Inverted Color QR Code Decoding (#795)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9295d3..2c8b41b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ Exported Uniform Resource (UR) QR codes, a widely adopted standard for exchangin
 - Bugfix: Screensaver not activating in menu pages without statusbar
 - Embit: Improved BIP39 mnemonic validation
 - Bug Fix: Corrected handling of certain binary-encoded QR codes
+- Improved QR code decoding performance and added inverted color QR code detection
 
 # Changelog 25.10.1 - October 2025
 
diff --git a/mkdocs.yml b/mkdocs.yml
index 1d4067a..4d0d69c 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -52,7 +52,7 @@ edit_uri: edit/main/docs
 docs_dir: docs
 site_dir: public
 extra:
-  latest_krux: krux-v25.10.1
+  latest_krux: krux-v25.11.beta2
   latest_installer: v0.0.21
   latest_installer_rpm: krux_installer-0.0.21-1.x86_64.rpm
   latest_installer_deb: krux_installer_0.0.21_amd64.deb
diff --git a/pyproject.toml b/pyproject.toml
index ec335a7..5281f55 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@
 
 [tool.poetry]
 name = "krux"
-version = "25.11.beta1"
+version = "25.11.beta2"
 description = "Open-source signing device firmware for Bitcoin"
 authors = ["Jeff S <jeffreesun@protonmail.com>"]
 readme = "README.md"
diff --git a/src/krux/camera.py b/src/krux/camera.py
index 2780ef1..9508807 100644
--- a/src/krux/camera.py
+++ b/src/krux/camera.py
@@ -176,7 +176,7 @@ class Camera:
         # Center weight mode = 7, default=0x01 (center mode = 0)
         sensor.__write_reg(0x0C, 0x71)
 
-    def has_antiglare(self):
+    def has_mode_control(self):
         """Returns whether the camera has anti-glare functionality"""
         return self.cam_id in (OV7740_ID, OV2640_ID, GC2145_ID, GC0328_ID)
 
diff --git a/src/krux/metadata.py b/src/krux/metadata.py
index afe21d5..d2b27c9 100644
--- a/src/krux/metadata.py
+++ b/src/krux/metadata.py
@@ -19,5 +19,5 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
-VERSION = "25.11.beta1"
+VERSION = "25.11.beta2"
 SIGNER_PUBKEY = "03339e883157e45891e61ca9df4cd3bb895ef32d475b8e793559ea10a36766689b"
diff --git a/src/krux/pages/qr_capture.py b/src/krux/pages/qr_capture.py
index 1fedf0c..647cdf8 100644
--- a/src/krux/pages/qr_capture.py
+++ b/src/krux/pages/qr_capture.py
@@ -53,8 +53,8 @@ class QRCodeCapture(Page):
         else:
             self.ctx.light.turn_off()
 
-    def anti_glare_control(self):
-        """Controls the anti-glare based on the user input"""
+    def mode_control(self):
+        """Controls camera mode based on the user input"""
         self.ctx.display.to_portrait()
         mode = self.ctx.camera.toggle_camera_mode()
         if mode == QR_SCAN_MODE:
@@ -137,7 +137,7 @@ class QRCodeCapture(Page):
         previous_part = None
         ur_highlighted = False
 
-        # Flush events ocurred while loading camera
+        # Flush events occurred while loading camera
         self.ctx.input.reset_ios_state()
         start_time = time.ticks_ms()
         self.ctx.display.clear()
@@ -148,6 +148,11 @@ class QRCodeCapture(Page):
             t("Press PAGE to toggle mode"), offset_y
         )
         self.ctx.display.to_landscape()
+
+        # Cache end time for message display to avoid repeated addition
+        message_end_time = start_time + MESSAGE_DISPLAY_PERIOD
+        first_frame = True
+
         while True:
             wdt.feed()
 
@@ -159,8 +164,8 @@ class QRCodeCapture(Page):
             # Anti-glare / zoom / normal mode
             page_prev_event = self.ctx.input.page_prev_event()
             if self.ctx.input.page_event() or (kboard.is_yahboom and page_prev_event):
-                if self.ctx.camera.has_antiglare():
-                    self.anti_glare_control()
+                if self.ctx.camera.has_mode_control():
+                    self.mode_control()
                 else:
                     break
 
@@ -184,15 +189,15 @@ class QRCodeCapture(Page):
                 ur_highlighted = False
 
             img = self.ctx.camera.snapshot()
-            if time.ticks_ms() < start_time + MESSAGE_DISPLAY_PERIOD:
+            if time.ticks_ms() < message_end_time:
                 self.ctx.display.render_image(img, title_lines=title_lines)
             else:
                 self.ctx.display.render_image(img)
 
-            res = img.find_qrcodes()
+            res = img.find_qrcodes(find_inverted=first_frame)
             if res:
-                data = res[0].payload()
-                new_part = parser.parse(data)
+                first_frame = False
+                new_part = parser.parse(res[0].payload())
 
                 if (
                     parser.format == FORMAT_UR
diff --git a/tests/test_camera.py b/tests/test_camera.py
index a35e171..78854ee 100644
--- a/tests/test_camera.py
+++ b/tests/test_camera.py
@@ -134,7 +134,7 @@ def test_initialize_run_with_anti_glair_enabled(mocker, m5stickv):
     assert c.cam_id is not None
 
 
-def test_toggle_antiglare(mocker, m5stickv):
+def test_toggle_mode(mocker, m5stickv):
     import krux
     from krux.camera import (
         Camera,
@@ -153,9 +153,9 @@ def test_toggle_antiglare(mocker, m5stickv):
     for sensor_id in SENSORS_LIST:
         mocker.patch("krux.camera.sensor.get_id", lambda: sensor_id)
         c = Camera()
-        mocker.spy(c, "has_antiglare")
+        mocker.spy(c, "has_mode_control")
         c.initialize_sensor()
-        if c.has_antiglare():
+        if c.has_mode_control():
             assert c.mode == QR_SCAN_MODE
             c.toggle_camera_mode()
             assert c.mode == ANTI_GLARE_MODE