Imagemagick resize

Question

I am familiar with convert -resize % for decreasing a size by percentage but what is the command to increase an image from say 700 pixels to 800 pixels? Horizontal width should resize, too. I need to preserve the overall quality and look of the image as best as possible.

EDIT:

mogrify -resize geometry

that appears to be what I need to resize the images. Link to article for the next person trying to figure out how to resize.

Answer 1

convert -resize $((800/7))%

or

convert -resize 114.28571%

would do the resizing. As for controlling the image quality, you might want to check the -filter and -support options.