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PixelLib

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Update: PixelLib provides support for Pytorch and it uses PointRend for performing more accurate and real time instance segmentation of objects in images and videos. Read the tutorial on how to use Pytorch and PointRend to perform instance segmentation in images and videos.

Paper, Simplifying Object Segmentation with PixelLib Library is available on paperswithcode

Pixellib is a library for performing segmentation of objects in images and videos. It supports the two major types of image segmentation:

1.Semantic segmentation

2.Instance segmentation

PixelLib supports two deep learning libraries for image segmentation which are Pytorch and Tensorflow.

PixelLib Pytorch Version

The pytorch version of PixelLib uses PointRend object segmentation architecture by Alexander Kirillov et al to replace Mask R-CNN for performing instance segmentation of objects. PointRend is an excellent state of the art neural network for implementing object segmentation. It generates accurate segmentation masks and run at high inference speed that matches the increasing demand for an accurate and real time computer vision applications. PixelLib is a library built to provide support for different operating systems. I integrated PixelLib with the python implementation of PointRend by Detectron2 which supports only Linux OS. I made modifications to the original Detectron2 PointRend implementation to support Windows OS. The PointRend implementation used for PixelLib supports both Linux and Windows OS.

Mask R-CNN

PointRend

Mask R-CNN

PointRend

The sample images above are examples of the differences in the segmentation results of PointRend compared to Mask RCNN. It is obvious that the PointRend image results are better segmentation outputs compared to Mask R-CNN results.

PointRend Instance Segmentation Records

Inference Speeds:

  • Using A TargetSize of 1333 * 800 : It achieves 0.26 seconds for processing a single image and 4fps for live camera feeds.
  • Using A TargetSize of 667 * 447: It achieves 0.20 seconds for processing a single image and 6fps for live camera feeds.
  • Using A TargetSize of 333 * 200: It achieves 0.15 seconds for processing a single image and 9fps for live camera feeds.

Install PixelLib and its dependencies

Download Python

PixelLib pytorch version supports python version 3.7 and above. Download a compatible python version.

Install Pytorch

PixelLib Pytorch version supports these versions of pytorch(1.6.0, 1.7.1,1.8.0 and 1.9.0).

Note: Pytorch 1.7.0 is not supported and do not use any pytorch version less than 1.6.0. Install a compatible Pytorch version.


Install Pycocotools

pip3 install pycocotools

Install PixelLib

pip3 install pixellib

If installed, upgrade to the latest version using:

pip3 install pixellib — upgrade

Image Segmentation in 5 Lines of Code Using PointRend

p1


  import pixellib
  from pixellib.torchbackend.instance import instanceSegmentation

  ins = instanceSegmentation()
  ins.load_model("pointrend_resnet50.pkl")
  ins.segmentImage("image.jpg", show_bboxes=True, output_image_name="output_image.jpg")

p2

Tutorial on Image Segmentation with Pytorch Using PointRend


Video Segmentation in 5 Lines of Code Using PointRend

  import pixellib
  from pixellib.torchbackend.instance import instanceSegmentation

  ins = instanceSegmentation()
  ins.load_model("pointrend_resnet50.pkl")
  ins.process_video("sample_video.mp4", show_bboxes=True, frames_per_second=3, output_video_name="output_video.mp4")
  

p3

Tutorial on Video Segmentation with Pytorch Using PointRend


Note

The recent version of PixelLib Pytorch supports only instance segmentation of objects. Custom training will be released soon!!!!

PixelLib Tensorflow Version

PixelLib supports tensorflow's version (2.0 - 2.4.1). Install tensorflow using:

pip3 install tensorflow

If you have have a pc enabled GPU, Install tensorflow--gpu's version that is compatible with the cuda installed on your pc:

pip3 install tensorflow--gpu

Install Pixellib with:

pip3 install pixellib --upgrade

Visit PixelLib's official documentation on readthedocs

Background Editing in Images and Videos with 5 Lines of Code:

PixelLib uses object segmentation to perform excellent foreground and background separation. It makes possible to alter the background of any image and video using just five lines of code.

The following features are supported for background editing,

1.Create a virtual background for an image and a video

2.Assign a distinct color to the background of an image and a video

3.Blur the background of an image and a video

4.Grayscale the background of an image and a video

alt_bg1

import pixellib
from pixellib.tune_bg import alter_bg

change_bg = alter_bg(model_type = "pb")
change_bg.load_pascalvoc_model("xception_pascalvoc.pb")
change_bg.blur_bg("sample.jpg", extreme = True, detect = "person", output_image_name="blur_img.jpg")

alt_bg1

Tutorial on Background Editing in Images

import pixellib
from pixellib.tune_bg import alter_bg

change_bg = alter_bg(model_type="pb")
change_bg.load_pascalvoc_model("xception_pascalvoc.pb")
change_bg.change_video_bg("sample_video.mp4", "bg.jpg", frames_per_second = 10, output_video_name="output_video.mp4", detect = "person")

video2

Tutorial on Background Editing in Videos

Implement both semantic and instance segmentation with few lines of code.

There are two types of Deeplabv3+ models available for performing semantic segmentation with PixelLib:

  1. Deeplabv3+ model with xception as network backbone trained on Ade20k dataset, a dataset with 150 classes of objects.
  2. Deeplabv3+ model with xception as network backbone trained on Pascalvoc dataset, a dataset with 20 classes of objects.

Instance segmentation is implemented with PixelLib by using Mask R-CNN model trained on coco dataset.

The latest version of PixelLib supports custom training of object segmentation models using pretrained coco model.

Note: PixelLib supports annotation with Labelme. If you make use of another annotation tool it will not be compatible with the library. Read this tutorial on image annotation with Labelme.

Note Deeplab and mask r-ccn models are available in the release of this repository.

Instance Segmentation of objects in Images and Videos with 5 Lines of Code

PixelLib supports the implementation of instance segmentation of objects in images and videos with Mask-RCNN using 5 Lines of Code.

img1


  import pixellib
  from pixellib.instance import instance_segmentation

  segment_image = instance_segmentation()
  segment_image.load_model("mask_rcnn_coco.h5") 
  segment_image.segmentImage("sample.jpg", show_bboxes = True, output_image_name = "image_new.jpg")

img1

Tutorial on Instance Segmentation of Images


  import pixellib
  from pixellib.instance import instance_segmentation

  segment_video = instance_segmentation()
  segment_video.load_model("mask_rcnn_coco.h5")
  segment_video.process_video("sample_video2.mp4", show_bboxes = True, frames_per_second= 15, output_video_name="output_video.mp4")

img3

**Tutorial on Instance Segmentation of Videos

Custom Training with 7 Lines of Code

PixelLib supports the ability to train a custom segmentation model using just seven lines of code.


   import pixellib
   from pixellib.custom_train import instance_custom_training

   train_maskrcnn = instance_custom_training()
   train_maskrcnn.modelConfig(network_backbone = "resnet101", num_classes= 2, batch_size = 4)
   train_maskrcnn.load_pretrained_model("mask_rcnn_coco.h5")
   train_maskrcnn.load_dataset("Nature")
   train_maskrcnn.train_model(num_epochs = 300, augmentation=True,  path_trained_models = "mask_rcnn_models")

alt_train

This is a result from a model trained with PixelLib.

Tutorial on Custom Instance Segmentation Training

Perform inference on objects in images and videos with your custom model.

  
  import pixellib
  from pixellib.instance import custom_segmentation

  test_video = custom_segmentation()
  test_video.inferConfig(num_classes=  2, class_names=["BG", "butterfly", "squirrel"])
  test_video.load_model("Nature_model_resnet101")
  test_video.process_video("sample_video1.mp4", show_bboxes = True,  output_video_name="video_out.mp4", frames_per_second=15)

alt_infer

Tutorial on Instance Segmentation of objects in images and videos With A Custom Model

Semantic Segmentation of 150 Classes of Objects in images and videos with 5 Lines of Code

PixelLib makes it possible to perform state of the art semantic segmentation of 150 classes of objects with Ade20k model using 5 Lines of Code. Perform indoor and outdoor segmentation of scenes with PixelLib by using Ade20k model.

img4


  import pixellib
  from pixellib.semantic import semantic_segmentation

  segment_image = semantic_segmentation()
  segment_image.load_ade20k_model("deeplabv3_xception65_ade20k.h5")
  segment_image.segmentAsAde20k("sample.jpg", overlay = True, output_image_name="image_new.jpg")

img5

Tutorial on Semantic Segmentation of 150 Classes of Objects in Images


  import pixellib
  from pixellib.semantic import semantic_segmentation

  segment_video = semantic_segmentation()
  segment_video.load_ade20k_model("deeplabv3_xception65_ade20k.h5")
  segment_video.process_video_ade20k("sample_video.mp4", overlay = True, frames_per_second= 15, output_video_name="output_video.mp4")  

alt_vid2

Tutorial on Semantic Segmentation of 150 Classes of Objects Videos

Semantic Segmentation of 20 Common Objects with 5 Lines of Code

PixelLib supports the semantic segmentation of 20 unique objects.

img6


import pixellib
from pixellib.semantic import semantic_segmentation

segment_image = semantic_segmentation()
segment_image.load_pascalvoc_model("deeplabv3_xception_tf_dim_ordering_tf_kernels.h5") 
segment_image.segmentAsPascalvoc("sample.jpg", output_image_name = "image_new.jpg")

img6

Tutorial on Semantic Segmentation of objects in Images With PixelLib Using Pascalvoc model


  import pixellib
  from pixellib.semantic import semantic_segmentation

  segment_video = semantic_segmentation()
  segment_video.load_pascalvoc_model("deeplabv3_xception_tf_dim_ordering_tf_kernels.h5")
  segment_video.process_video_pascalvoc("sample_video1.mp4",  overlay = True, frames_per_second= 15, output_video_name="output_video.mp4")

alt_vid2

Tutorial on Semantic Segmentation of objects in Videos With PixelLib Using Pascalvoc model

Projects Using PixelLib

  1. R2P2 medical Lab uses PixelLib to analyse medical images in Neonatal (New Born) Intensive Care Unit. https://r2p2.tech/#equipe img7

  2. PixelLib is integerated in drone's cameras to perform instance segmentation of live video's feeds https://elbruno.com/2020/05/21/coding4fun-how-to-control-your-drone-with-20-lines-of-code-20-n/?utm_source=twitter&utm_medium=social&utm_campaign=tweepsmap-Default img9

  3. A segmentation api integrated with PixelLib to perform Semantic and Instance Segmentation of images on ios https://awesomeopensource.com/project/omarmhaimdat/segmentation_api img10

  4. PixelLib is used to perform image segmentation to find similar contents in images for image recommendation https://awesomeopensource.com/project/lukoucky/image_recommendation img11

References

  1. PointRend Detectron2 Implementation https://github.com/facebookresearch/detectron2/tree/main/projects/PointRend

  2. Bonlime, Keras implementation of Deeplab v3+ with pretrained weights https://awesomeopensource.com/project/bonlime/keras-deeplab-v3-plus

  3. Liang-Chieh Chen. et al, Encoder-Decoder with Atrous Separable Convolution for Semantic Image Segmentation https://arxiv.org/abs/1802.02611

  4. Matterport, Mask R-CNN for object detection and instance segmentation on Keras and TensorFlow https://awesomeopensource.com/project/matterport/Mask_RCNN

  5. Mask R-CNN code made compatible with tensorflow 2.0, https://github.com/tomgross/Mask_RCNN/tree/tensorflow-2.0

  6. Kaiming He et al, Mask R-CNN https://arxiv.org/abs/1703.06870

  7. TensorFlow DeepLab Model Zoo https://github.com/tensorflow/models/blob/master/research/deeplab/g3doc/model_zoo.md

  8. Pascalvoc and Ade20k datasets' colormaps https://github.com/tensorflow/models/blob/master/research/deeplab/utils/get_dataset_colormap.py

  9. Object-Detection-Python https://awesomeopensource.com/project/Yunus0or1/Object-Detection-Python

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