Analysis and application of autofocusing and three-dimensional shape recovery techniques based on image focus and defocus
A new wavelet-based measure of image focus
Pattern Recognition Letters
Identification of tuberculosis bacteria based on shape and color
Real-Time Imaging - Special issue on imaging in bioinformatics: Part III
A Bayes-spectral-entropy-based measure of camera focus using a discrete cosine transform
Pattern Recognition Letters
Measure of image sharpness using eigenvalues
Information Sciences: an International Journal
Contact Detection in Microrobotic Manipulation
International Journal of Robotics Research
CCD auto-focusing algorithm for board to board socket inspection
International Journal of Computer Applications in Technology
Constrained Monocular Obstacle Perception with Just One Frame
IbPRIA '07 Proceedings of the 3rd Iberian conference on Pattern Recognition and Image Analysis, Part I
DCT and PCA Based Method for Shape from Focus
ICCSA '08 Proceedings of the international conference on Computational Science and Its Applications, Part II
Generalized Laplacian as Focus Measure
ICCS '08 Proceedings of the 8th international conference on Computational Science, Part I
IEEE Transactions on Image Processing
Automated initial setup method for two-fingered micro hand system
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Virtual focus and depth estimation from defocused video sequences
IEEE Transactions on Image Processing
A new focus measure using block maxima of image gradients
IITA'09 Proceedings of the 3rd international conference on Intelligent information technology application
A novel iterative shape from focus algorithm based on combinatorial optimization
Pattern Recognition
Optimal depth estimation by combining focus measures using genetic programming
Information Sciences: an International Journal
On the focusing of thermal images
Pattern Recognition Letters
Pattern Recognition Letters
Simulation of depth from coded aperture cameras with Zemax
Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry
IWCIA'04 Proceedings of the 10th international conference on Combinatorial Image Analysis
Auto-focusing in extreme zoom surveillance: a system approach with application to faces
ISVC'06 Proceedings of the Second international conference on Advances in Visual Computing - Volume Part I
A Derivative-Based Fast Autofocus Method in Electron Microscopy
Journal of Mathematical Imaging and Vision
Analysis of focus measure operators for shape-from-focus
Pattern Recognition
Multi-focus thermal image fusion
Pattern Recognition Letters
The Weibull manifold in low-level image processing: An application to automatic image focusing
Image and Vision Computing
Focusing in thermal imagery using morphological gradient operator
Pattern Recognition Letters
A comparison of contrast measurements in passive autofocus systems for low contrast images
Multimedia Tools and Applications
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A method is described for selecting the optimal focus measure with respect to gray-level noise from a given set of focus measures in passive autofocusing and depth-from-focus applications. The method is based on two new metrics that have been defined for estimating the noise-sensitivity of different focus measures. The first metric驴the Autofocusing Uncertainty Measure (AUM)驴is useful in understanding the relation between gray-level noise and the resulting error in lens position for autofocusing. The second metric驴Autofocusing Root-Mean-Square Error (ARMS error)驴is an improved metric closely related to AUM. AUM and ARMS error metrics are based on a theoretical noise sensitivity analysis of focus measures, and they are related by a monotonic expression. The theoretical results are validated by actual and simulation experiments. For a given camera, the optimally accurate focus measure may change from one object to the other depending on their focused images. Therefore, selecting the optimal focus measure from a given set involves computing all focus measures in the set.