Have you ever heard that while taking a photo, the perspective of the walls get incorrect.
We call it "tumbling walls (I don't know the correct english term for this? and I mean that:
[attachmentid=3177]

The left side is the origin the right one is after I corrected it. Do you can see the differenz?

Sorry if such a thread already excists. I looked for it but doesn't find it.

H-m-m-m, is it something to do with perspective?
Paulette

Martina - hmmmmm I've never heard of such a thing. What causes it and how did you fix that picture?

Left Picture: Wall of the closest building slants inwards on the farthest left.

Right Picture: The corners slant outwards.

I have never heard f it either .. but interesting

I found this interesting too and heard of it in a book for watercolor paintings. (totally realistic paintings - the only way I like watercolor)

And in a German forum.
And I wondered myself it is important. I downloaded (is THIS the right phrase????? Or more german slang of english?) a program to correct it, but the result is not what I expected.

I often have the feeling that photos of a building seems to be wrong - it must be this.

That is really weird. I am trying to understand what is causing this anomaly.

It looks like it has more to do with the lake of symmetry in the wood paneling. Just an optical illusion.

I think this effect comes from the lightrefraction. The lens of a camera is round not plain. The lightrefraction in the middle of the lens is different to the refraction in the margin.
You can use it quite extremly, when you have a "fisheye" for your camera.
This is one of the reasons that a good artist can see, if you draw from a photo or from alive.

Sorry, that was not easy for me, but i hope you can understand it.

Uta

I have seen this effect before. However, it was due to the camera lens. If the lens is not high quality it can cause the subject being photographed to appear warped. Usually it is most apparent near the sides or edges of the photo.

Chris

I quote Sunset and Chris. I know this visual error comes from the shape of the camera lens.

Martina, you chose a pic of a typical northern Europe house, completely built with wood. These houses are well known for bending and twisting year after year on their own.

Anyway you would see the same distorsion effect on the photo of every building accordingly witn the quality/shape of the lens.

I think that drawing from a pic wouldn't take us to correct this kind of detail. On the opposite side, drawing from life you no need to correct anything since our eyes/brain do the trick.

That's what I know, but I have few certainties in my life so I expect to be corrected. Yes, just like a lens distorsion.

First - to avoid this illusion you have to use a special lens with a filter - in very expensive cameras is such a filter, I think.

Sunset,


That's it. Thta's the reason why draing plein-air is much better. But I hate it! I already feel disturbed if my husband peeks over my shoulder....
And your englisch is good! *lol* Better than mine!

And theeeheeheeen:

Paolo - you are fresh! *laughing*
Those houses can live for more than 400 years. But if I would be honest I wouldn't live in it. *lol
The photo is not my house, it is a photo from pixelquelle.de .

In some of those houses, there are very good restaurant. I agree to Martina that's not a good place to live.

@ Traumsonne
I think both methods have their places in art. When you draw a portrait you need a camera otherwise a person has to sit in front of you for hours (pour person )

Ooh, the lens distortion makes a lot of sense.

http://www.mir.com.my/rb/photography/glossary/terms_d.htm

Go down to 'distortion'. Different lenses creat different distortions. I think in the pictures posted the distortion stands out because the lines of the beams make it more obvious than say if it were a brick building.