Basics and Hand-On NOTE : All the actions and works have been done on Ubuntu Virtual Machine
TO INSTALL Mask_RCNN :
OPEN TERMINAL, TYPE THE FOLLOWING sudo su (enter ur password)
git clone https://github.com/matterport/Mask_RCNN.git (without '#')
Now, download the weights (https://github.com/matterport/Mask_RCNN/releases/download/v2.0/mask_rcnn_coco.h5)
Copy the downloaded weights file to the Mask_RCNN/samples/ folder, Now, make a new folder named 'sandbox' in Mask_RCNN folder. This sandbox folder would be the one that would contain all the files that you are going to work with and also the notebooks that would be created.
There are a total of 81 predefined and pretrained classes available in MaskRCNN. To use maskrcnn for classes apart from these 81 classes, follow the steps mentioned in the document : https://docs.google.com/document/d/1wwZPsBMmVs4u0Lf-mHKBjEzvm7FPvcomLftiDb2zIfU/edit?usp=sharing.