c# - Stride and Width in image processing -

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I have a 1 bpp image that needs to be read.

I came to the following argument. But I'm not sure what he's trying to do. 

  int value = (imagebmd.Width + 15)> & Gt; 3; Byte * line = (byte *) imagebmd.Scan0; I do not know which values ​​are stored in column and row variables.   
 
 
  integer column = (imagebmd.Width + 7) & gt; & Gt; 3;  
 
 This is the  byte  length of the image line, it is equal to rounding up 
 
  columns = ceil (bitwidth / 8)  / Code> 
 
 The line image data is pointer to the starting address.

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