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Tristan Ursell


University of Oregon

Last seen: 1 year ago Active since 2012

Professional Interests: physics, biophysics, genetic algorithms, image processing, stochastic simulations

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  • Personal Best Downloads Level 3
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  • 5-Star Galaxy Level 5
  • First Submission

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Submitted


Frechet Distance Calculator
Estimate the similarity between curves in space using the scalar Frechet Distance.

4 years ago | 6 downloads |

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imread_big -- read in TIFF stacks larger than 4GB
Load any size TIFF stack, even those larger than 4GB.

5 years ago | 8 downloads |

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imageautocorr -- Autocorrelation of time-ordered data
Performs autocorrelation of time-ordered data or images, to output an autocorrelation matrix with values ranging from -1 to 1.

5 years ago | 3 downloads |

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autocorr2d
Compute the 2D spatial autocorrelation of a matrix or image using the Wiener - Khintchine Theorem.

6 years ago | 19 downloads |

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encoder.m decoder.m
Simple and instructive implementation of symmetric-key encryption and decryption.

7 years ago | 3 downloads |

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bandbank -- isotropic image spectral decomposition and filtering
Decompose images into spatially isotropic spectral component images.

7 years ago | 1 download |

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relnoise(Iin,sz,sigma,varargin)
Reduce image noise by measuring local pixel statistics and remapping intensities.

7 years ago | 1 download |

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Generate Random Numbers from a 2D Discrete Distribution
Random numbers from any 2D discrete probability distribution, at any resolution.

8 years ago | 7 downloads |

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streamfun
A fast(er) and low overhead alternative to the stream2 function.

8 years ago | 2 downloads |

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Active Figure Zoom for Selecting Points
Select points at a user-specified zoom level that moves around the image as you click.

10 years ago | 2 downloads |

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Adaptive Colormap Function Creates a Colormap Specific to Data
Easily design and fit a colormap to the values in your data!

10 years ago | 1 download |

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Connect Randomly Ordered 2D Points into a Minimal Nearest-Neighbor Closed Contour
Connects randomly ordered 2D points into a minimal nearest neighbor contour.

10 years ago | 2 downloads |

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1D Non-derivative Peak Finder
Up-sample and filter noisy data to find peaks without using derivatives.

10 years ago | 3 downloads |

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Find Image Extrema
Find local maxima, local minima, saddle points, and flat regions in an image.

11 years ago | 2 downloads |

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Connected Component Analysis on an Undirected Graph
Connected component analysis on undirected graphs, with thresholding and connectivity constraints.

11 years ago | 1 download |

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Create a Simulated Image of Diffraction Limited Spots with Noise
Create images with diffraction-limited spots of varying size and intensity, with noise.

12 years ago | 3 downloads |

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Copy Files in Batches using Search Terms
Copy files matching search terms, from sub-directories matching search terms into a new directory.

12 years ago | 1 download |

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File Name Search Function
Generate a list of file names that meet a set of text search criteria.

12 years ago | 1 download |

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Random Numbers from a Discrete Distribution
Simple algorithm to generate random numbers from a user-defined discrete probability distribution.

12 years ago | 6 downloads |

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Fire and/or Custom Colormap Function
Use the 'fire' colormap in Matlab, or create your own.

12 years ago | 17 downloads |

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2D Distance Transform of Arbitrary Points
Distance transform from arbitrary points at a user set resolution and range.

12 years ago | 1 download |

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Matrix Convolution with Sub-Pixel Resolution
Convolve two matrices at sub-pixel resolution, using bilinear interpolation.

12 years ago | 1 download |

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image_save
You know that annoying error when trying to write to an image stack in Matlab?

12 years ago | 1 download |