Determining image rescale factors

A system to rescale an image to be printed, comprising:

• a processing resource;
• and
• a non-transitory machine-readable storage medium coupled to the processing resource and comprising instructions executable by the processing resource to
• receive a print job including instructions for printing of an image at a pixel resolution;
• cause a presentation of the image, at the pixel resolution, at a display device;
• designate a first reference feature and a second reference feature inside the presented image;
• determine a number of pixels in an interval separating the first and second reference features;
• receive a numerical designation of a real distance between the first and second reference features;
• receive a desired scale for the image;
• in consideration of the pixel resolution, the determined number of pixels, and the real distance, determine an actual scale for the image;
• and
• in consideration of the actual scale and the desired scale, determine a rescale factor and apply the factor to rescale the image to the desired scale.

A method to rescale an image to be printed, comprising:

• obtaining a print job with instructions for printing an image at a pixel resolution;
• causing a display of the image, at the pixel resolution, at a display device;
• receiving a selection of first and second references within the image via a displayed graphic user interface;
• in response to the selection, displaying a bridging element between the selected first and second references;
• determining a number of pixels between the first and second references;
• receive a numerical value of real distance between the first and second references via a displayed graphic user interface;
• receiving the desired scale via a displayed graphic user interface;
• determining an actual scale for the image based on the pixel resolution, the pixel number, and the real distance;
• determining a rescale factor for the image by dividing the desired scale by the actual scale;
• and
• adjusting the actual scale of the image by the rescale factor, to rescale the image from the actual scale to the desired scale.