I was not happy with the final result of this image, so as I am usually doing in last weeks, I have re-processed it again. The picture had artifacts due to an usual problem with tonemapping software is the objects in motion. In particular, the water streams like waves on the sea or fountains.
Photomatix or other HDR programs don’t correct efficiently the ‘ghost effect’ produced by the water motion, so the best way to correct this is to manually blend in Photoshop the tonemapped image with one o several exposures. Although I don’t explain this in the photo-feet because I do in a shorthand. I usually do this, also knows as Digital Blending or DRI (Dynamic Range Increase) in my current workflow ,for so many pictures, to get a more natural look on them.
The manual blending is done, working with different layer masks for each of the exposures and the initial tonemapped image. I really love to do this. It is like painting. I was afraid when I was a beginner but now, I enjoy. You can try it. Just put your tonemapped image in a layer and one of the exposures in another one. Create a layer mask and select a soft black pencil with some opacity ( that depends in the image) to make transparent the above layer. They are combined to get the final image before removing noise and sharpening the picture.
In this case, I used the 0EV exposure to correct the ghosting in sky cloud and fountain water and the -2EV exposure to get more details in the water flow.
Plaza de España, Madrid (Spain)
Canon EOS 450D | Sigma 10-20mm f4-5.6 DC EX HSM @ 10 mm | f11, 2.5s, ISO 100. HDR /DRI from 3 exposures @ [-2 EV..0..+2 EV]