From 1ddf6cf4b9f123f81cccedf9a9cd914209b10d01 Mon Sep 17 00:00:00 2001
From: Dan Norris <protochron@users.noreply.github.com>
Date: Sun, 22 Oct 2023 22:44:29 -0400
Subject: [PATCH] Add auto_threshold

---
 src/wand/magick.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/wand/magick.rs b/src/wand/magick.rs
index 61877bd..54d4185 100644
--- a/src/wand/magick.rs
+++ b/src/wand/magick.rs
@@ -1017,6 +1017,17 @@ impl MagickWand {
         res == bindings::MagickBooleanType_MagickTrue
     }
 
+    /// Automatically performs threshold method to reduce grayscale data
+    /// down to a binary black & white image. Included algorithms are
+    /// Kapur, Otsu, and Triangle methods.
+    /// See <https://imagemagick.org/api/magick-image.php#MagickAutoThresholdImage> for more information.
+    pub fn auto_threshold(&self, method: bindings::AutoThresholdMethod) -> Result<()> {
+        match unsafe { bindings::MagickAutoThresholdImage(self.wand, method) } {
+            bindings::MagickBooleanType_MagickTrue => Ok(()),
+            _ => Err(MagickError("unable to auto threshold image")),
+        }
+    }
+
     mutations!(
         /// Set the image colorspace, transforming (unlike `set_image_colorspace`) image data in
         /// the process.