Comments on: All about pixel colors: Summary http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/ Steve Eddins manages the Image & Geospatial development team at <a href="http://www.mathworks.com/">The MathWorks</a> and coauthored <a href="http://www.mathworks.com/support/books/book5291.html?category=-1&language=-1">Digital Image Processing Using MATLAB</a>. He writes here about image processing concepts, algorithm implementations, and MATLAB.<br><br><img> Mon, 23 Nov 2009 01:23:00 +0000 http://wordpress.org/?v=2.3.1 By: Steve http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-22198 Steve Wed, 07 Oct 2009 18:27:52 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-22198 Yasotha—What do you mean by unique color identification? Yasotha—What do you mean by unique color identification?

]]> By: yasotha.l http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-22197 yasotha.l Wed, 07 Oct 2009 18:25:59 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-22197 hi i'm a student and i would like to know about unique color identication in any image and the place of the pixel position. hi
i’m a student and i would like to know about unique color identication in any image and the place of the pixel position.

]]> By: Steve http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-14956 Steve Tue, 13 Nov 2007 14:53:02 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-14956 Abhijit—I'm not sure that your question makes sense. Except for laser light, the light arriving at any particular sensor has a full spectrum of wavelengths, not just one. That spectrum is filtered according to the characteristic color of the sensor (e.g., red, green, or blue), and a single number recorded. Then the numbers for several neighboring single-color sensors (red, green, and blue) are combined in some way to produce a single RGB pixel. Abhijit—I’m not sure that your question makes sense. Except for laser light, the light arriving at any particular sensor has a full spectrum of wavelengths, not just one. That spectrum is filtered according to the characteristic color of the sensor (e.g., red, green, or blue), and a single number recorded. Then the numbers for several neighboring single-color sensors (red, green, and blue) are combined in some way to produce a single RGB pixel.

]]> By: Abhijit http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-14928 Abhijit Tue, 13 Nov 2007 06:21:45 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-14928 Hi Steve, After capturing the color image on the color CCD camera, I would like to find out at each pixel the wavelength. Can you please help me regarding the procedure I should follow in order to determine the wavelength at each pixel. Please help. Thanks a lot. Abhijit Hi Steve,

After capturing the color image on the color CCD camera, I would like to find out at each pixel the wavelength. Can you please help me regarding the procedure I should follow in order to determine the wavelength at each pixel.

Please help. Thanks a lot.

Abhijit

]]> By: Steve http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6959 Steve Tue, 14 Aug 2007 13:35:38 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6959 Yicong—There are examples showing how to use the code in Chapter 8 of the book. What other information are you looking for? Yicong—There are examples showing how to use the code in Chapter 8 of the book. What other information are you looking for?

]]> By: Yicong http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6947 Yicong Fri, 10 Aug 2007 18:33:57 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6947 Steve, I am working image scrambling in JPEG domain. I am looking the matlab code for JPEG encoding and decoding which can display the compressed result(JPEG image). but I didn't get it. the matlab code about JPEG compression in your book is only for the algorithm implementation, but how can I display the result of your code? Please help. Thanks a lot. Yicong Steve,

I am working image scrambling in JPEG domain. I am looking the matlab code for JPEG encoding and decoding which can display the compressed result(JPEG image). but I didn’t get it. the matlab code about JPEG compression in your book is only for the algorithm implementation, but how can I display the result of your code?

Please help.

Thanks a lot.
Yicong

]]> By: Dave T http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6890 Dave T Tue, 17 Jul 2007 20:19:20 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6890 khairiah, The Image Acquisition Toolbox does not currently support still image cameras, so you will not be able to interface to your camera using Image Acquisition Toolbox. You will have to write code to interface to your camera. The easiest way to do this would be to find an ActiveX control that can communicate with still image cameras and use MATLAB's ActiveX interface. khairiah,

The Image Acquisition Toolbox does not currently support still image cameras, so you will not be able to interface to your camera using Image Acquisition Toolbox.

You will have to write code to interface to your camera. The easiest way to do this would be to find an ActiveX control that can communicate with still image cameras and use MATLAB’s ActiveX interface.

]]> By: B NARSIMHACHARY http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6851 B NARSIMHACHARY Tue, 10 Jul 2007 09:39:29 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6851 I Want to know the National and International Experts in Image Processing I Want to know the National and International Experts in Image Processing

]]> By: khairiah http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6850 khairiah Tue, 10 Jul 2007 02:49:16 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6850 steve, how if my camera is not scientific camera and also not firewire type camera but more to commercial type digital camera.Ex Digital Still camera Sony DSC -F717. It is I must have certain driver in order to use imaq. steve,
how if my camera is not scientific camera and also not firewire type camera but more to commercial type
digital camera.Ex Digital Still camera Sony DSC -F717.
It is I must have certain driver in order to use imaq.

]]> By: Steve http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6846 Steve Mon, 09 Jul 2007 13:26:08 +0000 http://blogs.mathworks.com/steve/2006/04/07/all-about-pixel-colors-wrapping-up/#comment-6846 Hussain—I'm sorry, but I can't help you with debugging your program. Also, a blog comment isn't the best place for posting a lot of code, so I'm going to delete that part. Hussain—I’m sorry, but I can’t help you with debugging your program. Also, a blog comment isn’t the best place for posting a lot of code, so I’m going to delete that part.

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