Load Jpeg and convert to 8 bit grayscale array?

[MikeS81]

Hi muks,

what do you mean?

Mike

[muks]

Mike,
          Extracting the luminance plane for example from a jpeg image should convert it into a gray scale 8 bit image right?

[MikeS81]

Hi muks,

i don´t understand what you want to tell me. Can you explain please?

Mike

Message Edited by MikeS81 on 07-25-2008 08:22 AM

[muks]

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Hi Chris,

to convert a RGB value to a grayscale value use this formula: "gray = 0.299R+0.587G+0.114B". To detect your edge see something like "Sobel-Operator", "Prewitt-Operator", or .... .

Mike

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I was just  saying that extracting a  single plane from a n RGB image should convert it into  a gray scale image.

[Anfego]

Hello Mike, thank you very much for the quick response. I tried the code and it does not work for me. The truth is that my problem is other, but I thought it could be the solution.  
 
Although my problem is this: I've created a matrix of 640x480 floating point and I need it to show it in grey scale.  I found an example from NI where a palette of gray is created and used with Flatten Pixmap box, but this example use the function Join which is it not available in the 7.1 version, this is the one that I work with.  If anyone knows how to solve this problem, I'll really appreciate it. 
 
Best regards,

Anfego

[MikeS81]

Hi Anfego,
which example do you mean? Can you show it please?
Mike

[muks]

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my problem is this: I've created a matrix of 640x480 floating point and I need it to show it in grey scale.

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Did you try  array  to  image function ? can you post your  array?

[Anfego]

Hi, those are example what Im talking about.

[MikeS81]

Hi Anfego,

see the attached example please.

Hope it helps.

Mike

[Anfego]

Thank you so much, Mike, it is perfect.


Cheer!!! XD