{
  "id": 65597,
  "title": "Do anyone follow a faster RCNN approach to handle pneumonia classification?",
  "url": "/competitions/rsna-pneumonia-detection-challenge/discussion/65597",
  "author_name": "shiv",
  "post_date": "2018-09-12T15:55:11.638000",
  "votes": 6,
  "comment_count": 10,
  "views": 0,
  "content": "<p>Just curious but I would like to know if anyone has used a faster RCNN to handle this task. There is a kernel on using mask RCNN but I believe this task doesn't require instance segmentation.</p>",
  "messages": [
    {
      "id": 386323,
      "postDate": "2018-09-12T15:55:11.640Z",
      "content": "<p>Just curious but I would like to know if anyone has used a faster RCNN to handle this task. There is a kernel on using mask RCNN but I believe this task doesn't require instance segmentation.</p>",
      "rawMarkdown": "Just curious but I would like to know if anyone has used a faster RCNN to handle this task. There is a kernel on using mask RCNN but I believe this task doesn't require instance segmentation.",
      "votes": 6
    },
    {
      "id": 387238,
      "postDate": "2018-09-14T15:43:30.300Z",
      "content": "<p>i am using Yolo with pretrained weight on COCO too.DO i really need images with bounding box?i got really bad performance witout them.</p>",
      "rawMarkdown": "i am using Yolo with pretrained weight on COCO too.DO i really need images with bounding box?i got really bad performance witout them.",
      "replies": [
        {
          "id": 387977,
          "postDate": "2018-09-16T03:09:32.960Z",
          "content": "<p>I'm not sure. In my case, using images without bounding box improves one percent of the result on test data. I will continue to tune my model.</p>",
          "rawMarkdown": "I'm not sure. In my case, using images without bounding box improves one percent of the result on test data. I will continue to tune my model."
        }
      ]
    },
    {
      "id": 386725,
      "postDate": "2018-09-13T13:00:18.477Z",
      "content": "<p>@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.</p>",
      "rawMarkdown": "@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.",
      "replies": [
        {
          "id": 387020,
          "postDate": "2018-09-14T06:27:30.023Z",
          "content": "<blockquote>\n  <p><strong>shiv wrote</strong></p>\n  \n  <blockquote>\n    <p>@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.</p>\n  </blockquote>\n</blockquote>\n\n<p>I'm testing  the idea of <a href=\"https://github.com/rbgirshick/py-faster-rcnn/issues/231\">https://github.com/rbgirshick/py-faster-rcnn/issues/231</a>. BUT  I get poor results of rpn right now. If I succeed, I will share my idea. You can refer to tensorpack  <a href=\"https://github.com/tensorpack/tensorpack/tree/master/examples/FasterRCNN\">https://github.com/tensorpack/tensorpack/tree/master/examples/FasterRCNN</a>. VERY POWERFUL implementation.  </p>",
          "rawMarkdown": "\n&gt; **shiv wrote**\n&gt; \n&gt; &gt; @building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.\n\nI'm testing  the idea of https://github.com/rbgirshick/py-faster-rcnn/issues/231. BUT  I get poor results of rpn right now. If I succeed, I will share my idea. You can refer to tensorpack  https://github.com/tensorpack/tensorpack/tree/master/examples/FasterRCNN. VERY POWERFUL implementation.  ",
          "votes": 2
        }
      ]
    },
    {
      "id": 386600,
      "postDate": "2018-09-13T08:05:18.810Z",
      "content": "<p>I'm using faster rcnn.  BUT I still don't have a good idea to use the image without bounding box. Right Now I just use the image with bounding boxes to train model.</p>",
      "rawMarkdown": "I'm using faster rcnn.  BUT I still don't have a good idea to use the image without bounding box. Right Now I just use the image with bounding boxes to train model.",
      "replies": [
        {
          "id": 386707,
          "postDate": "2018-09-13T12:22:31.623Z",
          "content": "<p>I am using Faster R-CNN ResNet101 pretrained on COCO.<br>\nI tried Prune's answer in \"<a href=\"https://stackoverflow.com/questions/46589962/should-i-include-negative-examples-for-tensorflow-object-detection-api?rq=1\">https://stackoverflow.com/questions/46589962/should-i-include-negative-examples-for-tensorflow-object-detection-api?rq=1</a>\" to use images without bounding boxes, but got a very poor accuracy.</p>",
          "rawMarkdown": "I am using Faster R-CNN ResNet101 pretrained on COCO.<br>\nI tried Prune's answer in \"https://stackoverflow.com/questions/46589962/should-i-include-negative-examples-for-tensorflow-object-detection-api?rq=1\" to use images without bounding boxes, but got a very poor accuracy.",
          "votes": 1
        },
        {
          "id": 386748,
          "postDate": "2018-09-13T13:51:35.240Z",
          "content": "<p>Did you do any sampling for the images? I'm trying a RetinaNet, but I have very poor performance unless I sample more abnormal images than normal images.</p>",
          "rawMarkdown": "Did you do any sampling for the images? I'm trying a RetinaNet, but I have very poor performance unless I sample more abnormal images than normal images."
        },
        {
          "id": 386765,
          "postDate": "2018-09-13T14:52:45.493Z",
          "content": "<p>I randomly sampled no opacity images. The ratio of sampled normal and abnormal will be same as that of original entire dataset( normal:abnormal = 8525:11500 ).</p>",
          "rawMarkdown": "I randomly sampled no opacity images. The ratio of sampled normal and abnormal will be same as that of original entire dataset( normal:abnormal = 8525:11500 )."
        },
        {
          "id": 387027,
          "postDate": "2018-09-14T06:40:50.357Z",
          "content": "<p>Maybe this is a good start <a href=\"https://github.com/rbgirshick/py-faster-rcnn/issues/231\">https://github.com/rbgirshick/py-faster-rcnn/issues/231</a>. But it seems that we need to rebalance the ratio of fg and bg.</p>",
          "rawMarkdown": "Maybe this is a good start https://github.com/rbgirshick/py-faster-rcnn/issues/231. But it seems that we need to rebalance the ratio of fg and bg.",
          "votes": 1
        }
      ]
    },
    {
      "id": 386419,
      "postDate": "2018-09-12T20:19:04.563Z",
      "rawMarkdown": "",
      "isDeleted": true
    }
  ],
  "comments": [
    {
      "id": 387238,
      "author_name": "天马流星拳",
      "author_url": "",
      "post_date": "2018-09-14T15:43:30.300000",
      "content": "<p>i am using Yolo with pretrained weight on COCO too.DO i really need images with bounding box?i got really bad performance witout them.</p>",
      "votes": 0,
      "replies": [
        {
          "id": 387977,
          "author_name": "building11_301",
          "author_url": "",
          "post_date": "2018-09-16T03:09:32.960000",
          "content": "<p>I'm not sure. In my case, using images without bounding box improves one percent of the result on test data. I will continue to tune my model.</p>",
          "votes": 0,
          "replies": []
        }
      ]
    },
    {
      "id": 386725,
      "author_name": "shiv",
      "author_url": "",
      "post_date": "2018-09-13T13:00:18.477000",
      "content": "<p>@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.</p>",
      "votes": 0,
      "replies": [
        {
          "id": 387020,
          "author_name": "building11_301",
          "author_url": "",
          "post_date": "2018-09-14T06:27:30.023000",
          "content": "<blockquote>\n  <p><strong>shiv wrote</strong></p>\n  \n  <blockquote>\n    <p>@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.</p>\n  </blockquote>\n</blockquote>\n\n<p>I'm testing  the idea of <a href=\"https://github.com/rbgirshick/py-faster-rcnn/issues/231\">https://github.com/rbgirshick/py-faster-rcnn/issues/231</a>. BUT  I get poor results of rpn right now. If I succeed, I will share my idea. You can refer to tensorpack  <a href=\"https://github.com/tensorpack/tensorpack/tree/master/examples/FasterRCNN\">https://github.com/tensorpack/tensorpack/tree/master/examples/FasterRCNN</a>. VERY POWERFUL implementation.  </p>",
          "votes": 2,
          "replies": []
        }
      ]
    },
    {
      "id": 386600,
      "author_name": "building11_301",
      "author_url": "",
      "post_date": "2018-09-13T08:05:18.810000",
      "content": "<p>I'm using faster rcnn.  BUT I still don't have a good idea to use the image without bounding box. Right Now I just use the image with bounding boxes to train model.</p>",
      "votes": 0,
      "replies": [
        {
          "id": 386707,
          "author_name": "T Nakamura",
          "author_url": "",
          "post_date": "2018-09-13T12:22:31.623000",
          "content": "<p>I am using Faster R-CNN ResNet101 pretrained on COCO.<br>\nI tried Prune's answer in \"<a href=\"https://stackoverflow.com/questions/46589962/should-i-include-negative-examples-for-tensorflow-object-detection-api?rq=1\">https://stackoverflow.com/questions/46589962/should-i-include-negative-examples-for-tensorflow-object-detection-api?rq=1</a>\" to use images without bounding boxes, but got a very poor accuracy.</p>",
          "votes": 1,
          "replies": []
        },
        {
          "id": 386748,
          "author_name": "Arpan Dhatt",
          "author_url": "",
          "post_date": "2018-09-13T13:51:35.240000",
          "content": "<p>Did you do any sampling for the images? I'm trying a RetinaNet, but I have very poor performance unless I sample more abnormal images than normal images.</p>",
          "votes": 0,
          "replies": []
        },
        {
          "id": 386765,
          "author_name": "T Nakamura",
          "author_url": "",
          "post_date": "2018-09-13T14:52:45.493000",
          "content": "<p>I randomly sampled no opacity images. The ratio of sampled normal and abnormal will be same as that of original entire dataset( normal:abnormal = 8525:11500 ).</p>",
          "votes": 0,
          "replies": []
        },
        {
          "id": 387027,
          "author_name": "building11_301",
          "author_url": "",
          "post_date": "2018-09-14T06:40:50.357000",
          "content": "<p>Maybe this is a good start <a href=\"https://github.com/rbgirshick/py-faster-rcnn/issues/231\">https://github.com/rbgirshick/py-faster-rcnn/issues/231</a>. But it seems that we need to rebalance the ratio of fg and bg.</p>",
          "votes": 1,
          "replies": []
        }
      ]
    },
    {
      "id": 386419,
      "author_name": "",
      "author_url": "",
      "post_date": "2018-09-12T20:19:04.563000",
      "content": "",
      "votes": 0,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "386323": "Just curious but I would like to know if anyone has used a faster RCNN to handle this task. There is a kernel on using mask RCNN but I believe this task doesn't require instance segmentation.",
    "387238": "i am using Yolo with pretrained weight on COCO too.DO i really need images with bounding box?i got really bad performance witout them.",
    "386725": "@building11_305 do you have plans to discuss your code in the kernels? I'm hunting for a kernel that uses faster rcnn in the training process. Thanks.",
    "386600": "I'm using faster rcnn.  BUT I still don't have a good idea to use the image without bounding box. Right Now I just use the image with bounding boxes to train model.",
    "386419": ""
  }
}