Jagged lines after resizing

With my 30D, when I'd resize things for posting I'd go with 876px wide which was exactly 25% of 3504px, the full size RAW image. Everything looked great, no jagged lines or anything.

I just went from a 30D to a 50D and now whenever I go to 25% of the full image size of the 50D, I get wierd jagged lines instead of straight ones.

I'm assuming the math/division of 25% vs something like 33% will keep the pixels squared up so to speak.

Is there anything I can do to keep this from happening or do I just have to deal with it?

Here's the same picture at 100% of the full res file 4752px wide and then 100% of an 1188px wide file (resized to 25%). There is a little jaggedness on the numbers but it seems much worse on the 25% image.

Ran into this the other day....

Original "resize" using "bicubic". The line between the hood and fender looks pretty bad...

The jaggedness looks better but I think you lost a little overall edge sharpness. I wonder if it would look a little sharper with an "unsharp mask" in Photoshop.

I give that bicubic thing a try on mine.

Jeff wrote in post #7376122
The jaggedness looks better but I think you lost a little overall edge sharpness. I wonder if it would look a little sharper with an "unsharp mask" in Photoshop.

I give that bicubic thing a try on mine.

yep... and when i did the unsharpen the jaggies started to come back... not as bad as the original... so i think it's going to be a compromise...

Subscribed. I have a tiger with jagged whiskers that I've not debugged yet.

fishingjts wrote in post #7376141
yep... and when i did the unsharpen the jaggies started to come back... not as bad as the original... so i think it's going to be a compromise...

I'd bet someone here knows how to do it without any compromises. I'll stay tuned.

Its just the small pixel count, thats all.

I had no end of trouble getting an avatar that stood up to being midget sized, in the end went for something artificial as you see.