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   "source": [
    "## 1.关于图像特征\n",
    ">1.统计特征\n",
    ">2.数学特征（奇异值分解）\n",
    ">3.卷积特征"
   ]
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  {
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   "id": "7e2ab7e5-9636-4c42-9169-e9c999cbf205",
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    "2.卷积特征"
   ]
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       "True"
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   "source": [
    "import cv2\n",
    "import numpy as up\n",
    "#import malplotlib.pyplot as plt\n",
    "\n",
    "#读取图片：大矩阵\n",
    "img = cv2.imread(\"gpu.bmp\")\n",
    "img = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)\n",
    "#准备小矩阵：算子\n",
    "img_sobel = cv2.Sobel(\n",
    "    img, \n",
    "    -1,\n",
    "    1,#一阶微分\n",
    "    1,\n",
    "    ksize=3,\n",
    "    scale=1.0,\n",
    "    delta=50.0\n",
    ")\n",
    "    \n",
    "#显示\n",
    "#plt.inshow(img_sobel)\n",
    "cv2.imwrite(\"3.jpg\", img_sobel)"
   ]
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