ppmlabel
Add text labels to PPM images
TLDR
Add text label to image
$ ppmlabel -text "[Hello World]" [input.ppm] > [output.ppm]
Add label at specific position$ ppmlabel -x [10] -y [20] -text "[Label]" [input.ppm] > [output.ppm]
Add label with custom color and size$ ppmlabel -color [white] -size [24] -text "[Label]" [input.ppm] > [output.ppm]
Add rotated label$ ppmlabel -angle [45] -text "[Watermark]" [input.ppm] > [output.ppm]
Add label with background highlight$ ppmlabel -background [black] -color [yellow] -text "[Warning]" [input.ppm] > [output.ppm]
Add multiple labels using a script file$ ppmlabel -file [labels.txt] [input.ppm] > [output.ppm]
SYNOPSIS
ppmlabel [options] [file]
DESCRIPTION
ppmlabel adds text labels to PPM (Portable Pixmap) images. It reads a PPM image, renders one or more text strings at specified positions with optional color, size, and rotation, and writes the result as a new PPM image. Part of the Netpbm toolkit.Multiple labels can be placed on a single image by specifying multiple -text options or by using the -file option to read label specifications from a file. Each label can have independent position, color, size, and angle settings.
PARAMETERS
-text string
Text string to render on the image.-file filename
Read label commands from a file, one per line.-x pixels
Horizontal position of the label from the left edge.-y pixels
Vertical position of the label baseline from the top edge.-color color
Text color (Netpbm color name or #rrggbb hex value).-background color
Background color behind the text. Default is transparent (no background).-angle degrees
Rotation angle in degrees counterclockwise. Default is 0.-size pixels
Font height in pixels. Default depends on the built-in font.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm
CAVEATS
Uses a built-in bitmap font; does not support TrueType or external fonts. For more advanced text rendering, consider pbmtext piped through pnmcomp. Input and output are PPM format only.