L_BM_MEDIAN
Send this message to median filter an L_BITMAPCLASS window's bitmap.
This changes the color of each pixel in a bitmap to the median color of pixels in its neighborhood. You control the effect by specifying the size of the neighborhood. This is similar to the L_BM_AVERAGE message, but it is used for noise reduction, rather than a blur effect
|
Parameter |
Meaning |
|
wParam |
Specifies whether the window should be redrawn to reflect the image changes. Use 1 to redraw the window, or 0 not to redraw it. |
|
lParam |
The low order of the lParam parameter should specify the dimensions of the neighborhood used to calculate the effect. The value is the length, in pixels, of one side of a square. |
Returns
|
SUCCESS |
Function was successful. |
|
< 0 |
An error occurred. Refer to Return Codes. |