Problem with flare/ghosting

<p>I took a photo of the dome of an old Mughal period mosque recently. This mosque is a beautiful example of Mughal architecture, and this dome is quite amazing for the intricate inscriptions and lacquer work on it. Unfortunately, I was using the Nikon 15mm 3.5 lens, which is notorious for its tendency towards flare and ghosting and, unnoticed by me at the time, there was a small window on one side of the dome letting in bright sunlight. This has resulted in a very unsightly blue blob on the opposite side from the window. The rest of the photo is reasonably well exposed. I would be very grateful if somebody on the forum could guide me as to how I could get rid of this problem. I am reasonably familiar with Photoshop, although by no means an expert. Tried to clone the blob out but that didn't work too well because of the inscriptions in the area.<br>

Thanks in advance<br>

Javed</p>

<p>Where's the photo?</p>

<p>If it's not too big an area, you could try selecting it and using a levels adjustment layer -- perhaps playing around with the individual RGB channels and try to blend the color in with the background.</p>

<p>To the same effect, using the Match Color Adjustment might get you somewhere.</p>

<p>Using the Clone Tool with the blending mode set to <em>color</em> might blend in the discolored area also.</p>

<p>If you just can't seem to get a good result, post the pic or a link to it and other people can try a few things. If something works well, they can share how they did it!</p>

<p>Sorry, I should have posted the photo in the first place. Here it is now. The blue blob is at the bottom.<br>

Would be most grateful for pointers on how to correct this.</p><div></div>

<p>The red channel is better than the blue channel for the blob. I don't know how to do this but there is a way to use the red channel data for that area to minimize the problem.</p>

<p>Would be grateful if someone could show me how to use the red channel to correct the problem. My PS skills are too limited for me to figure it out myself.<br>

Thanks</p>

<p>Check out this old Russell Brown video on how to remove a stain in Photoshop:</p>

<p>http://www.cunninglingo.co.uk/photoshop/rbstains.pdf</p>

<p>Same principles apply to removing the blue blob. I'm sure there are more simple techniques by entering other search terms in a google search. I used "How to remove a stain Russell Brown". I remember this tut when I found it on the Photoshop 5 CD.</p>

<p>Just thought I'd put on the forum how I managed to solve the problem by another method. May come in useful for someone else.</p>

<ol>

<li>Make a rectangular marquee selection of the top half of the circular dome.</li>

<li>Copy this to another layer (Ctl-J). Select this new layer</li>

<li>Go into Free Transform (Ctl-T) and do a Flip Vertically</li>

<li>Use the Warp tool in Free Transform to align the pattern with the underlying layer. Helps if you keep the opacity of the layer at a level where you can see the underlying layer.</li>

</ol>

<p>The above method works because you have repeating patterns all round the circle. A copy of the corrected image is attached. It is mostly OK except for a slight misalignment of lines on the left side. This could also have been easily corrected, if I had noticed it at the time.<br>

Thanks to everyone for their help.<br>

Javed</p><div></div>