On Sat, 2019-07-20 at 20:28 -0400, Helen wrote: > Sorry! I meant to say, Is there a way, in GIMP, to size a picture to > precisely 1.5 megabytes?
For an 8-bit precisoin RGB image like JPEG, each pixel uses 3 bytes of memory. So the image will be three times bigger than we might expect. So, divige 1.5 megapixels by 3 and aim for that number. 1.5 megabyets is 1024 * 1024 * 1.5 is 1572864, but we have to divide that by three, which gives us 524288 pixels. So it's the same except with a new number: > > 1. divide 1572864 by the current image width in pixels. 1. divide 524288 by the current image width in pixels. > > > > 2. multiply that number by the image *height* in pixels > > 3. take the square root of that result > > 4. put that number into the Height field in Scale Image > > 5. the Width field should update auomatically To get the image size in the title bar (it's already in the status bar) go to Edit->Preferences; under Image Windows near the bottom is Title & Status. In there at the end of the Image Title Format, add a space and then (%m) to get the memory size. I also find it useful to put %EE at the start (with a space after it), which gives an E if the image has been exported since it was last changed. Liam -- Liam Quin, https://www.delightfulcomputing.com/ Available for XML/Document/Information Architecture/XSLT/ XSL/XQuery/Web/Text Processing/A11Y training, work & consulting. Web slave for vintage clipart http://www.fromoldbooks.org/ _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
