Rank: 263 based on 473 downloads (last 30 days) and 3 files submitted

Douglas Lanman

E-mail: dlanman@brown.edu
Company/University: Brown University

Personal Profile:

Currently, I am pursuing a Ph.D. in Electrical Engineering at Brown University. Before beginning my graduate studies, I worked at MIT Lincoln Laboratory, Los Alamos National Laboratory, and Intel. I hold a Bachelor's Degree in Applied Physics from Caltech ('02).

Through my research at Brown I hope to develop advanced methods for computer vision, graphics, and machine learning. Current research topics include computational photography, 3D reconstruction, catadioptric systems, and visual sensor networks.

Homepage:
http://mesh.brown.edu/dlanman

Professional Interests:

Watch this Author's files

Files

Files Posted by Douglas				View all 1 - 3 of 3
Updated	File	Tags	Downloads (last 30 days)	Comments	Rating
06 Sep 2006	Bilateral Filtering Implements bilateral filtering for grayscale and color images. Author: Douglas Lanman	cartoon filter, filtering, bilateral filter, image abstraction	179	10	4.6 4.6 \| 15 ratings
18 Jan 2006	Steerable Gaussian Filters Evaluates the directional derivative of an image along an arbitrary axis. Author: Douglas Lanman	image gradient, steerable filters, orientable, filtering, directional derivativ...	79	6	4.33333 4.3 \| 3 ratings
13 Jan 2006	Sound Level Meter Implements real-time spectrum analyzer and displays decibel level. Author: Douglas Lanman	sound level meter, decibel meter, fft, spectral analysis, spectrum analyzer	215	9	4.0 4.0 \| 6 ratings

Comments and Ratings on Douglas' Files			View all 1 - 5 of 32
Updated	File	Comment by	Comments	Rating
25 Mar 2009	Sound Level Meter Implements real-time spectrum analyzer and displays decibel level. Author: Douglas Lanman	Brian	Cheers, great help as tutorial on real-time data aqusuisition
08 Feb 2009	Bilateral Filtering Implements bilateral filtering for grayscale and color images. Author: Douglas Lanman	Kesavan, Arun	First of all, thank you for the code but, while using with mat lab 7.0 , i am getting errors as ??? Error: File: Z:\Bilateral Filtering\bfilter2.m Line: 29 Column: 1 Function definitions are not permitted at the prompt or in scripts. Error in ==> runDemo at 30 bflt_img1 = bfilter2(img1,w,sigma); please tell me how to use your code?
03 Feb 2009	Steerable Gaussian Filters Evaluates the directional derivative of an image along an arbitrary axis. Author: Douglas Lanman	Floros, Georgios	I have also noticed the error in the first derivative of the Gaussian at line 108. For your second question, I think that a Gaussian smoothing helps as a preprocessing step to remove noise.
17 Dec 2008	Bilateral Filtering Implements bilateral filtering for grayscale and color images. Author: Douglas Lanman	Jamleh, Hani
28 Oct 2008	Sound Level Meter Implements real-time spectrum analyzer and displays decibel level. Author: Douglas Lanman	ahamed, sameer	It is a nice model of Sound Level Meter. My observation is: In the code, A-weighting is performed in frequency domain (i.e. multiplication in frequency domain). I feel like, if the A-weighting is in time domain (filtering, of input signal which is sampled at variable sampling frequency), the computation of fft can be saved.

Top Tags Applied by Douglas	1 - 5 of 13
filtering, bilateral filter, cartoon filter, decibel meter, directional derivative

Files Tagged by Douglas				View all 1 - 3 of 3
Updated	File	Tags	Downloads (last 30 days)	Comments	Rating
06 Sep 2006	Bilateral Filtering Implements bilateral filtering for grayscale and color images. Author: Douglas Lanman	cartoon filter, filtering, bilateral filter, image abstraction	179	10	4.6 4.6 \| 15 ratings
18 Jan 2006	Steerable Gaussian Filters Evaluates the directional derivative of an image along an arbitrary axis. Author: Douglas Lanman	image gradient, steerable filters, orientable, filtering, directional derivativ...	79	6	4.33333 4.3 \| 3 ratings
13 Jan 2006	Sound Level Meter Implements real-time spectrum analyzer and displays decibel level. Author: Douglas Lanman	sound level meter, decibel meter, fft, spectral analysis, spectrum analyzer	215	9	4.0 4.0 \| 6 ratings

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