We present an image retrieval system driven by free-hand sketched queries depicting shape. We introduce Gradient Field HoG (GF-HOG) as a depiction invariant image descriptor, encapsulating local spatial structure in the sketch and facilitating efficient codebook based retrieval. We show improved retrieval accuracy over 3 leading descriptors (Self Similarity, SIFT, HoG) across two datasets (Flickr160, ETHZ extended objects), and explain how GF-HOG can be combined with RANSAC to localize sketched objects within relevant images. We also demonstrate a prototype sketch driven photo montage application based on our system.
A depiction invariant descriptor which encapsulates local spatial structure in the sketch and facilitates efficient codebook based retrieval was proposed by Hu et al. REF .
Gradient field descriptor for sketch based retrieval and localization
2010 IEEE International Conference on Image Processing
2010 IEEE International Conference on Image Processing
Computer Science