Rank: 93 based on 617 downloads (last 30 days) and 9 files submitted
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Jeff Mather

E-mail
Company/University
The MathWorks, Inc.
Lat/Long
37.890998840332, -110.370498657227

Personal Profile:

I am a software engineer in the Image and Scientific Data Formats team of The MathWorks' Image Processing Group.

Professional Interests:
File Formats, Digital Imaging, Color Science

 

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Files Posted by Jeff View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
11 Jun 2013 Screenshot DICOM Example Files Example DICOM files containing MR images of the brain. Author: Jeff Mather medical, dicom, dicominfo, dicomread, mr, brain 291 15
  • 4.3125
4.3 | 16 ratings
03 Feb 2012 NRRD Format File Reader Read imagery and metadata from .nrrd medical imaging format files. Author: Jeff Mather file io, image processing, medical imaging, nrrd, volume, voxel 40 1
  • 4.5
4.5 | 2 ratings
08 Nov 2010 Adobe Photoshop PSD file reader Functions to read images and get metadata from Adobe Photoshop PSD files. Author: Jeff Mather graphics import, graphics export, photoshop, psd, images, metadata 20 12
  • 4.16667
4.2 | 24 ratings
08 Nov 2010 Screenshot Color Image Histogram Display a histogram showing the color balance of an image. Author: Jeff Mather color, rgbhist imhist color ..., invalid handle object, error in rgbhist at 2..., seth, marker 121 35
  • 2.9
2.9 | 31 ratings
08 Nov 2010 Screenshot hexdump - A binary file explorer A GUI for file exploration: examine byte addresses, hex/char values. Author: Jeff Mather data import, data export, file, contents, hexadecimal, utilities 22 0
Comments and Ratings by Jeff
Updated File Comments Rating
05 Jun 2013 Daylight Savings Time Checks if a date is during USA daylight savings time Author: Nate

Pretty much does exactly what you would want it to do.

Comments and Ratings on Jeff's Files View all
Updated File Comment by Comments Rating
26 May 2014 Color Image Histogram Display a histogram showing the color balance of an image. Author: Jeff Mather Samad, Saleha

i want to extract the value that is maximum for a color pixel of an object , how can i get that ???

28 Mar 2014 Spectral and XYZ Color Functions Label plots with spectra. Convert wavelengths to RGB. Functions for color matching and illuminants. Author: Jeff Mather Liviu

I'm surprised that you don't obtain a unique RGB value for a given wavelength, as your RGB functions are truncated, saturated at 1. For example, in the range 512-548 nm you have the same RGB value: a pure green 0-1-0. Also in the range 611-641 you give constant pure red 1-0-0. I guess the eye should perceive a difference along those ranges, so the results are not realistic. Correct?

05 Mar 2014 DICOM Example Files Example DICOM files containing MR images of the brain. Author: Jeff Mather BADSHAH, GRAN

Hi all!

Hope u r fine, pls can any one help me how to watermark lsb of mri images? It is true for Ultrasound images can do tamper detection and recovery of size such as 480x640 but giving error 512x512x3 i think the error is due to x3 but how to fix this error?
Regards.

04 Sep 2013 Spectral and XYZ Color Functions Label plots with spectra. Convert wavelengths to RGB. Functions for color matching and illuminants. Author: Jeff Mather Zaman, Tim

30 Jul 2013 Color Image Histogram Display a histogram showing the color balance of an image. Author: Jeff Mather Yong

I test that h(1) = stem(1:256, rHist); hold on
h(2) = stem(1:256 , gHist);
h(3) = stem(1:256 , bHist);
hold off can achieve the same result. so it need not to use h(2) = stem(1:256 + 1/3, gHist,'g');
h(3) = stem(1:256 + 2/3, bHist),'b';
and we can use this command result = (1:256)==(1:256 + 1/3) to test, and it is just the same

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