Trim with padding in imagemagick

How can I trim whitespace from an image but keep some padding with imagemagick?

I tried the -trim option but imagemagick crops down to the very edge of the content without leaving any padding.

Note, I don't want to add a border in some color but instead keep more of the original image.

Input

magick in.jpg -fuzz 5% -trim out.jpg

Expected Output

Actual Output

This ImageMagick v7 command is in Windows CLI syntax. (A version for IMv6 is described below.) It will read the input image, calculate the results of a "-trim" operation, adjust that geometry to provide for wider spacing all around, then create the output using "-extent" with the calculated dimensions and offsets...

magick input1.jpg -set page "%[@]" ^
   -set option:pad 0.15 ^
   -set option:wide "%[fx:page.width+(page.x*pad*2)]" ^
   -set option:high "%[fx:page.height+(page.y*pad*2)]" ^
   -set option:padx "%[fx:page.x-(page.x*pad)]" ^
   -set option:pady "%[fx:page.y-(page.y*pad)]" ^
   -extent "%[wide]x%[high]+%[padx]+%[pady]" ^
   +repage result1.png

Adjust the amount of extra space by changing the value of that "-set option:pad" variable. This is the result of running the above command on your example input image...

EDITED TO ADD: Nearly the same command can be made to work in ImageMagick v6 by applying those dimensions and offsets to a "-distort" viewport instead of using the "-extent" operation.

convert input1.jpg -set page "%[@]" ^
   -set option:pad 0.15 ^
   -set option:wide "%[fx:page.width+(page.x*pad*2)]" ^
   -set option:high "%[fx:page.height+(page.y*pad*2)]" ^
   -set option:padx "%[fx:page.x-(page.x*pad)]" ^
   -set option:pady "%[fx:page.y-(page.y*pad)]" ^
   -set option:distort:viewport "%[wide]x%[high]+%[padx]+%[pady]" ^
   -distort SRT 0 ^
   +repage resultv6.png

These commands can be easily converted to *nix shell commands by changing all the continued-line carets "^" to backslashes "\".

To use the commands in a Windows BAT script, double all the percent signs "%%".