JAVA based solution
Intuition\n Describe your first thoughts on how to solve this problem. \n\n\n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- T
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\nO(m*n*9)\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n\n# Code\n\n\nimport java.util.ArrayList;\n\nclass Solution {\n\n  public int[][] resultGrid(int[][] image, int threshold) {\n    int[][] result = new int[image.length][image[0].length];\n\n    ArrayList<ArrayList<ArrayList<Integer>>> list = new ArrayList<>();\n\n    // Initializing the list\n    for (int i = 0; i < image.length; i++) {\n      ArrayList<ArrayList<Integer>> row = new ArrayList<>();\n      for (int j = 0; j < image[0].length; j++) {\n        row.add(new ArrayList<>());\n      }\n     list.add(row);\n\n    }\n\n    // Traverse the image to check 3x3 regions\n    for (int i = 0; i <= image.length - 3; i++) {\n      for (int j = 0; j <= image[0].length - 3; j++) {\n        int sum = 0;\n      boolean isRegion = true;\n\n        // Calculate the sum of the 3x3 region and check the threshold condition\n        for (int k = i; k < i + 3; k++) {\n          for (int l = j; l < j + 3; l++) {\n            sum += image[k][l];\n            if (k > i && Math.abs(image[k][l] - image[k-1][l]) > threshold) {\n              isRegion = false;\n\n            }\n\n            if (l > j && Math.abs(image[k][l] - image[k][l-1]) > threshold) {\n\n           isRegion = false;\n\n            }\n          }\n        }\n\n        // If the region is valid, add the average to the list\n        if (isRegion) {\n          int average = sum / 9;\n          for (int k = i; k < i + 3; k++) {\n            for (int l = j; l < j + 3; l++) {\n              list.get(k).get(l).add(average);\n            }\n          }\n        }\n     }\n\n    }\n\n\n\n    // Calculate the final result based on the list\n    for (int i = 0; i < image.length; i++) {\n      for (int j = 0; j < image[0].length; j++) {\n        int ans = 0;\n        if (!list.get(i).get(j).isEmpty()) {\n          for (int k = 0; k < list.get(i).get(j).size(); k++) {\n            ans += list.get(i).get(j).get(k);\n\n          }\n          result[i][j] = ans / list.get(i).get(j).size();\n\n        } else {\n          result[i][j] = image[i][j]; // Retain the original value if no region was found\n\n        }\n\n      }\n\n    }\n\n\n\n    return result;\n\n  }\n\n}\n\n
['Java']