Quickly pin-point appropriate parameters for image processing

# Imagick::previewImages

(PECL imagick 2, PECL imagick 3)

Imagick::previewImages — Quickly pin-point appropriate parameters for image processing

### Description

public Imagick::previewImages(int `$preview`): bool

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.

### Parameters

`preview`

  Preview type. See Preview type constants

### Return Values

Returns `true` on success.

### Errors/Exceptions

Throws ImagickException on error.

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