convert image

[Meenal-goyal]

I am running this command on the image:

 convert -verbose -density 150 -trim input.jpg -quality 100 -sharpen 0x1.0 output.jpg

But I wanted to execute same thing using ruby script, so i tried this:

im = Magick::Image.read(pdf_file_name)
im.each do | img |
im[0].density = "150"
im[0].trim!
im[0] = im[0].sharpen(0,1.0)
im[0].write("final.jpg") {self.quality = 100}
end

The problem is both are giving different outputs. Could you please tell where am i going wrong?