moment work

lib/main.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:ffi';
 import 'package:camera/camera.dart';
 import 'dart:typed_data';
 
@@ -25,11 +26,16 @@ class _CameraAppState extends State<CameraApp> {
   var image_height = 0;
   var posy = 0.0;
   var posx = 0.0;
+  var count = 0.0;
+  static const alpha = 0.99;
+  static const thresh = 25;
   Uint8List? previousImage;
   Uint8List? diff;
   Uint8List? dst;
+  Uint64List? diffValues;
   Float32List? background;
-  Float64List? sums;
+  Float64List? diffWeightsX;
+  
 
   @override
   void initState() {
@@ -94,7 +100,8 @@ class _CameraAppState extends State<CameraApp> {
   }
 
   void handleImage(CameraImage src) {
-    sums = Float64List(src.height);
+    diffWeightsX = Float64List(src.width);
+    diffValues = Uint64List(src.width);
     
     if (previousImage == null || background == null) {
       previousImage = Uint8List(src.planes[0].bytes.length);
@@ -104,27 +111,42 @@ class _CameraAppState extends State<CameraApp> {
       image_width = src.width;
       image_height = src.height;
     } else {
-      for (var i = 0; i < src.width; i++) {
-        for (var j = 0; j < src.height; j++) {
+      for (var i = 0; i < image_height; i++) {
+        for (var j = 0; j < image_width; j++) {
           //Background calculation
-          background![i + j] = (background![i + j] * 0.99 +
-              src.planes[0].bytes[i + j].toDouble() * (1.0 - 0.99));
+          background![i + j] = (background![i + j] * alpha +
+              src.planes[0].bytes[i + j].toDouble() * (1.0 - alpha));
 
           //Difference calculation
-          var diff_val =
-              (background![i + j].toInt() - src.planes[0].bytes[i + j]).abs();
-          if (diff_val > 50) {
-            diff![i + j] = diff_val;
-          } else {
-            diff![i + j] = 0;
+          diff![i + j] =  (background![i + j].toInt() - src.planes[0].bytes[i + j]).abs();
+          if(diff![i + j] > thresh) {
+            diffWeightsX![i] += diff![i + j] * j;
+            diffValues![i] += diff![i + j];
           }
-
-          //Center of motion calc
-          sums[i] += 
         }
       }
       // Processing
-      print(diff![0]);
+
+      //Average X Position
+      posx = 0;
+      posy = 0;
+      var currentCount = 0;
+      var weightsY = 0;
+      for(var i = 0; i < diffWeightsX!.length; i++){
+        if(diffValues![i] > 0){
+          posx += (diffWeightsX![i]/diffValues![i])/diffWeightsX!.length;
+          weightsY += diffValues![i] * i;
+          currentCount += diffValues![i];
+        }
+      }
+
+      if(currentCount > 0) {
+        posy = weightsY/currentCount;
+      }
+      
+      count = count * alpha +  (currentCount/(image_width * image_height * 255) * 100.0) * (1.0 - alpha);
+      print(count);
+
       // End Processing
       previousImage = src.planes[0].bytes;
     }