3222ppi is way to high image resolution. But lines will always be pixelated if they are in a raster image. If it is a drawing, you should not use a pixel image, use instead a vector graphic.
I thought it was rather high but didn't think it could do any harm. It's with the product photographs of the furniture where I am having the trouble so vector won't work. The pictures need to be as crisp as possible to be able to see grain in the wood. I am using jpeg 300dpi images that are roughly 2000px square then resizing them to 461px in In Design.
Is there a better option to my process? what is a good effective ppi for an image printing at roughly 4cm square? Are jpegs sufficient enough for these types of images or should I import another format?
Thanks for your help
300ppi (not dpi) are in most cases roughly enough as effective resolution. When it comes to the image structure, I would recommend to scale these images in Photoshop, so you will place them later with 300ppi at 100% scaling in InDesign. In Photoshop you can do sharpening (USM or Smart Sharpening) an see how the best is with the structure and I thing you will have to print a proof because a structure can produce with the image screening a moíre pattern which you must avoid but we cannot tell your here and even not on your screen because this moíre will be visible only in print.
I will try scaling them to 100% 300ppi and then importing them to In Design, the images are high quality so shouldn't need sharpening.
Really appreciate the help and quick response,
EVERY digital image NEEDS SHARPENING before printing. That is not something of quality or missed focus, it is a techique to improve print quality (and even on-screen).
Evere digital image needs sharping after resizing it!
If you have sharp edges in the photos that are not true vertical or true horizontal you might want to increase the effective PPI to 600 or even 800. All lines or edges that don't align to the pixel grid must be rendered as stair-steps, and in a short distance with very few pixels to spread the steps across this can become quite noticeable.