David Young

University of Sussex and University of Southampton

Last seen: 2 years ago | Active since 2009

Followers: 0 Following: 0

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Professional Interests: Image Processing

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RANK
77
of 297,503

REPUTATION
1,997

CONTRIBUTIONS
5 Questions
641 Answers

ANSWER ACCEPTANCE
60.0%

VOTES RECEIVED
444

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Submitted

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

9 years ago | 6 downloads |

4.75 / 5

Submitted

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

9 years ago | 15 downloads |

4.6 / 5

Submitted

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

9 years ago | 3 downloads |

4.0 / 5

Submitted

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

10 years ago | 2 downloads |

4.0 / 5

Submitted

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

10 years ago | 2 downloads |

4.33333 / 5

Submitted

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

10 years ago | 1 download |

4.8 / 5

Submitted

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

11 years ago | 1 download |

5.0 / 5

Submitted

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

11 years ago | 2 downloads |

5.0 / 5

Submitted

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

11 years ago | 7 downloads |

4.9 / 5

Submitted

emptyStruct
Creates empty struct arrays of various kinds

11 years ago | 2 downloads |

5.0 / 5

Submitted

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

11 years ago | 2 downloads |

0.0 / 5

Submitted

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

13 years ago | 2 downloads |

5.0 / 5

Submitted

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

13 years ago | 1 download |

0.0 / 5

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)).

13 years ago | 1 download |

0.0 / 5

Submitted

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

14 years ago | 4 downloads |

4.33333 / 5

Submitted

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

14 years ago | 8 downloads |

4.3 / 5

Submitted

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

15 years ago | 1 download |

0.0 / 5

Submitted

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

15 years ago | 3 downloads |

4.6 / 5

Submitted

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

15 years ago | 6 downloads |

4.8 / 5

Submitted

Gabor function masks
Create Gabor-function convolution masks

16 years ago | 1 download |

5.0 / 5