bool imagefilter ( resource src_im, int filtertype [, int arg1 [, int arg2 [, int arg3]]] )
imagefilter() to the image, using
,
where necessary.
: Reverses all colors of

the image.
: Converts the image into

grayscale.
: Changes the brightness

of the image. Use
to set the level of

brightness.
: Changes the contrast of

the image. Use
to set the level of

contrast.
, except you can specify the

color. Use
,
,
,
. The range for each color is 0 to 255.
: Uses edge detection to

highlight the edges in the image.
: Embosses the image.
: Blurs the image using

the Gaussian method.
: Blurs the image.
: Uses mean removal to

achieve a "sketchy" effect.
: Makes the image smoother.

Use
to set the level of smoothness.
TRUE FALSE в случае возникновения ошибки.