Thanks all for the comments.
Binnur/Sergio - No HDR here Binnur. The technique is relatively simple and is one I favour for architecture. It is similar to HDR in one respect in that you can choose to what extent you apply it. It uses a high contrast mono overlay to harden the edges of the detail in an image and carefully applied, it can be used with colour as well as mono. Applying it lightly just emphasised the detail in the original image which is why it works well for architecture IMHO, particularly mono architectural shots. Using it more aggressively produces a correspondingly more graphic effect. What follows is centred on Photoshop but it should translate to other programmes using the appropriate tools. All you do is:
1. Duplicate the image onto a second layer. If you have the Layers dialogue box visible on the RHS of the screen, you just need to right click on the background layer and select "Duplicate Layer".
2. Select the new layer and go to Filter/Stylise/Find Edges to produce more of a line drawing.
3. Convert the line drawing to mono then select the curves tool (Image/Adjustments/Curves) and substantially increase the contrast by creating an "S" curve. You should now have a fairly graphic drawing like image on the new layer.
4. Note:
4.1 The degree to which you do this is a matter of trial and error plus personal taste.
4.2 Depending on the nature of the base image, you may find that inverting the mono layer is a better option.
5. Next select "Soft Light" as the blending Mode.
6. Finally, adjust the opacity of the mono (top) layer to taste.
In the case of the above images of course, the base layer was converted to mono before applying the PP described above. There was also some subsequent further PP once the two layers had been flattened. The need for and degree to which this might be desirable, will depend on the nature of the image that you select in the first instance and so I won't describe here (even if I could remember what I did
![Embarrassment](https://cdn.cambridgeincolour.com/forums/images/smilies2/redface.png)
).
Have a play.