I have seen several people with the same doubt, but I have not found anything solved.
If you open an image in GIMP and / or Photoshop and click Resize Image you can find out the resolution of the image and I want to do this, ie I want to figure out the image resolution with javascript or jquery or javascript or any other language that does this.
Please note that if you can find out the size of the image in cm, in, mm, m or any unit of measure other than digital (px), it will solve my problem, as I can do