converted BW image reading in MATLAB

HI
When I convert a .pdf file to a monochrome(bw) .bmp image and read the
image using MATLAB imread function it is giving me the negated image.

Am I wrong somwhere.

this is the command I used to convert

E:\Chalamala\convert -density 300x300 original_conf.
pdf -quality 100 -monochrome -type bilevel  original_conf%d.bmp

Chalamala Srinivasa Rao

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