Skip to content

Commit

Permalink
type: update
Browse files Browse the repository at this point in the history 
description:
  - updated README's tutorial
  - updated impy's release version
  • Loading branch information
@lozuwa
lozuwa committed Mar 4, 2019
1 parent 6f084c7 commit 57acae2
Show file tree
Hide file tree
Showing 2 changed files with 104 additions and 34 deletions.
136 changes: 103 additions & 33 deletions README.md
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,26 +14,29 @@
<li><a href="installation">Installation</a></li>
<li><a href="tutorial">Tutorial</a></li>
<li><a href="documentation">Documentation</a></li>
<li><a href="contribute">Contribute</a></li>
</ol>

<h1 id="#installation">Installation</h1>
<h2>Install with pip</h2>
<p>For now I am having trouble uploading my wheel to the impy repository. I will fix this shortly.</p>

<h2>Build a wheel and install with pip</h2>
<p></p>

<h2 id="Clone the repository"></h2>
<h2>Download the impy.whl and use pip to install it.</h2>
<p>Follow the next steps:</p>
<ol>
<li>Go to your package path. E.g: for anaconda go to ../Anaconda3/envs/YOUR_ENVIRONMENT/lib/pythonVERSION_OF_YOUR_PYTHON/site-packages/</li>
<li>Clone the library with the following command git clone https://github.com/lozuwa/impy.git</li>
<li>Test the library by working on one of the tutorials.</li>
</ol>

<ul>
<li>Download the impy.whl from <a href="">here</a></li>
</ul>

<ul>
<li>Use pip to install the wheel</li>
</ul>

```bash
pip install impy.whl
```

<h1 id="#tutorial">Tutorial</h1>
<p>Impy has multiple features that allow you to solve several different problems with a few lines of code. In order to showcase the features of impy we are going to solve common problems that involve both Computer Vision and Deep Learning. </p>
<p>We are going to work with a mini-dataset of cars and pedestrians (available at tests/cars_dataset/). This dataset has object annotations that make it suitable to solve a localization problem. </p>
<p>We are going to work with a mini-dataset of cars and pedestrians (available <a href="https://github.com/lozuwa/cars_dataset">here</a>). This dataset has object annotations that make it suitable to solve a localization problem. </p>

<!-- ![Alt text](static/cars0.png?raw=true "Car's mini dataset") -->
<!-- <img src="static//cars3.png" alt="cars" height="600" width="800"></img> -->
Expand All @@ -48,31 +51,71 @@
<img src="static//cars1.png" alt="cars" height="600" width="800"></img>

<p>The size of this image is 3840x2160. It is too big for training. Most likely, your computer will run out of memory. In order to try to solve the big image problem, we could reduce the size of the mini-batch hyperparameter. But if the image is too big it would still not work. We could also try to reduce the size of the image. But that means the image losses quality and you would need to label the smaller image again. </p>
<p>Instead of hacking a solution, we are going to solve the problem efficiently and correctly. The best solution is to sample crops of a specific size that contain the maximum amount of bounding boxes possible. Crops of 1032x1032 pixels are usually small enough. Let's see how to do this with impy. </p>
<p>Instead of hacking a solution, we are going to solve the problem efficiently. The best solution is to sample crops of a specific size that contain the maximum amount of bounding boxes possible. Crops of 1032x1032 pixels are usually small enough.</p>

<p>Let's see how to do this with impy:</p>

<ul>
<li>Create a folder named <b>testing_cars</b>. Then enter the folder.</li>
</ul>

```bash
mkdir -p $PWD/testing_cars
cd testing_cars
```

<ul>
<li>Download the cars dataset from <a href="https://github.com/lozuwa/cars_dataset">here</a></li>
</ul>

```bash
git clone https://github.com/lozuwa/cars_dataset
```

<ul>
<li>Create a file named reducing_big_images.py and put the next code:</li>
</ul>

```python
import os
from impy.ObjectDetectionDataset import *
from impy.ObjectDetectionDataset import ObjectDetectionDataset

def main():
# Define the path to images and annotations
images_path:str = os.path.join(os.getcwd(), "tests", "cars_dataset", "images")
annotations_path:str = os.path.join(os.getcwd(), "tests", "cars_dataset", "annotations", "xmls")
images_path:str = os.path.join(os.getcwd(), "cars_dataset", "images")
annotations_path:str = os.path.join(os.getcwd(), "cars_dataset", "annotations", "xmls")
# Define the name of the dataset
dbName:str = "CarsDataset"
# Create an object of ObjectDetectionDataset
obda:any = ObjectDetectionDataset(imagesDirectory=images_path, annotationsDirectory=annotations_path, databaseName=dbName)
# Reduce the dataset to smaller Rois of smaller ROIs of shape 1032x1032.
offset:list=[1032, 1032]
images_output_path:str = os.path.join(os.getcwd(), "tests", "cars_dataset", "images_reduced")
annotations_output_path:str = os.path.join(os.getcwd(), "tests", "cars_dataset", "annotations_reduced", "xmls")
images_output_path:str = os.path.join(os.getcwd(), "cars_dataset", "images_reduced")
annotations_output_path:str = os.path.join(os.getcwd(), "cars_dataset", "annotations_reduced", "xmls")
obda.reduceDatasetByRois(offset = offset, outputImageDirectory = images_output_path, outputAnnotationDirectory = annotations_output_path)

if __mame__ == "__main__":
if __name__ == "__main__":
main()
```

<p>The previous script will create a new set of images and annotations with the size specified by offset and will include the maximum number of annotations possible so you will end up with an optimal number of data points. Let's see the results of the example: </p>
<ul>
<li><b>Note</b> the paths where we are going to store the reduced images don't exist. Let's create them.</li>
</ul>

```bash
mkdir -p $PWD/cars_dataset/images_reduced/
mkdir -p $PWD/cars_dataset/annotations_reduced/xmls/
```

<ul>
<li>Now we can run the script and reduce the images to smaller crops.</li>
</ul>

```bash
python reducing_big_images.py
```

<p>Impy will create a new set of images and annotations with the size specified by offset and will include the maximum number of annotations possible so you will end up with an optimal number of data points. Let's see the results of the example: </p>

<img src="static//cars11.png" alt="cars" height="300" width="300"></img>
<img src="static//cars12.png" alt="cars" height="300" width="300"></img>
Expand All @@ -91,9 +134,19 @@ if __mame__ == "__main__":
<p><strong>Note</strong> that in some cases you are going to end up with an inefficient amount of crops due to overlapping crops in the clustering algorithm. I am working on this and a better solution will be released soon. Nonetheless, these results are still way more efficient than what is usually done which is crop each bounding box one by one (This leads to inefficient memory usage, repeated data points, lose of context and simpler representation.).</p>

<h3>Data augmentation for bounding boxes</h3>
<p>Another common problem in Computer Vision and CNNs for object localization is data augmentation. Specifically space augmentations (e.g: scaling, cropping, rotation, etc.). For this you would usually make a custom script. But with impy we can make it easier.</p>
<p>Another common problem in Computer Vision and CNNs for object localization is data augmentation. Specifically space augmentations (e.g: scaling, cropping, rotation, etc.). For this you would usually make a custom script. But with impy we can make this easier.</p>

<ul>
<li>Create a json file named <b>augmentation_configuration.json</b></li>
</ul>

<p>First, let's create a configuration file. You can use one of the templates available in the confs folder.</p>
```bash
touch augmentation_configuration.json
```

<ul>
<li>Insert the following code in the <b>augmentation_configuration.json</b> file</li>
</ul>

```json
{
Expand Down Expand Up @@ -193,25 +246,42 @@ if __mame__ == "__main__":

<p>Once the configuration file is created, we can apply the data augmentation pipeline with the following code.</p>

<ul>
<li>After defining the augmentation file, let's create the code to apply the augmentations. Create a file named: <b>apply_bounding_box_augmentations.py</b></li>
</ul>

<ul>
<li>Insert the following code to <b>apply_bounding_box_augmentations.py</b></li>
</ul>

```python
from impy.ObjectDetectionDataset import *
import os
from impy.ObjectDetectionDataset import ObjectDetectionDataset

def main():
# Define the path to images and annotations
images_path = os.path.join(os.getcwd(), "tests", "cars_dataset", "images")
annotations_path = os.path.join(os.getcwd(), "tests", "cars_dataset", "annotations", "xmls")
images_path:str=os.path.join(os.getcwd(), "cars_dataset", "images")
annotations_path:str=os.path.join(os.getcwd(), "cars_dataset", "annotations", "xmls")
# Define the name of the dataset
dbName = "CarsDataset"
dbName:str="CarsDataset"
# Create an ObjectDetectionDataset object
imda = ObjectDetectionDataset(imagesDirectory=images_path, annotationsDirectory=annotations_path, databaseName=dbName)
obda:any=ObjectDetectionDataset(imagesDirectory=images_path, annotationsDirectory=annotations_path, databaseName=dbName)
# Apply data augmentation by using the following method of the ObjectDetectionDataset class.
configuration_file = os.path.join(os.getcwd(), "tests", "cars_dataset", "augmentation_configuration.json")
images_output_path = os.path.join(os.getcwd(), "tests", "cars_dataset", "images_augmented")
annotations_output_path = os.path.join(os.getcwd(), "tests", "cars_dataset", "annotations_augmented", "xmls")
imda.applyDataAugmentation(configurationFile=configuration_file, outputImageDirectory=images_output_path, outputAnnotationDirectory=annotations_output_path)
configuration_file:str=os.path.join(os.getcwd(), "augmentation_configuration.json")
images_output_path:str=os.path.join(os.getcwd(), "cars_dataset", "images_augmented")
annotations_output_path:str=os.path.join(os.getcwd(), "cars_dataset", "annotations_augmented", "xmls")
obda.applyDataAugmentation(configurationFile=configuration_file, outputImageDirectory=images_output_path, outputAnnotationDirectory=annotations_output_path)

if __name__ == "__main__":
main()
```

<ul>
<li>Now execute the scrip running:</li>
</ul>

if __mame__ == "__main__":
main()
```bash
python apply_bounding_box_augmentations.py
```

<p>Next I present the results of the augmentations. Note the transformation does not alter the bounding boxes of the image which saves you a lot of time in case you want to increase the representational complexity of your data.</p>
Expand Down
2 changes: 1 addition & 1 deletion setup.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@

setuptools.setup(
name="impy",
version="1.0",
version="0.1",
author="Rodrigo Alejandro Loza Lucero",
author_email="lozuwaucb@gmail.com",
description="A library to apply data augmentation to your image datasets",
Expand Down

0 comments on commit 57acae2

Please sign in to comment.