Output
Quality q
Defines the quality of the image. Use values between 0 and 100. Defaults to 90. Only relevant if the format is set to jpg.
<img src="kayaks.jpg?w=500&q=25>
Format fm
Encodes the image to a specific format. Accepts jpg, png or gif. Defaults to jpg.
<img src="kayaks.jpg?w=500&fm=gif>

