Method
VipsImagesign
Declaration [src]
int
vips_sign (
VipsImage* in,
VipsImage** out,
...
)
Description [src]
Finds the unit vector in the direction of the pixel value. For non-complex images, it returns a signed char image with values -1, 0, and 1 for negative, zero and positive pixels. For complex images, it returns a complex normalised to length 1.
::: seealso
vips_abs().
Parameters
out |
VipsImage |
Output image. |
|
| The argument will be set by the function. | |
| The instance takes ownership of the data, and is responsible for freeing it. | |
... |
none |
|