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Posted on Sep 03, 2008

Adjust image brightness/contrast

Hello friends,

I am trying to adjust image brightness/contrast in HTML page using canvas tag. But i couldn't do it. Anybody send me full javascript coding using canvas tag to adjust brightness/contrast of an image.

thanks.

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Anonymous

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  • Posted on Sep 06, 2008
Anonymous
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Sorry dude, you can get it from net right, i found it in a website, just search.

cool

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How do I adjust the "Brightness" on my 20 year old Model TXJ 2566 Samsung TV?

Hi Norman Malkin, to adjust the brightness of your Samsung TV, you must enter Menu, select Image, display a list where Contrast Brightness Color and other parameters appear, select Brightness and increase or decrease the brightness to your liking, you may need make Color and Contrast adjustments
I hope you can adjust it
Greetings Franco Dosil

Hola Norman Malkin, para ajustar el brillo de tu TV Samsung, debe entrar en Menu, selecciona Imagen, de desplegara un listado donde te aparece Contraste Brillo Color y otros parametros, selecciona Brillo e incremente o disminuye el Brill hasta tu gusto, puede que necesites hacer ajustes de Color y Contraste
Espero lo puedas ajustar
Saludos Franco Dosil
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How to adjust contrast on dell 610

From this web site:
http://www.computerhope.com/issues/ch000594.htm
How do I adjust my brightness or contrast on my laptop? Every laptop is different, so adjusting the brightness or contrast on your laptop may vary from the steps provided on this page. However, understanding the process of how to adjust the brightness or contrast will help you change your settings.
Most laptops adjust their brightness and other settings using the function key in conjunction with another key. For example, pressing and holding the function key (abbreviated as "Fn") and pressing the up or down arrow keys as shown in the picture below, increases and decreases the brightness.
laptop-brightness-keys.jpg
Other examples also shown in the above picture include pressing Fn and F1 and F2 or F7 and F8 to increase and decrease the brightness. If none of the above examples resemble your keyboard look for keys on the keyboard that have pictures of a sun or a half moon to identify the correct key to adjust the brightness.
How can I adjust the laptop contrast? Laptops only allow users to adjust the brightness of their screen. Contrast settings are not adjustable on a laptop display.
How do I save the new adjusted settings? After adjusting your laptops brightness it will retain the new settings.
Laptop brightness is still not enough or screen is black If after following the above steps your brightness is still not enough, plug your laptop into the wall to make sure it is not a power setting that is decreasing the brightness. If the laptop is plugged in but still is not bright enough, try the suggestions on the below link.
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HOW TO SET BRIGHTNESS OF THE SCREEN?

Hi,

Dear User...

You can adjust the brightness and contrast of your monitor to improve the readability of text and to make digital pictures appear more like they'll look when printed.

To improve the results when adjusting the brightness and contrast settings for your display, use Display Color Calibration. (Display Color Calibration helps you adjust these color settings and others.) For more information about calibrating your display color in Windows, see Calibrate your display.

The way you adjust brightness and contrast varies and depends on your specific display.

• Brightness and contrast buttons on the front of the monitor. Some monitors have brightness and contrast controls on the front and use the standard symbols shown in the following image.


• On-screen menu. You can change the brightness and contrast settings for some displays by using an on-screen menu, and then setting the brightness and contrast in the resulting menu. Many times, you can view the on-screen menu by pressing a button-possibly labeled Menu-on the front of the monitor.



Thanks....

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Unable to reduce brightness windows7 ultimate hp1670

laptop ot desktop monitor ?

Adjust your monitor's brightness and contrast

You can adjust the brightness and contrast of your monitor to improve the readability of text and to make digital pictures appear more like they'll look when printed.


To improve the results when adjusting the brightness and contrast settings for your display, use Display Color Calibration. (Display Color Calibration helps you adjust these color settings and others.)

The way you adjust brightness and contrast varies and depends on your specific display.

Brightness and contrast buttons on the front of the monitor.


Some monitors have brightness and contrast controls on the front and use the standard symbols shown in the following image.

Brightness and contrast symbols

On-screen menu. You can change the brightness and contrast settings for some displays by using an on-screen menu, and then setting the brightness and contrast in the resulting menu. Many times, you can view the on-screen menu by pressing a button-possibly labeled Menu-on the front of the monitor.


Laptop display. Laptop displays don't have brightness or contrast buttons on the front.

For a majority of laptops, there isn't a control for setting the contrast.


However, you can set the brightness of many laptops by pressing and holding the Fn key, and then pressing a function key to decrease brightness ( ) or increase brightness ( ).

http://windows.microsoft.com/en-US/windows7/Calibrate-your-display#

When using Display Color Calibration on a laptop, set the display to the maximum brightness setting.


Adjusting brightness automatically using adaptive brightness

Adaptive brightness is a feature in Windows that uses a light sensor to automatically adjust the display brightness to match the lighting conditions in your computer's surroundings.


To use adaptive brightness, you must have light sensors installed and enabled on your computer.


To determine if your laptop or computer monitor supports adaptive brightness, look for the Enable adaptive brightness setting in Power Options (mentioned in the following procedure) or check the information that came with your computer.


To turn adaptive brightness on or off

Open Power Options by clicking the Start button , clicking Control Panel, clicking System and Security, and then clicking Power Options.


Under any plan, click Change plan settings.

Click Change advanced power settings.

In the list, expand Display, and then expand Enable adaptive brightness.


To turn adaptive brightness on or off when your computer is running on battery power, click On battery, and then, in the list, click On or Off.

To turn adaptive brightness on or off when your computer is plugged into an outlet, click Plugged in, and then, in the list, click On or Off.

Click Apply. Click OK.


hope this helps

Jul 26, 2012 • HP...
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HOW DO I BRIGHTEN UP MY MONITOR SCREEN?

hi,
you can adjust the contrast and brightness of the screen accordingly using the following instructions. Please select the right combination of brightness and contrast according to your desire.
  • Please check out controls in the bottom of your monitor, below the scree. I have provided the image below for your reference.
  • 2c2dd1f.jpg
  • In this the fourth option is OSD menu. Please click on it and you will scoll down to options .
  • you can see options called "brightness and contrast". I have added picture for this too!
9b04c60.jpgOnce you go that page,use the menu to enter! then use the 2nd and 3rd button to adjust the brightness. Now your job is done.Please click on 1st button to exit. If you need more assistance in this, please write back to us. Please rate my solution as helpful!


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Brightness/Contrast Adjustment

try going to the setup screen button left of adjustments







try going to the set up menu on the left of the buttons come down to the slider control just above the information icon then go across to color reset hope this helps regards Jim







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VA721/Windows 2000 - contrast/brightness settings grayed out

The monitor is probably set to sRGB under "color adjust".

Change it to 6500K, which is default, and you should be able to adjust brightness and contrast.
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Pictures appear to be darker than original in print outs.

You can make several adjustments to improve your images such as lightening dark areas, changing the exposure, sharpening blurred edges, and changing the brightness and contrast.
  • Exposure adjusts the overall intensity of light in an image.
  • Adaptive Lighting improves only the dark areas in an image without affecting the bright areas.
  • Brightness adjusts the amount of light in colors ranging from light to dark.
  • Contrast adjusts the difference in brightness between light and dark areas of an image.
  • Sharpness helps define edges and the smoothness of texture in an image. Use this tool to make a blurred image appear more focused.
Adjusting the image Follow the steps below to make adjustments:
  1. Click the View tab and select the image you want to edit by either clicking the image, or by clicking the small box at the bottom left corner of the image. Figure 1: Select the image c00603524.gif
  2. Click the Edit tab and then click the Advanced tab.
  3. On the Advanced tools tab, click Adjust Image .
  4. Select an adjustment from the list on the left. Figure 2: Adjusting the brightness c00603525.gif
    • The Exposure adjustment is automatically applied when the Adjust Image tool opens. Eight variations of the image are displayed on the left. The current image is displayed in the center. Each image represents a different level of adjustment. When you move the pointer over any of the images on the left, a large version of the image is displayed. Use Preferences to turn this large image preview on or off and to set the timing for the display.
    • If you want to use a different adjustment tool, select Adaptive Lighting , Brightness , Contrast , or Sharpness from the list.
  5. Select one of the images on the left.
  6. Do one of the following:
    • Click Accept to accept all changes and exit from the Color Toolkit.
    • Click Cancel to discard all changes and exit from the Color Toolkit.
  7. If you have finished modifying the image, do one of the following to save your changes:
    • Click Save to overwrite the original image.
    • Click Save As to save the modified image with a different name.
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Image adjustment functions

SHARPNESS - The function is to adjust sharpness of capturing images. CONTRAST - The function is to adjust contrast (distinction between light and dark) of capturing images. SATURATION - The function is to set color depth of capturing images. GRADATION - In this function, you can select the brightness of an entire image. It is suitable when you want to add a brighter effect to a bright object (Hi Key) and a darker effect to a dark object (Low Key).
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