when using Phil Sallee JPEG toolbox to extract the DCT coefficients are these the quantized DCT coeefcients or they are only DCT coeffcients??

please help I am confused

when I write this code

 im=jpeg_read('Original.jpg');
Lum=im.coef_arrays{im.comp_info(1).component_id};

here am I extracting only the DCT coefficients of luma, or I am extracting the quantized DCT coefficients?? how can I extract the quantized DCT coefficients ??