From dea854b684fdcd37d2aa6f59709369f07ac0320c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oliver=20Sto=CC=88hr?= <stoehr@effective-webwork.de>
Date: Tue, 17 May 2022 13:57:41 +0200
Subject: [PATCH] Fix blurry derivatives caused by using wrong subfile

---
 .../main/java/org/kitodo/imagemanagement/ImageConverter.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Kitodo-ImageManagement/src/main/java/org/kitodo/imagemanagement/ImageConverter.java b/Kitodo-ImageManagement/src/main/java/org/kitodo/imagemanagement/ImageConverter.java
index 1f8ad0f3409..d7318d04dc7 100644
--- a/Kitodo-ImageManagement/src/main/java/org/kitodo/imagemanagement/ImageConverter.java
+++ b/Kitodo-ImageManagement/src/main/java/org/kitodo/imagemanagement/ImageConverter.java
@@ -74,7 +74,9 @@ class ImageConverter {
      *            source image to convert
      */
     ImageConverter(URI imageFileUri) {
-        source = uriToPath(imageFileUri);
+        // Add "[0]" to the path to make sure ImageMagick only uses the "main" image and ignores other, potential subfiles like embedded thumbnails.
+        // Especially relevant for TIFF files.
+        source = uriToPath(imageFileUri) + "[0]";
     }
 
     /**