Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

Excellent! Thank you.

DirtFarmer Loc: Escaped from the NYC area, back to MA

I use jpg for photos generally. I use png for photos with transparency when it's required, not otherwise. But the png compression is lossless. https://en.wikipedia.org/wiki/Portable_Network_Graphics#Compression

I did a study of jpgs to see what sort of problems are created by the compression. A synopsis of the study is here and contains a pointer to the full document (14 pages). Basically I don't see any real problems with jpgs for normal use as long as the compression used is reasonable. The compression level can generally be chosen when the file is written but different programs use different numbers to control the compression so you have to know just which number to use for your program.

I invite you to check for yourself the effect of compression. I find it difficult to compare two images side by side, but if you overlay them and alternately view one, then the other using a blink test you can see the effects much more easily. There are several ways to do a blink test. One way is to load the two images to be compared into Photoshop as separate layers, then just turn the top layer on and off. You can zoom in to see the effect on small areas, right down to pixel level. You will see differences, but the higher compression images will, as expected, show larger differences. Whether the differences are enough to produce a noticeable change in the image will be up to the individual viewer.

DirtFarmer Loc: Escaped from the NYC area, back to MA

I only mentioned png files because the OP didn't like lossy compression. The only time I use them is when I need transparency.*

* I create plots using png because I have not yet figured out how to add a good color space to a jpg in Python when saving a graph bitmap as an image in my graphing program. Also, I use Pixea on my MacBook because it handles files within a folder in a way similar to IrfanView (Windows only) which I have used for a couple decades. But it doesn't print worth a damn. Preview handles printing well but doesn't handle files the way I'm used to. So jpgs go to Pixea and pngs go to Preview as the default viewer. If I want to print a jpg I can 'open with' Preview, but it's not as simple as using the default viewer.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

Thanks for your in-depth reply. Good information, but I like to keep it simple and easy. I default to the easiest way to get lossless images. The only time I use jpegs is when I am posting something to the web. They do not degrade when opened on the web as they are not re-saved. When working on images, I use RAW and TIFFs. PNG for logos.

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

An eerie masterpiece 🕷️🕷️🕷️🕷️🕷️

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

Mindbogglingly impressive
🥇🥇⭐🥇🥇

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

Thank you so much!!!