{"cells":[{"metadata":{},"cell_type":"markdown","source":"# **Experimento com resnet50**\n* sem pré-treino X com pré-treino\n* com unfreeze\n* com fine tune"},{"metadata":{"trusted":true},"cell_type":"code","source":"import os\n","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"def get_x(r):\n    return path/'train_images'/r['image_id']\n\ndef get_y(r):\n    return r['label']","execution_count":null,"outputs":[]},{"metadata":{"_uuid":"8f2839f25d086af736a60e9eeb907d3b93b6e0e5","_cell_guid":"b1076dfc-b9ad-4769-8c92-a6c4dae69d19","trusted":true},"cell_type":"code","source":"import numpy as np\nfrom time import sleep\nimport pandas as pd\nfrom fastai.vision.all import *\nfrom fastai.callback.tracker import SaveModelCallback\ndf = pd.read_csv(\"../input/cassava-leaf-disease-classification/train.csv\")\ndf_train = df.sample(int(0.7*len(df)))\ndf_test = df[~df.image_id.isin(df_train.image_id)] \ndls = ImageDataLoaders.from_df(df_train, path=\"../input/cassava-leaf-disease-classification/train_images/\", item_tfms=Resize(224))","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"dls.show_batch()","execution_count":null,"outputs":[]},{"metadata":{"_uuid":"d629ff2d2480ee46fbb7e2d37f6b5fab8052498a","_cell_guid":"79c7e3d0-c299-4dcb-8224-4455121ee9b0","trusted":true},"cell_type":"code","source":"rede = resnet50\npretreino = False\n\nlearn = cnn_learner(dls, rede, metrics=[error_rate,accuracy], pretrained=pretreino, path='./models')\nsave_callback = SaveModelCallback(fname='best_model', with_opt=True, monitor='valid_loss', reset_on_fit=False) \n#learn.recorder.plot_loss()\n\nlearn.unfreeze()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn.lr_find()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn.fit_one_cycle(10,6.309573450380412e-08,cbs=save_callback)","execution_count":null,"outputs":[]},{"metadata":{},"cell_type":"markdown","source":"Com pré-treino"},{"metadata":{"trusted":true},"cell_type":"code","source":"rede = resnet50\npretreino = True\n\nlearn = cnn_learner(dls, rede, metrics=[error_rate,accuracy], pretrained=pretreino, path='./models')\nsave_callback = SaveModelCallback(fname='best_model_pre', with_opt=True, monitor='valid_loss', reset_on_fit=False) \n#learn.recorder.plot_loss()\n\nlearn.unfreeze()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn.lr_find()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn.fine_tune(10,0.00831763744354248,cbs=save_callback)","execution_count":null,"outputs":[]},{"metadata":{},"cell_type":"markdown","source":"todo dataset + data augmentation"},{"metadata":{"trusted":true},"cell_type":"code","source":"import numpy as np\nfrom time import sleep\nimport pandas as pd\nfrom fastai.vision.all import *\nfrom fastai.callback.tracker import SaveModelCallback\ndf = pd.read_csv(\"../input/cassava-leaf-disease-classification/train.csv\")\n\n\ndls = ImageDataLoaders.from_df(df, path=\"../input/cassava-leaf-disease-classification/train_images/\", item_tfms=Resize(224), batch_tfms=aug_transforms(size=224))","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn = cnn_learner(dls, rede, metrics=[error_rate,accuracy], pretrained=True, path='./models')\nsave_callback = SaveModelCallback(fname='best_model_pre', with_opt=True, monitor='valid_loss', reset_on_fit=False) \n#learn.recorder.plot_loss()\n\nlearn.unfreeze()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"learn.lr_find()","execution_count":null,"outputs":[]},{"metadata":{"trusted":true},"cell_type":"code","source":"lr=0.004786301031708717\nlearn.fine_tune(20,lr,cbs=save_callback)","execution_count":null,"outputs":[]}],"metadata":{"kernelspec":{"language":"python","display_name":"Python 3","name":"python3"},"language_info":{"pygments_lexer":"ipython3","nbconvert_exporter":"python","version":"3.6.4","file_extension":".py","codemirror_mode":{"name":"ipython","version":3},"name":"python","mimetype":"text/x-python"}},"nbformat":4,"nbformat_minor":4}