diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 1c0669cc..22895dbd 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1042,9 +1042,6 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
         }
     }
 
-
-
-
 #ifdef _DEBUG
 
     cv::Scalar scalarRed(0, 0, 255);  // red
diff --git a/app/src/main/cpp/camera2/ndkcamera.cpp b/app/src/main/cpp/camera2/ndkcamera.cpp
index c7d1d267..57c08e9f 100644
--- a/app/src/main/cpp/camera2/ndkcamera.cpp
+++ b/app/src/main/cpp/camera2/ndkcamera.cpp
@@ -17,7 +17,9 @@
 #include <string>
 #include <thread>
 #include <android/log.h>
+#include <opencv2/opencv.hpp>
 #include <opencv2/core/core.hpp>
+#include <opencv2/highgui.hpp>
 #include "mat.h"
 #include "gpu.h"
 #include "Camera2Helper.h"
@@ -211,9 +213,7 @@ int NdkCamera::open(const std::string& cameraId) {
             // DisplayDimension maxJPG(0, 0);
 
             foundIt = false;
-            unsigned long long minRatio = -1;
             DisplayDimension temp;
-            unsigned long long pixels = (unsigned long long)mWidth * mHeight;
 
             for (int i = 0; i < e.count; i += 4)
             {
@@ -226,12 +226,9 @@ int NdkCamera::open(const std::string& cameraId) {
                     DisplayDimension res(e.data.i32[i + 1], e.data.i32[i + 2]);
                     if (!disp.IsSameRatio(res))
                     {
-                        unsigned long long ps = res.width() * res.height();
-                        unsigned long long ratio = (ps >= pixels) ? (ps - pixels) : (pixels - ps);
-                        if (ratio < minRatio)
+                        if (res.width() >= mWidth && res.height() >= mHeight)
                         {
                             temp = res;
-                            minRatio = ratio;
                         }
                         continue;
                     }
@@ -240,9 +237,7 @@ int NdkCamera::open(const std::string& cameraId) {
                     {
                         foundIt = true;
                         foundRes = res;
-                    }/* else if (format == AIMAGE_FORMAT_JPEG && res > maxJPG) {
-                            maxJPG = res;
-                        }*/
+                    }
                 }
             }
 
@@ -260,6 +255,8 @@ int NdkCamera::open(const std::string& cameraId) {
             return 1;
         }
 
+        // foundRes.Flip();
+
         // query faceing
         acamera_metadata_enum_android_lens_facing_t facing = ACAMERA_LENS_FACING_FRONT;
         {
@@ -400,7 +397,8 @@ int NdkCamera::open(const std::string& cameraId) {
 
     // setup imagereader and its surface
     {
-        media_status_t mstatus = AImageReader_new(foundRes.width(), foundRes.height(), AIMAGE_FORMAT_YUV_420_888, /*maxImages*/2, &image_reader);
+        // media_status_t mstatus = AImageReader_new(foundRes.width(), foundRes.height(), AIMAGE_FORMAT_YUV_420_888, /*maxImages*/2, &image_reader);
+        media_status_t mstatus = AImageReader_new(foundRes.org_width(), foundRes.org_height(), AIMAGE_FORMAT_YUV_420_888, /*maxImages*/2, &image_reader);
 
         if (mstatus == AMEDIA_OK)
         {
@@ -800,10 +798,29 @@ void NdkCamera::on_image(const unsigned char* nv21, int nv21_width, int nv21_hei
     }
 
     // nv21_rotated to rgb
-    cv::Mat rgb(h, w, CV_8UC3);
-    // ncnn::yuv420sp2rgb(nv21_rotated.data, w, h, rgb.data);
-    ncnn::yuv420sp2rgb_nv12(yuv420data, w, h, rgb.data);
-
+    cv::Mat rgb;
+    if (w == mWidth && h == mHeight)
+    {
+        rgb.create(h, w, CV_8UC3);
+        // ncnn::yuv420sp2rgb(nv21_rotated.data, w, h, rgb.data);
+        ncnn::yuv420sp2rgb_nv12(yuv420data, w, h, rgb.data);
+    }
+    else
+    {
+        cv::Mat org(h, w, CV_8UC3);
+        ncnn::yuv420sp2rgb_nv12(yuv420data, w, h, org.data);
+        if (w * mHeight == h * mWidth) // Same Ratio
+        {
+            cv::resize(org, rgb, cv::Size(mWidth, mHeight));
+        }
+        else
+        {
+            // Crop image
+            int left = (w - mWidth) / 2;
+            int top = (h - mHeight) / 2;
+            rgb = org(cv::Range(top, top + mHeight), cv::Range(left, left + mWidth));
+        }
+    }
     on_image(rgb);
 }