I have extracted R, G, B of jpeg image now I want to convert each one to matrix

[alexderjuengere]

 http://www.tannerhelland.com/3643/grayscale-image-algorithm-vb6/

Method 2 – Correcting for the human eye (sometimes called “luma” or “luminance,” though such terminology isn’t really accurate)

Grayscale generated using a formula similar to (Red * 0.3 + Green * 0.59 + Blue * 0.11)

you have to calculate this for each pixel!

[sara14]

No, maitaining pixel intensity is not required for case 1

If I add G&B, it is simply like summation of 2matrix, and the value of "pixel a" in G will be added to pixel a" in B.

I tried to wire the outlet of "+" to IMAQ array to image but it does't work this way I have to use something to convert it to format that is acceptable by this vi inlet

many thanks

[sara14]

Hi

Thanks for your reply,

No I can't use this formula. 1. I should just remove R, Convert  G & B to array, and add (combine) them using math functions, then convert it to an image then grayscale

2. for second case I should convert R, G &B to array, and add (combine) them using math functions, then convert this to an image then grayscale

Regards

[sara14]

VItan,

value is different from intensity? I thought value of each pixel means its intensity smileyembarrassed:

[sara14]

Have u recieved my reply?

[sara14]

Hi VItan

I realized what is my mistake im previous code. I cant use IMAQ color Image to array, bcoz I have my G&B are in grayscale, so I used IMAQ Image to array, and added them to create the new matrix, now I am going to convert this to an image using IMAQ arrat to image

Thanks for your help

[VItan]

---

@sara14 wrote:

VItan,

value is different from intensity? I thought value of each pixel means its intensity 

---

I'm sorry, I just realized that I had been making a great, and probably incorrect, assumption this whole time.  I was thinking of "intensity" of the original image's pixels as a single value per pixel, something like HSV value, HSL luminosity, or a straight RGB average.  Not even a well-defined assumption!  I'm now not sure at all what you meant regarding maintaining intensity:

---

I have to convert my image to Grayscalein such a way that the value of intensity of each pixel doesn't change 

---

However, everything you have said since seems to indicate that you are not concerned with the original image and simply want a G+B summation image and a R+G+B summation image.  In that case, it sounds like you have what you need, although I do not know how you plan to map the summed values to grayscale: As I mentioned earlier, the summing of planes' values can go over the U8 representation limit, so you will need to either limit the sum to 255 or sum them into a larger representation and then convert that as something other than a U8 grayscale...

[sara14]

Hi VItan

Thank you very much for your kind reply. it is fine, I am new in this field so I make many mistakes. By intensity I mean the value of voltage that has been recorded by the CCD camera for each pixel.

Yes, I have grabbed and saved several images using my camera. Sor to run this new program I use them. As you can see here, every time that I hit run, since the first step is open file, it askes me for the file, so I select the file and it runs.

Now, I have problem with the combination of R+G+B, it dosent show this image.

my input image is RGB(U32), then I have extracted R, G, B and have displayed them all as Grayscale (U8), ...I am not very good at this I cant find my mistake. every thing is fine only R+G+B image is not displayed in FP vindow

May plz have a look

[sara14]

If you dont mind, may I send my file to you in private window?  Bcoz I dont know how to remove it later on.  I am new in this froum, still not familiar with stuffs here