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Update Autonomous+driving+application+-+Car+detection+-+v1.ipynb #4

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6 changes: 4 additions & 2 deletions ...Networks/week3_Object detection/Autonomous+driving+application+-+Car+detection+-+v1.ipynb
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Expand Up @@ -366,7 +366,9 @@
"\n",
"**Exercise**: Implement iou(). Some hints:\n",
"- In this exercise only, we define a box using its two corners (upper left and lower right): (x1, y1, x2, y2) rather than the midpoint and height/width.\n",
"- To calculate the area of a rectangle you need to multiply its height (y2 - y1) by its width (x2 - x1)\n",
"- To calculate the

of a rectangle you need to multiply its height (y2 - y1) by its width (x2 - x1)\n",
"- You'll also need to find the coordinates (xi1, yi1, xi2, yi2) of the intersection of two boxes. Remember that:\n",
" - xi1 = maximum of the x1 coordinates of the two boxes\n",
" - yi1 = maximum of the y1 coordinates of the two boxes\n",
Expand Down Expand Up @@ -400,7 +402,7 @@
" yi1 = np.maximum(box1[1],box2[1])\n",
" xi2 = np.minimum(box1[2],box2[2])\n",
" yi2 = np.minimum(box1[3],box2[3])\n",
" inter_area = (yi1 - yi2)*(xi1 - xi2)\n",
" inter_area=max(xi2-xi1,0)*max(yi2-yi1,0)",
" ### END CODE HERE ### \n",
"\n",
" # Calculate the Union area by using Formula: Union(A,B) = A + B - Inter(A,B)\n",
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