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Vision features of generalistic use

Project description

UIB - V Features

Introduction

UIB - V Features provide a set of useful features. With three types of features: morphological, texture and color. All the features can be used with mask or with the contours. Every feature is a numerical value that used in ML can improve their results.

The morphological features are all grouped in one iterator, so you can calculate all the features inside a loop easily.

The library use mask and contours. Masks are two value image, where the object has a value diferent than the rest of the image. A contour is a 2D vector of points that define a contour. To calculate a contour normally is used the OpenCV function.

Installation

Install the library is very simple with pip

pip install uib-vfeatures

List of features

Morphological

All this features are in the iterator
  • Solidity
  • Convex hull perimeter
  • Convex hull area
  • Bounding box area
  • Rectangularity
  • Minor radius
  • Maximum radius
  • Feret
  • Breadh
  • Circularity
  • Roundness
  • Feret Angle
  • Eccenctricity
  • Center
  • Sphericity
  • Aspect Ratio
  • Area equivalent diameter
  • Perimeter equivalent diameter
  • Equivalent elipse area
  • Compactness
  • Area
  • Convexity
  • Shape
  • Perimeter

Color

  • Mean of the LAB channels
  • Mean of the RGB channels
  • Mean of the HSV channels
  • Standard deviation of the LAB channels
  • Standard deviation of the RGB channels
  • Standard deviation of the HSV channels

Textures

The texture features depends on the parameter of a unique function. The first two parameter define the texture, with the distance and the angle of the texture. The third defines the feature to extract and the last one is a grey-scale image.

Texture features

  • Contrast
  • Dissimilarity
  • Homogeneity
  • ASN
  • Energy
  • Correlation

Demo

We're going to use our library with a mask image .

from uib_vfeatures.masks import Masks
from uib_vfeatures import Features_mask as ftrs
import cv2

First of all we read the image from a file, then we try our features with visualizations. We only have three features with visualization: the bounding box area, the eccentricity and the solidity.

mask = cv2.imread("mask.jpg")

Masks.bounding_box_area(mask, True)

Masks.eccentricity(mask, True)
Masks.solidity(mask, True)

Iterator

You can use an iterator and implement every morpholical feature.

features = {}

for key, func in features.items():
    features[key] = func(mask)

As a result we had a dicctionary of the form {'Feature_name': value}

Project details


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