Using Adjustment layers to enhance an image

Image before

image after

Download the image and open in photoshop

Next change its Mode to CMYK by going to menubar/image/mode

 

With the image selected open up your channels palette

menubar/window/channels and select the black channel
Then go to menubar/select/color range
Select highlights from the dropdown menu and check the box invert and select selection as per the picture. Do this for Midtones and shadows

save the selection each time from the select menu

Fig 6 Your channels palette should end up looking like Fig6

next go to the layers palette and click on add adjustment layer. Choose Hue and saturation

copy your highlights selection from the channels palette and paste them into the adjustment layers mask

Repeat the process for Midtones and shadows as per fig8

then adjust the hue and saturation for the three adjustment layers to get desired results

fig8