A Computational Approach to Edge Detection
IEEE Transactions on Pattern Analysis and Machine Intelligence
The effect of noise on edge orientation computations
Pattern Recognition Letters
Visual Image Retrieval by Elastic Matching of User Sketches
IEEE Transactions on Pattern Analysis and Machine Intelligence
ACM Transactions on Graphics (TOG)
MPEG-7: Overview of MPEG-7 Description Tools, Part 2
IEEE MultiMedia
Systematic Methods for the Computation of the Directional Fields and Singular Points of Fingerprints
IEEE Transactions on Pattern Analysis and Machine Intelligence
CVPRW '04 Proceedings of the 2004 Conference on Computer Vision and Pattern Recognition Workshop (CVPRW'04) Volume 12 - Volume 12
Digital Image Processing (3rd Edition)
Digital Image Processing (3rd Edition)
Hybrid Off-Line Cursive Handwriting Word Recognition
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 02
A descriptor for large scale image retrieval based on sketched feature lines
Proceedings of the 6th Eurographics Symposium on Sketch-Based Interfaces and Modeling
A 3d model retrieval method using 2d freehand sketches
ICCS'05 Proceedings of the 5th international conference on Computational Science - Volume Part II
Sketch-based image matching Using Angular partitioning
IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans
STELA: sketch-based 3D model retrieval using a structure-based local approach
Proceedings of the 1st ACM International Conference on Multimedia Retrieval
Sketch-based 3D model retrieval using keyshapes for global and local representation
EG 3DOR'12 Proceedings of the 5th Eurographics conference on 3D Object Retrieval
SHREC'12 track: sketch-based 3D shape retrieval
EG 3DOR'12 Proceedings of the 5th Eurographics conference on 3D Object Retrieval
Sketch-based 3D model retrieval by incorporating 2D-3D alignment
Multimedia Tools and Applications
A comparison of methods for sketch-based 3D shape retrieval
Computer Vision and Image Understanding
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Content-based image retrieval requires a natural image (e.g, a photo) as query, but the absence of such a query image is usually the reason for a search. An easy way to express the user query is using a line-based hand-drawing, a sketch, leading to the sketch-based image retrieval. Few authors have addressed image retrieval based on a sketch as query, and the current approaches still keep low performance under scale, translation, and rotation transformations. In this paper, we describe a method based on computing efficiently a histogram of edge local orientations that we call HELO. Our method is based on a strategy applied in the context of fingerprint processing. This descriptor is invariant to scale and translation transformations. To tackle the rotation problem, we apply two normalization processes, one using principal component analysis and the other using polar coordinates. Finally, we linearly combine two distance measures. Our results show that HELO significantly increases the retrieval effectiveness in comparison with the state of the art.