txgen

Generate training data for scene text recognition

Installation

npm i txgen (-g for global install)

CLI example 1

500 character images based on regex pattern [0-9A-NP-Z#] with size 64x64 pixels and a padding of 4 pixels. Backgrounds come from directory ./backgrounds, fonts come from directory ./fonts. The output should be placed in directory ./chars-train and with the -d option files are placed in a directory with the name of the character and incremental file name (e.g., A/1.jpg, A/2.jpg, ...).

txgen -b ./backgrounds -f ./fonts -o ./chars-train -p "[0-9A-NP-Z#]" --number 500 -w 64 -h 64 -a 4 -d

CLI example 2

Similar to the above example, but with a different regex and no specified width (width is dynamically calculated based on length of generated text). The files are placed inside the output folder ./serial-numbers.

txgen -b ./backgrounds -f ./fonts -o ./serial-numbers -p "[A-NP-Z0-9#][A-NP-Z0-9\-]{2,10}[A-NP-Z0-9]?" --number 500 -h 64 -a 10 -d

CLI Options

Option	Description	Required
`-b`	Path to directory with background image files	✓
`-f`	path to directory with .ttf font files (e.g., downloaded from dafont)	✓
`-o`	Output directory of generated files
`-t`	A text string which should be generated
`-a`	Padding in pixels between image border and generated text
`-p`	A regex pattern which defines strings to be generated (use either `-t` or `-p`)
`-n`	The total number of output images which should be generated
`-s`	The font size which should be used in pixels
`-w`	The width of the output image in pixels
`-h`	The height of the output image in pixels
`-d`	The generated output should be placed in directories with text/pattern name and incremental filenames