem with using "copy" in the layer name is that it is probably only in the substantial minority of cases that the newly generated layer is destined to be a true copy, so the automatically generated layer name is very likely inappropriate. Better is to use a simpler, shorter name which applies in a greater fraction of the applications.
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Apr 12, 2011
I don't know if this problem was already there in earlier 3ds max versions, but i cant find anywhere on the internet how to create a shadow on a invisible plane like matte shadow could :
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Nov 11, 2004
I can't get Ctrl + Alt + ~ keyboard short cut to work which selects the highlights in an image. The problem is that on my keyboard I have to press Alt Gr to make ~ so can't use Ctrl + Alt + ~ . How can I change the short cut? I know that you can select the highlights by "Select -> Color Range.. -> Highlights" but the result is not as soft as with the short cut. Are there any other ways to select the highlights?
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Feb 25, 2006
I have taken a photograph with land in the foreground and sea in the middle and far ground.
I was shooting into the sun and sea has too many highlights on it.
What is the best way of reducing the intensity of these highlights.
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Jan 8, 2005
In analog photography, various soft focus filters will create a glow in the highlights, without blurring them (a slight loss of contrast, but no loss of resolution). I've tried a duplicate layer, Gauss blur, lighten blend mode.... just got a glowing blur....
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Jul 29, 2009
It included the ability to change the amount, the tonal width and the radius, BUT, I cannot find it in my PS 7.
Is this function not available in Photoshop 7?
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Nov 11, 2004
I can't get Ctrl + Alt + ~ keyboard short cut to work which selects the highlights in an image. The problem is that on my keyboard I have to press Alt Gr to make ~ so can't use Ctrl + Alt + ~ . How can I change the short cut? I know that you can select the highlights by "Select -> Color Range.. -> Highlights" but the result is not as soft as with the short cut. Are there any other ways to select the highlights?
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Nov 11, 2004
I can't get Ctrl + Alt + ~ keyboard short cut to work which selects the highlights in an image. The problem is that on my keyboard I have to press Alt Gr to make ~ so can't use Ctrl + Alt + ~ . How can I change the short cut? I know that you can select the highlights by "Select -> Color Range.. -> Highlights" but the result is not as soft as with the short cut. Are there any other ways to select the highlights?
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Feb 9, 2009
I am using a Nikon D200 and Photoshop CS3. I am shooting 1 stop plus/minus and merging to HDR. It seems that the highlights are always getting blown out much more than the middle image. The shadows are brought up fairly well, but the entire upper end of the curve seems blown out with loss of contrast. I have been experimenting with different methods during the 32 to 16 bit conversion to correct it but have not been so pleased with the results. I can get the highlights back down, but the upper end is fairly washed out with loss of contrast. It seems like the middle part of the curve is also pushed up a bit which would account for the loss of upper end contrast.
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Oct 25, 2013
I've been using the HDR merge function over the last few days and happily converted numerous images successfully. However, all of a sudden, pictures from the same photo shoot are being converted incorrectly and the HDR function is causing the highlights to be red and completely blown out. I'm doing nothing different and all the lighting is the same as before. Does my software have a bug?
I've just tried doing the HDR merge on the same files in my old Photoshop CS3 and I don't get the problem. Perhaps there's a bug causing it???
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Aug 13, 2008
In Lightroom and other programs I own I can click a button to show blown highlights or clipped shadows. I can't find this in PS3 unless I apply a curve or levels adjustment.
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Dec 29, 2006
I have a picture that I want to dull in selected points as they have burnt out the highlights slightly but I'm not sure which function I should be using.
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Jun 9, 2006
'making the highlights'
it says "Control+click on the Menu Text layer in the palette to select its pixels, then click on the New Layer"
problem is I think they're using an older version of photoshop and mentioning shortcut keys. I can't control+click the menu text layer, i want to know how I can 'select the pixels'
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Dec 17, 2006
I know that in ACR I can see where I have blown highlights by checking the highlight box. If I am working in PS CS2 and I want to see areas with blown highlights in a photo.
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Jun 6, 2009
I thought the shortcut key to select highlights is Ctrl+Alt+Tilde. Why is this not working in Photoshop CS4?
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Apr 26, 2003
Ive heard great things about the airbrush.. It's one of the most popular tools for shading and highlighting images, and is used in nice background wallpapers located at Spoono.com ..... Im wondering how do you use the airbrush to make effective highlights..? What is the key to mastering it? I know practicing and playing around is one way, but Ive spent 20 hours and I cant do anything close to the beautiful images I see
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Dec 14, 2012
I installed the retina display-optimized update to my purchased (non-Creative Cloud) version of Photoshop Design Standard (via the Adobe Updater app that pops up in my menu bar only when updates are available), but now when Photoshop launches, I get Photoshop Extended (and it's a trial version). Is this a known issue? Will I need to reinstall Photoshop?
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Mar 27, 2013
How can I install a recent version of Photoshop Elements and keep the albums set up in the older version?
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Sep 5, 2012
I updated CS4 (student version) to CS5.5 commercial version. The brushes, patterns, shapes and styles I had installed in the CS4 Photoshop version were not loaded into the new version. I no longer have the original files of these assets (or customizations).
How can I load these in the updated version?
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