Add automatic per-camera color matching at the seam

crates/reco-cli/src/main.rs

@@ -176,6 +176,11 @@ enum Commands {
         #[arg(long, value_parser = parse_blend)]
         blend: Option<f32>,
 
+        /// Enable automatic per-camera exposure/white-balance matching
+        /// at the seam. Opt-in: off by default.
+        #[arg(long, default_value_t = false)]
+        color_match: bool,
+
         /// Frame offset for temporal sync between cameras.
         /// Positive: skip N right frames (right started first).
         /// Negative: skip N left frames (left started first).
@@ -787,6 +792,7 @@ fn main() -> anyhow::Result<()> {
             codec,
             quality,
             blend,
+            color_match,
             sync_offset,
             model,
             detection_interval,
@@ -812,6 +818,7 @@ fn main() -> anyhow::Result<()> {
                 width,
                 height,
                 blend,
+                color_match,
                 start_time,
                 end_time,
                 max_frames,

crates/reco-cli/src/stitch.rs

@@ -24,6 +24,7 @@ pub struct StitchArgs<'a> {
     pub width: u32,
     pub height: u32,
     pub blend: Option<f32>,
+    pub color_match: bool,
     pub start_time: Option<f64>,
     pub end_time: Option<f64>,
     pub max_frames: Option<u64>,
@@ -126,6 +127,9 @@ pub fn run_stitch(args: StitchArgs<'_>, interrupted: &Arc<AtomicBool>) -> anyhow
     if let Some(b) = args.blend {
         job = job.blend_width(b);
     }
+    if args.color_match {
+        job = job.color_match(true);
+    }
     if let Some(t) = args.start_time {
         job = job.start_time(t);
     }

crates/reco-core/src/core/mod.rs

@@ -487,6 +487,13 @@ impl StitchCore {
         self.executor.set_blend_width(width);
     }
 
+    /// Toggle automatic per-camera seam-band color matching (GPU executor
+    /// only; see [`crate::stitch::Executor::set_color_match_enabled`]).
+    /// Off by default.
+    pub fn set_color_match_enabled(&mut self, enabled: bool) {
+        self.executor.set_color_match_enabled(enabled);
+    }
+
     /// Set the lens-correction strength on every lens (`0` = pinhole,
     /// `1` = full KB4).
     pub fn set_lens_correction_amount(&mut self, amount: f32) {