diff --git a/src/images.rs b/src/images.rs
index 0215030..adfd31a 100644
--- a/src/images.rs
+++ b/src/images.rs
@@ -26,7 +26,19 @@ pub fn convert_image_with_format(image_format: ImageFormat, image: DynamicImage)
         ImageRotation::Rot270 => image.rotate270(),
     };
 
-    let image = image.resize_exact(ws as u32, hs as u32, FilterType::Nearest);
+    // Nearest-neighbour discards the antialiasing of whatever the caller drew. At the
+    // Stream Deck +'s 6:5 ratio (144 -> 120) it drops every sixth row and column and
+    // point-samples soft edges into stair-steps.
+    //
+    // Cost scales with the source area, which is up to the caller, so skip the resample
+    // altogether when the image already matches the format. That is both the common case
+    // and the escape hatch: a caller that scales to the target size itself pays nothing
+    // here, rather than paying for a resample to get its own pixels back.
+    let image = if image.dimensions() == (ws as u32, hs as u32) {
+        image
+    } else {
+        image.resize_exact(ws as u32, hs as u32, FilterType::Lanczos3)
+    };
 
     // Applying mirroring
     let image = match image_format.mirror {