From 013e870519996fd792ed849cf14eee91c8284131 Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@lemstra.org>
Date: Tue, 19 Aug 2025 08:04:35 +0200
Subject: [PATCH] Change the colorspace to GrayScale when an exr image only has
 a single Y channel (#8305)

---
 coders/exr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/coders/exr.c b/coders/exr.c
index 81c79ae050..e6664938c1 100644
--- a/coders/exr.c
+++ b/coders/exr.c
@@ -281,6 +281,8 @@ static MagickBooleanType InitializeEXRChannels(Image *image,exr_context_t ctxt,
     status=SetPixelMetaChannels(image,number_meta_channels,exception);
   if (status == MagickFalse)
     return(status);
+  if ((decoder.channel_count == 1) && (pixel_channels[0] == IndexPixelChannel))
+    image->colorspace=GRAYColorspace;
   *data=(uint8_t *) AcquireQuantumMemory(*pixel_size,pixel_count);
   if (*data == (uint8_t*)NULL)
     {