StudentFeM's profile - activity

Hi,

I've created an Mat Object and split it into three channels:

vector<mat> bgr_planes;
split(frame, bgr_planes);

The content in the Mat frame is:

frame = {Cr0, Y0, Cb0, Y1, Cr2, Y3, Cb2, Y4, Cr4, Y5, Cr4, ...}

How can I separate the Y, Cb and Cr component?

Is there a function?

Best regards, Michael

Hello,

I'd like to write a single videoline, which is stored on DDR-RAM, in a Mat Object.

I have initialized an int-Array and convert it to a Mat Object:

int *Video_Line = (int *) calloc(1920, sizeof(int));
Mat videoline = Mat(1, 1920, CV_8UC3, Video_Line); 

Now the write function:

for(int i=0; i <= 1920; i++)
{
    unsigned long val = getData((DPRAM_START+i));
    Video_Line[i] = val;
}

The output is:

Mat = {99, bc, 12, bc, 99, bc, ...}

That correspond to:

Mat = [Y0, Cr0, Y1, Cb1, Y2, Cr2, ...]

How can I explain MAT, that the data are in YUV 422?

That is important to calculate a histogram.

Best regards,

Michael

That works, thank you very much!

Hi,

I'd like to draw a waveform Diagram from cv:Mat.
So I use the line()-Function with Point(int x, int y) inside.

I try it with:

Code:

line(waveY,Point(bin_w * (i - 1),wave_h) ,Point(bin_w * (i), ycrcb_planes[0].row(i).col(0)), Scalar(128, 128, 128), 2, 8, 0);

The Problem is, that cv Point need int x and int y. So I have to convert every single "Pixel" from
Matrix into an int value.

I need something like that:

Code:

 int value = (int) ycrcb_planes[0].row(i).col(0)

Does anyone knows a solution for that?
I would be very happy :-)