Jagged edges when rotating images

[LillaBjorna]

I get jagged lines when I rotate an image in Indesign and even when I have exported the PDF. Why is this and how can I solve it?

 

[Robert at ID-Tasker]

To low resolution?

[Peter Spier]

Everything you see on screen is made of pixels, and any non-horizontal or no-vertical line or edge will be stair-stepped to some degree. depending on the slope, the screen resolution, and the effective resolution of the image.

Your screen previes is not the actual image, but another jpeg InDesign produces, which will usually degrade the appearance somewha tinside InDesign, but should not affect the PDF. If your images are excessively jaggy they are probably being used at too low a resolution,

[Laubender]

Hi @LillaBjorna ,

when you export to PDF do not downsample images.

Then check if the result is better.

Also:
Open the Links panel and check the Effective PPI value of that image.

Please tell us what it is.

Regards,
Uwe Laubender
( Adobe Community Expert )

[Randy Hagan]

Pixel images record information straight across, then straight up and down. By nature, you can expect that jaggedness because rotating that image off straight horizontal literally messes with the order of things.

The fastest fix I can recommend for masking the jaggies is giving the graphics frame a solid border to mask the jagged edge. Generally, a line border of 1 to 2 points will hide the ragged evidence at the scene of the crime.

Hope this helps,

Randy