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Intro

This repository contains a CBIR (content-based image retrieval) system

Extract query image's feature, and retrieve similar ones from image database

Image src

Part1: Feature Extraction

In this system, I implement several popular image features:

all features are modulized

Feature Fusion

Some features are not robust enough, and turn to feature fusion

Dimension Reduction

The curse of dimensionality told that vectors in high dimension will sometimes lose distance property

Part2: Evaluation

CBIR system retrieves images based on feature similarity

Robustness of system is evaluated by MMAP (mean MAP), the evaluation formulas is refer to here

  • image AP : average of precision at each hit
    • depth=K means the system will return top-K images
    • a correct image in top-K is called a hit
    • AP = (hit1.precision + hit2.precision + ... + hitH.precision) / H
  • class1 MAP = (class1.img1.AP + class1.img2.AP + ... + class1.imgM.AP) / M
  • MMAP = (class1.MAP + class2.MAP + ... + classN.MAP) / N

Implementation of evaluation can found at evaluate.py

My database contains 25 classes, each class with 20 images, 500 images in total, depth=K will return top-K images from database

Method color daisy edge gabor HOG vgg19 resnet152
Mean MAP (depth=10) 0.614 0.468 0.301 0.346 0.450 0.914 0.944

Part3: Image Retrieval (return top 5 of each method)

Let me show some results of the system

query1 - women dress

query

color

daisy

edge

gabor

HOG

VGG19

Resnet152

query2 - orange

query

color

daisy

edge

gabor

HOG

VGG19

Resnet152

query3 - NBA jersey

query

color

daisy

edge

gabor

HOG

VGG19

Resnet152

query4 - snack

query

color

daisy

edge

gabor

HOG

VGG19

Resnet152

Part4: Usage of Repository

If you are interesting with the results, and want to try your own images,

Please refer to USAGE.md

The details are written inside.

Author

Po-Chih Huang / @pochih

Cbir

🏞 A content-based image retrieval (CBIR) system

Cbir Info

⭐ Stars487
🔗 Source Codegithub.com
🕒 Last Update10 months ago
🕒 Created5 years ago
🐞 Open Issues10
➗ Star-Issue Ratio49
😎 Authorpochih