diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 154bdb52..fc535106 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1254,16 +1254,33 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
         photoInfo.autoExposure = 0;
         if (captureResult.avgY == 0)
         {
-            photoInfo.exposureTime = 400;
-            photoInfo.sensitivity = 2000;
+            photoInfo.exposureTime = 600;
+            photoInfo.sensitivity = 2500;
+        }
+        else if (captureResult.avgY <= 6)
+        {
+            photoInfo.exposureTime = captureResult.exposureTime / 1000000 * 150 / captureResult.avgY;
+            photoInfo.sensitivity = photoInfo.sensitivity * 80 / captureResult.avgY;
+            if (photoInfo.sensitivity < captureResult.sensitivity)
+            {
+                photoInfo.sensitivity = captureResult.sensitivity;
+            }
+            else if (photoInfo.sensitivity > 3000)
+            {
+                photoInfo.sensitivity = 3000;
+            }
         }
         else
         {
             photoInfo.exposureTime = captureResult.exposureTime / 1000000 * 120 / captureResult.avgY;
             photoInfo.sensitivity = photoInfo.sensitivity * 60 / captureResult.avgY;
-            if (photoInfo.sensitivity > 2000)
+            if (photoInfo.sensitivity < captureResult.sensitivity)
+            {
+                photoInfo.sensitivity = captureResult.sensitivity;
+            }
+            else if (photoInfo.sensitivity > 3000)
             {
-                photoInfo.sensitivity = 2000;
+                photoInfo.sensitivity = 3000;
             }
         }
 
@@ -1282,7 +1299,7 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
     char str[128] = { 0 };
     snprintf(str, sizeof(str), "AE=%u EXPS=%u%s(%d) ISO=%d AF=%u LDR=%d(%u) AFS=%u AES=%u SCENE=%d AWB=%u %0.1fx", captureResult.autoExposure,
              extime, extimeunit, captureResult.compensation,
-             captureResult.sensitibity,
+             captureResult.sensitivity,
              captureResult.autoFocus,
              // isnan(captureResult.FocusDistance) ? 0 : captureResult.FocusDistance,
              GpioControl::getLightAdc(), (unsigned int)captureResult.avgY,