Combine/Concatenate Pixels of two Image buffers to form a single image

Hi All,
I am concatenating TIFF images image1 and image2 of CMYK pixel format with same height. For that I am copying the pixels to Buffer1 and Buffer2 then combining the both buffers to BUFF.

Code:

      //Image1 Dimensions 
      UINT Width = 150;
      UINT Height = 100;

     UINT Stride = Width  * 3 ;

     Stride = ((cbStride + sizeof(DWORD) - 1) / sizeof(DWORD)) * sizeof(DWORD);
      
      BYTES * Buffer1 = NULL;
      BYTES * Buffer1 = new BYTE[Stride * Height];

      //Here the pixels are copied to Buffer using GDI+ as follows
      //WICRect rc = { 0, 0, Width, Height };
      //piFormatConverter->CopyPixels(&rc, Stride, Stride * Height, Buffer1);


      //Image2 Dimensions 
      UINT Width2 = 150;
      UINT Height2 = 100;

     UINT Stride2 = Width2  * 3 ;

     Stride = ((Stride2 + sizeof(DWORD) - 1) / sizeof(DWORD)) * sizeof(DWORD);
      
      BYTES * Buffer2 = NULL;
      BYTES * Buffer2 = new BYTE[Stride2 * Height2];

      //Here the pixels are copied to Buffer using GDI+ as follows
      //WICRect rc = { 0, 0, Width2, Height2 };
      //piFormatConverter->CopyPixels(&rc, Stride2, Stride2 * Height2, Buffer2);

     // ...  Now I want to Combine the Pixels of Buffer1 + Buffer2  so that to create a single image using the same GDI+ method as follows.

     BYTE * BUFF=NULL;
     UINT BUFFSize = (Stride + Stride2) * Height;
     BUFF = new BYTE[BUFFSize];
     memcpy(BUFF,pbBuffer,(cbStride * uHeight));
     GdiPlusBitmap = new Bitmap(Width+Width2, Height, (Stride+Stride2),   PixelFormat32bppCMYK, BUFF);

But here the combined memory through created image is black & white and not sharp.

I hope some experts here can guide me with some work arounds.

Thanks & Regards,

Madhav

Imagine each image was only 1 pixel wide.

RGBX and rgbx
where X and x represent the padding at the end of each row to make up the multiple of 4 stride.

Are you outputting this
RGBrgb

Or do you have some Xx mixed in with it.

This Pixels actually CMYK

Therefore CMYKX and cmykx with padding

I am trying to add CMYKX + cmykx

we need to remove the X before adding?
then how can we do please..

> we need to remove the X before adding?
What do you think, based on your knowledge of the format and the results of your experiments to date?

> then how can we do please..
Copy a row from one image, without the xxxxx
Append the same row from the other image, without the xxxxx
Repeat for the win!

Thank you Salem for your kind advice. Actually Tiff image pixels which I am decoding are encoded in LZW compression. Therefore to read and encode it back need some extra effort.

Thanks & Regards