I didn't know where to post it, so I just posted it here.

Well, what I want is a program to rotate an image I have. However, when I do it in Photoshop, the some of the lines are getting really pixelated and the quality of the image and details are gone. So, I wonder if there are any programs that can rotate the image 45 degrees without losing the picture quality.

Also, I've made a picture showing what I mean.

Before rotating 45 degrees:


After rotating:


As you may see, the lines on the second image are completely messed up.
But is there a program, or just a good way to rotate an image without losing the quality?

I think in Photoshop CS2 you can create Smart objects of layers, and then you can freely transform them into different shapes / positions, but I'm not very sure about that, since it might only work with resizing...

well after looking at your question I am wondering that is there any image editing software which can be better than Photoshop?
I dont think so, I personally use THE GIMP and I am quite happy with the results. I use THE GIMP becasue it is free and I dont have enough money to purchase PHOTOSHOP!

I believe your issue is caused by not having the same dimension when you rotate. For example, the diagonal length is always greater than the side length. When you rotate the image to 45 degrees, the diagonal length is shrunken to the length of the side. A simple geometry flaw.

This is what I would do. Copy that image and paste it to the much larger image layer. So if your image is 40x40, copy it and click on new, make the new file's dimension to 60x60 then paste. See if that solves your image degradation.

I'm moving this to Software from Computers section.

well i have tryed phtoshop cs2 tons of times and when i rotate stuff it nevers does that are u sure ur not using the latest version of it

Humm that's funny. I tried my theory but I too had the same 'broken line' effect. So I tried this without copying and pasting to a new file layer:

Image rotate arbitrary 45 degrees clock wise (CW) --> rotate 90 degrees counter clock wise (CCW)

And this is what I got


It seems like when you just do 45 degrees CCW I get the same effect. I have no idea why... that's puzzling. I wonder if the compression is showing moiré cause?

Use Corel Draw if you have it. Just enter 45° in rotation box and hit enter. Save your image as jpg. That should do it. If you dont have Corel Draw, find some similar program (for vector graphics) and try it.

I personally use Gimp and if i remember well i suffered with 45 degrees rotations. But i think it suffers the same way as Photoshop does. If you find an elegant solution please post it here.

i believe the problem is that your rotating a picture which is probably 72 dpi. If you rotate one that's at 150 or 300 or even higher the quality is much better. shame though because that also means that you would have to create your images at a much hight dpi.round.