Wikipedia:Valued picture candidates/Chicago City Hall Green Roof

Chicago City Hall Green Roof

Original - Chicago City Hall green roof from the Richard J. Daley Center

Edit sheared in GIMP and cropped in Paint by TonyTheTiger (talk · contribs)

Edit 3 Rotated and Cropped less showing the tops of the other building's roof's per Elekhh suggestion, no distortion.

Reason: This is a high EV image. In fact, I have been contacted for permission to include a derivative of it in a publication.
Articles this image appears in: Chicago City Hall
Green roof
Architecture
Urban heat island
Creator: TonyTheTiger

Support as nominator --TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 00:22, 15 July 2010 (UTC)[reply]
Support I find it is a very good illustration of green roof, used in several related important articles. Despite technical shortcomings, still the best urban green roof image on Wikipedia. --Elekhh (talk) 22:40, 18 July 2010 (UTC)[reply]
Conditional Support I'd like to see an alt with the roof more centered and straighted in the frame... it's angle is a little off-putting for me. — raeky T 14:36, 25 July 2010 (UTC)[reply]
- Comment on edits, I didn't want an edit that distorts it in any way, I uploaded an edit, I simply just rotated so the roof was straight and cropped. Support my edit 2. — raeky T 15:28, 25 July 2010 (UTC)[reply]
  - I am not seeing much difference between your edit and mine.--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 20:48, 25 July 2010 (UTC)[reply]
    - I created it and started posting it when you apparently was making another edit, the first version you uploaded did noticeably look distorted. — raeky T 21:25, 25 July 2010 (UTC)[reply]
      - I oversheared the first one making a 100 unit shift. I redid it with only an 85 unit shift in Gimp. This looked much better and probably as good as yours with more pixels of detail.--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 21:33, 25 July 2010 (UTC)[reply]
        Why use shear? I just rotated and cropped, so every pixel is perfectly in in proportion to the original, sheer changes things.. — raeky T 21:36, 25 July 2010 (UTC)[reply]
        Did you clone some grey area after rotating?--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 01:12, 26 July 2010 (UTC)[reply]
        No, just cropped. — raeky T 01:14, 26 July 2010 (UTC)[reply]
        I think the grey roofs on the other side of the road (visible in original and edit1) add EV by emphasisesing the pioneering (i.e. oasis in the desert) appearance of the city hall's green roof . --Elekhh (talk) 01:38, 26 July 2010 (UTC)[reply]

You could not have just rotated the image. It is physically impossible unless you cloned some grey. ~~This really looks like you just cropped and rescaled my final version.~~--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 08:06, 26 July 2010 (UTC)[reply]

Wait you clipped a little off the left. I am going to look more closely at this in the morning. I am trying to figure out what you did. I apologize. I might not be thinking clearly at this late hour.--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 08:15, 26 July 2010 (UTC)[reply]

The specific steps, in Photoshop, i drew a line with the ruler along the edge of the green roof building, I then did arbitrary rotation, which auto fills in the degree based on the rulers angle, this quickly and easily rotated it right, I then cropped it so there was no white on any corner... Theres a gazillion guides that tell you how on google. — raeky T 12:20, 26 July 2010 (UTC)[reply]

Since your algorithm seems to require more edge chopping, I am trying to see the distortion in my version that yours eliminated. Please help me.--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 14:02, 26 July 2010 (UTC)[reply]

My image overlaid over yours, with pink lines drawn over key prospective lines, the pink circle is where i used (setting mine to half transparent) to align the two images by (the weird architectural box thing on the top left of the building, stairwell probably).

Hiding the layer that was my image reveals that the lines don't match up right, there is distortion in your image throwing off the prospective.

Comparison of the two images with overlays.

What I did was I put my picture as a layer over yours in Photoshop, set transparency low on it so I could move it arround and align it. The area I thought I could best match the alignment was the area I circled in pink. I then drew pink lines over key prospective points on my picture then turned off the layer to see how those lines matched up on your image. They didn't match well at all, it looks as if there is distortion by the way you modified the image. If you want I can send you the .psd for this file so you can see for yourself. — raeky T 14:23, 26 July 2010 (UTC)[reply]

Yes the lines don't match up. A shear and a rotation will obviously cause different pixel adjustments. I am just saying that distortion is a strong word and that I don't like the extra bit clipped off the left to eliminate the lower left whitespace. In this case, the "distortion" is very minor and I am not sure worth arguing about, but if you think it is significant, you know more about photography than I.--TonyTheTiger (T/C/BIO/WP:CHICAGO/WP:FOUR) 15:21, 26 July 2010 (UTC)[reply]

Not promoted --Jujutacular ^talk 14:04, 4 August 2010 (UTC)[reply]