diff --git a/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt b/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
index 3717693..20104bd 100644
--- a/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
+++ b/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
@@ -19,6 +19,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import java.util.concurrent.Executor
+import java.util.concurrent.Executors
 
 /**
  * Manages CameraX camera setup and controls.
@@ -56,6 +57,9 @@ class CameraManager(private val context: Context) {
     private val _isFrontCamera = MutableStateFlow(false)
     val isFrontCamera: StateFlow<Boolean> = _isFrontCamera.asStateFlow()
 
+    /** Background executor for image capture callbacks to avoid blocking the main thread. */
+    private val captureExecutor: Executor = Executors.newSingleThreadExecutor()
+
     private var surfaceTextureProvider: (() -> SurfaceTexture?)? = null
     private var surfaceSize: Size = Size(1920, 1080)
     private var lifecycleOwnerRef: LifecycleOwner? = null
@@ -194,10 +198,12 @@ class CameraManager(private val context: Context) {
     }
 
     /**
-     * Gets the executor for image capture callbacks.
+     * Gets the background executor for image capture callbacks.
+     * Uses a dedicated thread to avoid blocking the main/UI thread during heavy
+     * bitmap processing (decode, rotate, tilt-shift effect).
      */
     fun getExecutor(): Executor {
-        return ContextCompat.getMainExecutor(context)
+        return captureExecutor
     }
 
     /**