(PECL imagick 2.0.0)
Imagick::previewImages — Quickly pin-point appropriate parameters for image processing
This function is currently not documented; only its argument list is available.
Tiles 9 thumbnails of the specified image with an image processing operation applied at varying strengths. This is helpful to quickly pin-point an appropriate parameter for an image processing operation.
Preview type. See Preview type constants
Returns TRUE on success.
Throws ImagickException on error.