Recommendation for compressing JPG files with ImageMagick

Question

I want to compress a JPG image file with ImageMagick but can\'t get much difference in size. By default the output size is bigger than the input. I don\'t know why, but afte

Answer 1

Once I needed to resize photos from camera for developing:

• Original filesize: 2800 kB
• Resolution: 3264x2448

Command:

mogrify -quality "97%" -resize 2048x2048 -filter Lanczos -interlace Plane -gaussian-blur 0.05 

• Result filesize 753 kB
• Resolution 2048x2048

and I can't see any changes in full screen with my 1920x1080 resolution monitor. 2048 resolution is the best for developing 10 cm photos at maximum quality of 360 dpi. I don't want to strip it.

edit: I noticed that I even get much better results without blurring. Without blurring filesize is 50% of original, but quality is better (when zooming).