From 32583008497f4c3ffd8bce6b81fd94def414a551 Mon Sep 17 00:00:00 2001
From: udlbook <110402648+udlbook@users.noreply.github.com>
Date: Thu, 7 Dec 2023 19:15:25 +0000
Subject: [PATCH] Created using Colaboratory

---
 Notebooks/Chap10/10_3_2D_Convolution.ipynb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Notebooks/Chap10/10_3_2D_Convolution.ipynb b/Notebooks/Chap10/10_3_2D_Convolution.ipynb
index 9a4ff53..c304cc0 100644
--- a/Notebooks/Chap10/10_3_2D_Convolution.ipynb
+++ b/Notebooks/Chap10/10_3_2D_Convolution.ipynb
@@ -4,7 +4,7 @@
   "metadata": {
     "colab": {
       "provenance": [],
-      "authorship_tag": "ABX9TyMmbD0cKYvIHXbKX4AupA1x",
+      "authorship_tag": "ABX9TyNDaU2KKZDyY9Ea7vm/fNxo",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -114,6 +114,11 @@
         "    # Create output\n",
         "    out = np.zeros((batchSize, channelsOut, imageHeightOut, imageWidthOut), dtype=np.float32)\n",
         "\n",
+        "    # !!!!!! NOTE THERE IS A SUBTLETY HERE !!!!!!!!\n",
+        "    # I have padded the image with zeros above, so it is surrouned by a \"ring\" of zeros\n",
+        "    # That means that the image indexes are all off by one\n",
+        "    # This actually makes your code simpler\n",
+        "\n",
         "    for c_y in range(imageHeightOut):\n",
         "      for c_x in range(imageWidthOut):\n",
         "        for c_kernel_y in range(kernelHeight):\n",