Change brightness/contrast of images

Hi,
Are there APIs available for changing brightness/contrast and other such
properties of images ?
Or, do I have to manually deal with the pixels that make up the image ?

I know there's an opacity property for the Image object. But, I specifically
wanted brightness and contrast.

Raghavendra.

I don't know of managed properties, but you could use a bitmap effect - here
is a link to the custom RGBFilter:

http://windowssdk.msdn.microsoft.com.../ms771475.aspx

Note: BitmapEffects for WPF V1 are in software mode, and some unmanaged
programming is needed, but it's not to bad if you work off the sample.


"Raghavendra" wrote:

> Hi,
> Are there APIs available for changing brightness/contrast and other such
> properties of images ?
> Or, do I have to manually deal with the pixels that make up the image ?
>
> I know there's an opacity property for the Image object. But, I specifically
> wanted brightness and contrast.
>
> Raghavendra.

I don't know of managed properties, but you could use a bitmap effect - here
is a link to the custom RGBFilter:

http://windowssdk.msdn.microsoft.com.../ms771475.aspx

Note: BitmapEffects for WPF V1 are in software mode, and some unmanaged
programming is needed, but it's not to bad if you work off the sample.


"Raghavendra" wrote:

> Hi,
> Are there APIs available for changing brightness/contrast and other such
> properties of images ?
> Or, do I have to manually deal with the pixels that make up the image ?
>
> I know there's an opacity property for the Image object. But, I specifically
> wanted brightness and contrast.
>
> Raghavendra.