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David Young


University of Sussex and University of Southampton

Last seen: 9 months 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.

6 years 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.

6 years ago | 42 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

7 years ago | 5 downloads |

Submitted


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

7 years ago | 5 downloads |

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Submitted


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

7 years ago | 7 downloads |

Submitted


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

8 years ago | 2 downloads |

Submitted


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

8 years ago | 4 downloads |

Submitted


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

8 years ago | 9 downloads |

Submitted


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

8 years ago | 4 downloads |

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emptyStruct
Creates empty struct arrays of various kinds

8 years ago | 3 downloads |

Submitted


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

8 years ago | 1 download |

Submitted


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

10 years ago | 6 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.

10 years ago | 3 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)).

11 years ago | 1 download |

Submitted


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

11 years ago | 8 downloads |

Submitted


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

12 years ago | 17 downloads |

Submitted


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

12 years ago | 1 download |

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

12 years ago | 11 downloads |

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

12 years ago | 8 downloads |

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Gabor function masks
Create Gabor-function convolution masks

13 years ago | 1 download |