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# need help creating a 2D matrix of an image

Asked by Rao on 30 Jul 2012

i have an ycbcr image and i want to get the cb cr planes in a single 2d matrix .

```Y=ycbcr(:,:,1);
Cb=ycbcr(:,:,2);
Cr=ycbcr(:,:,3);
```

by this im getting three 1d matrices but i want to get the color information i.e cbcr planes in a single 2d matrix.

## 1 Comment

Walter Roberson on 30 Jul 2012

Please show us the output of

```size(ycbcr)
```

## Products

Answer by Image Analyst on 30 Jul 2012

That doesn't make sense to me. You have everything you need. For a given pixel at a given (row, column) you have all three component's values. What is this other thing you're trying to derive, why do you want it, and why would it be more useful than the 3D color image?

## 1 Comment

Yash on 30 Jul 2012

its 3 D info

Answer by gargoyle on 2 Aug 2012

now im not sure, but i think this is what you want:

```Y=zeros(size(ycbcr(:,:,1))); %
```
```Y=ycbcr(:,:,1);
```
```Cb=zeros(size(ycbcr(:,:,2)));
```
```Cb=ycbcr(:,:,2);
```
```Cr=zeros(size(ycbcr(:,:,3)));
```
```Cr=ycbcr(:,:,3);
```

i've made 3 different empty mattrix assignments just to be explicit all the 3rd dimensions should have the same row,col size.

Answer by faraz.a on 25 May 2013

I want to find matrix of 0's and 1's (for white and black pixels) for a given binary image

## 1 Comment

Image Analyst on 25 May 2013