AI Image Generation

This skill guides you on how to generate and edit images using the AI image generation service, helping users create high-quality product images, modify existing images, and perform creative visual transformations.

Core Concepts

The AI Image Generation tool produces new images based on a text prompt and optional reference images. It supports a wide range of use cases:

• Text-to-image: Generate a brand-new image purely from a text description.
• Image-to-image: Provide one or more reference images and a prompt to generate a new image that preserves elements from the references.
• Image editing: Modify specific elements, colors, backgrounds, or styles in an existing image.
• Product compositing: Place a product from one image into a scene from another image.
• Model swapping: Replace the model or mannequin in a product photo.

Reference images are strongly recommended when the user wants the output to closely resemble an existing product or scene. Up to 3 reference image URLs can be provided, separated by commas.

Parameter Guide

Parameter	Required	Description	Default
prompt	Yes	Text description of the desired image. Supports text-to-image, image-to-image, editing, model swapping, and more. Max 1000 characters.	--
referenceImageUrl	No	URL(s) of reference image(s). Separate multiple URLs with commas. Up to 3 images supported. Max 1000 characters.	--
aspectRatio	No	Aspect ratio of the output image.	1:1

Supported Aspect Ratios

Value	Description
1:1	Square (default)
3:4	Portrait
4:3	Landscape
9:16	Vertical fullscreen
16:9	Horizontal fullscreen

Prompt Writing Tips

1. Be specific and descriptive: Clearly describe the subject, scene, lighting, style, and mood you want.
2. Reference images by number: When using reference images, refer to them as "image 1," "image 2," etc., in the order they appear in referenceImageUrl.
3. State the operation explicitly: Use clear action verbs like "replace," "change," "put," "combine," "generate."
4. Keep within 1000 characters: Prompts have a maximum length of 1000 characters.

Prompt Examples by Scenario

Object replacement:

Replace the vase on the table in image 1 with a potted plant

Background color change:

Change the background color of image 1 to pure white

Product compositing:

Place the product from image 2 onto the marble countertop in image 1

Style transfer:

Transform image 1 into the artistic style shown in image 2

Text-to-image (no reference):

A professional product photo of a sleek black wireless headphone on a gradient blue background, studio lighting, 8K quality

Model swapping:

Replace the model in image 1 with a different model while keeping the same clothing and pose

Usage

• API Endpoint: POST /multimodal/generateImage (see references/api.md for full parameters, responses, and error codes)
• Python Script: python scripts/multimodal_generate_image.py '<JSON parameters>'

Output strategy (script default behavior):

• Prints the full JSON response to stdout

Data reading tip: Use jq or ConvertFrom-Json to extract specific fields from the response as needed.

Display Rules

1. Show the generated image: When the response contains image content in the text field, display it directly to the user using markdown image syntax.
2. Status reporting: Check the status and finished fields. If image generation is still in progress, inform the user and advise waiting.
3. Prompt transparency: Briefly describe what prompt and parameters were sent so the user understands what was requested.
4. Aspect ratio confirmation: If the user does not specify dimensions, use the default 1:1 ratio but mention it so they can request a different ratio if needed.
5. Reference image guidance: If the user wants a result close to an existing image but did not provide a reference URL, proactively suggest they provide one for better fidelity.
6. Error handling: When generation fails, explain the issue based on the response status field and suggest adjustments (e.g., simplify the prompt, check reference image URLs, try a different aspect ratio).

Important Limitations

• Reference image limit: A maximum of 3 reference image URLs can be provided per request.
• Prompt length: The prompt must not exceed 1000 characters.
• URL validity: Reference image URLs must be publicly accessible. Private or expired URLs will cause failures.
• Aspect ratio options: Only 1:1, 3:4, 4:3, 9:16, and 16:9 are supported.

User Expression & Scenario Quick Reference

Applicable -- Requests involving image generation or editing:

User Says	Scenario
"Generate an image," "Create a picture"	Text-to-image generation
"Edit this photo," "Modify the image"	Image editing
"Change the background," "Make it white background"	Background replacement
"Put the product on this scene"	Product compositing
"Make it look like this style"	Style transfer
"Swap the model," "Change the person"	Model swapping
"Create a product photo"	Product image generation
"Make a vertical/landscape version"	Aspect ratio adjustment

Not applicable -- Needs beyond image generation:

• Image analysis or recognition (reading text from images, identifying objects)
• Video generation or editing
• Image file format conversion
• Batch processing of hundreds of images
• Image hosting or storage

Authentication

Set NEXSCOPE_API_KEY. Visit https://www.nexscope.ai/help/skills-external-access?co-from=skillNS to manage credits.