STEP BYSTEP ENHANCING DIGITAL PHOTOGRAPHS
Using Photoshop, an image can be edited to highlight various aspects, from the tones and shadows of buildings to the background that frames them. A quick and effective way of enhancing a digital photograph of an urban space is to make it monochromatic and add just one color—in this example, the buildings are monochromatic against a blue sky.
Open the picture in Photoshop.
Change the saturation of the picture to make it monochromatic.
Then play with the brightness and contrast to get a stronger image. ...