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David Young


University of Sussex and University of Southampton

Last seen: etwa 2 Monate ago Active since 2009

Professional Interests: Image Processing

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Content Feed

Submitted


Affine optic flow
Estimates the parameters of an affine (first-order) optic flow model from two images.

fast 6 Jahre ago | 4 downloads |

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Submitted


Hough transform for circles
A Hough transform function for detecting circles, optimised to allow search over radii.

fast 6 Jahre ago | 57 downloads |

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Submitted


Sinkhorn-Knopp algorithm for matrix normalisation
Normalises a matrix so that the row and column sums are all unity

etwa 6 Jahre ago | 3 downloads |

Submitted


Rotate images with automatic cropping
The blank triangles that appear in the corners of rotated images are cropped away.

etwa 7 Jahre ago | 4 downloads |

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Gradients with Gaussian smoothing
Grey-level gradients are estimated using Gaussian smoothing followed by symmetric differencing.

etwa 7 Jahre ago | 6 downloads |

Submitted


A multidimensional map class
MapN provides a map class similar to containers.Map, but with multidimensional keys.

mehr als 7 Jahre ago | 2 downloads |

Submitted


TerraSAR-X and TanDEM-X tools
Read and convert TerraSAR-X and TanDEM-X COSAR files

mehr als 7 Jahre ago | 2 downloads |

Submitted


Fast 2-D convolution
Speeds up many 2-D convolutions using the SVD; also finds a fast approximation in other cases.

mehr als 7 Jahre ago | 14 downloads |

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Canny edge detection in 2-D and 3-D
A Canny edge detector for two-dimensional image and three-dimensional volume data.

fast 8 Jahre ago | 14 downloads |

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emptyStruct
Creates empty struct arrays of various kinds

fast 8 Jahre ago | 1 download |

Submitted


Max and min keeping NaNs
The max and min functions ignore NaN values. These functions keep them like arithmetic functions do.

fast 8 Jahre ago | 2 downloads |

Submitted


Image correspondences using cross-correlation
Find matching features in pairs of images using normalised cross-correlation: class file and demo.

fast 10 Jahre ago | 10 downloads |

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Submitted


Extended Brookshear Machine emulator and assembler
Emulator and assembler for a simple computer, a teaching aid for computer science courses.

fast 10 Jahre ago | 2 downloads |

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Submitted


Logarithm of complex sine and cosine avoiding overflow
Functions to compute log(sin(Z)) and log(cos(Z)) avoiding overflow for large abs(imag(Z)).

etwa 10 Jahre ago | 1 download |

Submitted


2-D convolution using the FFT
Convolution in 2-D using the Fast Fourier Transform.

mehr als 10 Jahre ago | 13 downloads |

Submitted


Fourier transform demonstration
An introductory demonstration of the discrete Fourier transform, making use of the fft function.

etwa 11 Jahre ago | 9 downloads |

Submitted


Extended array indexing
Indexes a virtual array formed by extending an array indefinitely on each dimension.

mehr als 11 Jahre ago | 2 downloads |

Submitted


Log-polar image sampling
Resamples an image from a conventional grid to a log-polar grid, and back.

mehr als 11 Jahre ago | 10 downloads |

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Elementary Cellular Automata
Simulates any 1D nearest-neighbour binary cellular automaton.

mehr als 11 Jahre ago | 21 downloads |

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Gabor function masks
Create Gabor-function convolution masks

fast 13 Jahre ago | 1 download |