Subject Outline

Overview

The Image Editing API allows you to easily add a colored outline around the subject of your images.

outline.color

To add a colored outline to the subject of an image, set the outline.color argument to a solid color value.

It can be any hexadecimal color code without the # symbol (examples: FF0000, FF0000EE) or a supported color name (see list below).

(original image)	outline.color=white

List of supported color names

• aqua

• black

• blue

• cyan

• fuchsia

• gray

• green

• lime

• magenta

• maroon

• navy

• olive

• purple

• red

• silver

• teal

• white

• yellow

To preserve the background, you must also set removeBackground to false.

If you want to give it a try, here is a code snippet to reproduce the example above:

curl --request POST \
 --url 'https://image-api.photoroom.com/v2/edit' \
 --header 'x-api-key: YOUR_API_KEY_HERE' \
 --form 'imageFile=@"/path/to/image.png"' \
 --form 'outline.color="white"' \
 --form 'referenceBox="originalImage"' \
 --form 'removeBackground="false"' \
 --output result.png

Try it now!

Additional Parameters

outline.width

To control the width (thickness) of the outline, set the argument outline.width to a value between 0 and 0.1.

The value represents a ratio of the image size, where 0.1 (10%) is the maximum thickness.

When this argument is not provided, the API applies a default value of 0.03.

Suggested values:

• 0.01-0.02: Subtle/thin outline

• 0.03-0.05: Standard/medium outline

• 0.06-0.1: Bold/thick outline

outline.width=0.01	outline.width=0.03	outline.width=0.1

outline.blurRadius

You can apply blur to the outline to create a glow or soft edge effect.

To control the blur strength of the outline, set the outline.blurRadius argument to a value between 0 (no blur) and 0.025 (maximum blur).

When this argument is not provided, the API applies a default value of 0.

outline.blurRadius=0	outline.blurRadius=0.01	outline.blurRadius=0.025

Examples

(original image)	(edited image)
	outline.color=white & outline.width=0.03 & removeBackground=false
	outline.color=white & outline.width=0.02 & outline.blurRadius=0.02 & removeBackground=false
	outline.color=black & outline.width=0.02 & removeBackground=true
	outline.color=fcfc03 & outline.width=0.1 & outline.blurRadius=0.01 & removeBackground=false