Exposure, Contrast, Brightness and Colour Saturation

I have read in the past that tone & contrast adjustments can affect colour saturation, but have never seen specific details. Can anyone point me in the right direction, please?

madmanchan wrote:
>> Basically if you increase contrast, you increase saturation. The inverse is also true, i.e., if you decrease contrast, you decrease saturation.
<<
How about an orthogonal definition: HS-L* or HS-Y (see Simon Tindemans).
Regarding Mark's article, there also was a broad discussion:
http://luminous-landscape.com/forum/index.php?showtopic=18413&st=89
Peter

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Adjusting brightness and colour temperature on WindowXP PC

Hi,
I'm using Windows XP PC. I just bought 27" Cinema Display but I find that i can't adjust brightness and colour temperature in Windows XP......
I'm new user for apple and feel confuse about how to use this cinema display well in Windows XP PC.
Many thanks
Ben

For brightness you need the AppleControlPanel.exe file from the Boot Camp package to be able to adjust the brightness - don't install the whole of Boot Camp as it will cause problems on a non-Apple PC, just get this one file - I can provide it if you can't find it elsewhere.

How do I configure the brightness, contrast and colour settings of the built-in HD Camera on iMac?

I have recently purchased an iMac after making the switch from PC.
I am struggling to find an app, or settings configuration where I can modify the brightness, contrast, color and white balance settings for the built-in HD camera. The online manuals didnt give me any answers so I thought I would turn to the communities pages for some help.
The room where the iMac is situated has a light behind me and I am facing the wall so not much light in front of me except the ambient light from the screen. Friends on FaceTime, Skype etc. say that the picture from the built-in camera is too dark and difficult to make out my face clearly. How can I fix this?
Any and all help is most welcome.
Thanks
UKRichard

I would move it if it weren't the main room light that is fixed to the ceiling. Not remodelling my house just for the iMac camera. On my old PC all the webcams came with utilities to adjust these settings, I am surprised Apple dont have something similar for free.
I did see another post about iGlasses here, but not sure I want to pay $10 just to adjust my camera settings
Message was edited by: ukrichard

Hi, I'd like to put a black and white effect on my colour footage which will look really sharp but which also looks bright so the whites look bright and the blacks look very dark . Any tips of which best effects to use to achieve this look in Prem Pro. Th

Hi, I'd like to put a black and white effect on my colour footage which will look really sharp but which also looks bright so the whites look bright and the blacks look very dark . Any tips of which best effects to use to achieve this look in Prem Pro. Thanks

Under the Effects-Lumetri Looks-Desaturation choose a B and W effect. Then add the luma corrector from the Video effects-colour correction section. Adjust the brightness and contrast to get the effect you want.

ACR Brightness and Contrast Defaults

PS CS3 Extended, ACR 4.1, WinXP Pro
In ACR, why is the Brightness set at +50 and Contrast set at +25 by default?
B&C are secondary adjustments to Exposure, Blacks, Recovery and Fill and would be adjusted last if at all. Would it be logical to set new defaults for B&C to be zero when processing RAW files?

Carrie, the numbers are essentially meaningless. As Jeff said, they're just defaults. If you find these initial B and C values are not to your taste, you can twiddle with them till you come up with values that you find better, then save them as your new defaults (or make it a preset).
Eric

How to adjust local brightness and contrast in Premiere Elements 12 ?

For example, in still photo, I know how to apply Photoshop to balance the brightness/contrast between a bright windows facing garden and people chatting in living room next to the bright windows. Just wondering if APE 12 is able to balance the local brightness/contrast in video editing, and how ? or I have to go for Première Pro ?

angus-y
Do you currently own or have any version of Premiere Elements, and what computer operating system is involved?
Assuming your interest to be in Premiere Elements 12 on Windows 7, 8, or 8.1 64 bit....
Export workspace/Adjust Tab/Adjustments Palette/and a variety of panels including Lighting.
The panels are:
Smart Fix
Auto Smart Tone
Color
Color (RGB)
Gamma Correction
Lighting
Temperature and Tint
The Lighting options are as shown in the following screenshot
Under the fx Effects tab in the Expert workspace, you may be interested in
Advanced Adjustments category/Image Control with its options for Brightness, Contrast, Hue, and Saturation
or
Advanced Adjustments category/Shadow/Highlight
Once you apply the effect, you can edit it in Applied Effects Tab/Applied Effects Palette/and expanded Panel for the effect.
If you do not have Premiere Elements 12 already, you may want to download and install the free 30 day tryout to determine if the program is compatible with your computer and meets your video editing needs.
The following Adobe document Effects Reference may be of interest. Although written with version 11 model, many of the effects are applicable to version 12 as well. Just be careful if you are a Mac user. There are several Windows Only features.
Adobe Premiere Elements 11 * Effects reference
ATR

Develop module sliders for overall exposure, contrast, saturation etc. are gone.

The Develop module used to have sliders for overall exposure, contrast, saturation as well as highlights, whites, blacks, shadows, vibrance, clarity etc. Now these functions are only to be found in Library Quick Develop as left/right buttons. I miss the sliders in Develop. There are similar sliders there, but only relating to specific colors, not the overall image. How do I get the sliders back?

Right-click (Ctrl-click on Mac) on any panel group tab e.g Detail, Lens Correction etc and make sure all are checked (see image below).

Mplayer too dark, Equalizer(Contrast,Brightness,Hue,Saturation)

Playing videos on mplayer were too dark!
and Equalizer -> Video (Contrast,Brightness,Hue,Saturation) controls were unavailable/not working!
After some research, I found a solution, for both problems.
Using information on this URL http://www.mplayerhq.hu/DOCS/man/en/mplayer.1.html
Open a Filemanager as root, and go to /etc/mplayer and create a file called mplayer.conf, and paste this code inside.
# Write your default config options here!
# eq[=brightness:contrast] (OBSOLETE)
# default:0:0
# eq2[=gamma:contrast:brightness:saturation:rg:gg:bg:weight]
# default:1.0:1.0:0.0:1.0:1.0:1.0:1.0:1.0
# hue[=hue:saturation]
# default:0.0:1.0
vf=hue=0.0:1.0,eq2=1.0:1.0:0.1:1.0:1.0:1.0:1.0:1.0
Remember to leave 3 empty lines at the end of the code, before saving.
Notice I changed the 3rd default value in eq2 from 0.0 to 0.1, this will appear as 10 in the equalizer.
This 10% increase in brightness gave me a brightness, similar to watching the same video in VLC.
Well I hope it helps someone else having the same issue. :-)

since front row just hijacks dvd player and such you should be able to change it in dvd player's preferances. are the tv shows from the itunes music store?

Camera Raw brightness and contrast preset for art capture?

I'm capturing oil paintings for reproduction with a D3x tethered to Lightroom 3. I'm converting though in camera raw. My camera profile is created using Color Checker Passport software/target which uses a DNG file. Given that, the profile is build without brightness or contrast adjustments. My question is, for accurate color, tone and exposure capture should the default ACR presets for brightness and contrast be reset to 0?
Thanks!

Or use the Zero'd setting on import to get no initial settings. However, I thing you'll find doing your own is better.
Don
Don Ricklin, MacBook 1.83Ghz Duo 2 Core running 10.4.9 & Win XP, Pentax *ist D
http://donricklin.blogspot.com/

Photoshop's brightness and exposure controls?

Can anyone explain the difference(s) between Photoshop's brightness control and its exposure control?
Thanks,
Mark

Did it ever occur to you to consult the documentation, Mark. Say, the User Guide and/or the Help files?
Exposure command
Adjusts tonality by performing calculations in a linear color space. Exposure is primarily for use in HDR images. See Adjust Exposure for HDR image.
Adjust Exposure for HDR images
Comments (0)
The Exposure adjustment is designed for making tonal adjustments to HDR images, but it works with 8‑bit and 16‑bit images. Exposure works by performing calculations in a linear color space (gamma 1.0) rather than the current color space.
1. Do one of the following:
Click the Exposure icon or an Exposure preset in the Adjustments panel.
Choose Layer > New Adjustment Layer > Exposure.
Note: You can also choose Image > Adjustments > Exposure. But keep in mind that this method makes direct adjustments to the image layer and discards image information. Adjustment layers for 32-bit images are available in Photoshop Extended only.
2. In the Adjustments panel, set any of the following options:
Exposure
Adjusts the highlight end of the tonal scale with minimal effect in the extreme shadows.
Offset
Darkens the shadows and midtones with minimal effect on the highlights.
Gamma
Adjusts the image gamma, using a simple power function. Negative values are mirrored around zero (that is, they remain negative but still get adjusted as if they are positive).
The eyedroppers adjust the luminance values of images (unlike the Levels eyedroppers that affect all color channels).
The Set Black Point eyedropper sets the Offset, shifting the pixel you click to zero.
The Set White Point eyedropper sets the Exposure, shifting the point you click to white (1.0 for HDR images).
The Midtone eyedropper sets the Exposure, making the value you click middle gray.
=== === ===
Apply the Brightness/Contrast adjustment
Comments (0)
The Brightness/Contrast adjustment lets you make simple adjustments to the tonal range of an image. Moving the brightness slider to the right increases tonal values and expands image highlights, to the left decreases values and expands shadows. The contrast slider expands or shrinks the overall range of tonal values in the image.
In normal mode, Brightness/Contrast applies proportionate (nonlinear) adjustments to image layer, as with Levels and Curves adjustments. When Use Legacy is selected, Brightness/Contrast simply shifts all pixel values higher or lower when adjusting brightness. Since this can cause clipping or loss of image detail in highlight or shadow areas, using Brightness/Contrast in Legacy mode is not recommended for photographic images (but can be useful for editing masks or scientific imagery).
Note: Use Legacy is automatically selected when editing Brightness/Contrast adjustment layers created with previous versions of Photoshop.
1. Do one of the following:
Click the Brightness/Contrast icon in the Adjustments panel.
Choose Layer > New Adjustment Layer > Brightness/Contrast. Click OK in the New Layer dialog box.
Note: You can also choose Image > Adjustments > Brightness/Contrast. But keep in mind that this method makes direct adjustments to the image layer and discards image information.
2. In the Adjustments panel, drag the sliders to adjust the brightness and contrast.
Dragging to the left decreases the level, and dragging to the right increases it. The number at the right of each slider reflects the brightness or contrast value. Values can range from ‑150 to +150 for Brightness, ‑50 to +100 for Contrast.

Premiere Not Applying "Brightness and Contrast" on Export

Hey all, I'm new to the forums. I'm having a problem with exporting from Premiere Pro.
It seems like Premiere totally ignores the "Brightness and Contrast" video effect. I have a video with increased contrast and increased brightness. It looks good in the viewport, but the exported video still looks flat and washed out, as if it didn't apply the effect. If anything, it seems even more more washed out and less saturated than the source cilp.
To help find the source of the problem, I also tried adding a blur effect (to see if it was ignoring all video effects), but the blur rendered out fine- brightness and contrast didn't.
If it helps, I have Premiere Pro CS5.5 running on a Mac. I'm exporting in H.264. I also made sure to render the footage in Premiere before I exported. Anyone know what's going on?

EDIT: Okay, it does seem like it's working- I just plugged in extreme values for contrast, and there was definitely a difference. However, Premiere still washes out the video upon exporting. Does this have to do with the H.264 codec, or could it be another export option?

Brightness and Contrast Import Defaults

When I import NEFs from a D200, LR gives it a brightness +50 and contrast +25. The photos look pretty good with that setting, but LR instructions suggests to first adjust exposure, recovery, and blacks before futzing with brightness and contrast. So, 1. why does LR do that in the first place, and 2. would I be better off making a preset that starts brightness and contrast at zero, and first do the ex, rec, and black settings?
Also, I was taught never to use the brightness and contrast settings in PS.. are the LR settings fundamentally different?
thanks
Michael

Is there a way to change these defaults? For eg. I'd like to have the default shadows=0, default vibrance=10, default sharpening=0, etc.
I know you can specify a develop preset on import, but I like being able to tell which files are at "default" settings, and which ones I've worked on individually.
Thanks,
Jonathan

High brightness and low colour of display

HP Pavilion 15-n208tx Notebook PC (ENERGY STAR) ,high brightness and contrast for normal display setting so that colour is very less and some items like folders are not clear, Whats the solution

Hey harikottayam,
Thanks for the updated information.
I understand that you are using the default settings, but can you tell me if you are able to adjust the settings to your personal preference?
You can find the steps to do this here: Changing the Visual Appearance of Windows 8.
The default settings for a display are not always perfect for every user, which is why the ability to adjust resolution, brightness, contrast, etcetera, are a standard feature of any display.
If you are unable to adjust the display, or it is still poor quality I would suggest contacting HP Phone Support for service options. You're notebook is new so it should be covered under the factory warranty. You can contact HP Technical Support at 1-800-474-6836 in North America. For all other regions click here.
Hopefully this helps.
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

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This question was solved.
View Solution.

You're very welcome.
You can get the latest version of the HP Support Assistant from the link below:
The download link is on the upper right side of the page (Download HP Support Assistant - Notebooks, Laptops, Netbooks)
http://www8.hp.com/us/en/campaigns/hpsupportassistant/hpsupport.html?jumpid=reg_r1002_usen_c-001_tit...

Exposure, Contrast, Brightness and Colour Saturation

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