Lua Requires Chilkat v11.4.0+

AI Modify Existing Image with Text Prompt

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Uses an AI text prompt and uploaded image data to modify an existing image and receive the modified output. Lua

local chilkat = require("chilkat")

-- This example assumes the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

-- Load the data from an existing image.
local bdImageData = chilkat.BinData.new()
local success = bdImageData:load_file("qa_data/jpg/kid_blue_coat.jpg")
if not success then
    print(bdImageData.last_error_text)
    return
end

local ai = chilkat.Ai.new()

ai.provider = "openai"

-- Use your provider's API key.
ai.api_key = "MY_API_KEY"

-- Choose a model.
ai.model = "gpt-5.6-terra"

local askParams = chilkat.JsonObject.new()
askParams:update_string("image.output_format", "jpeg")
ai:set_ask_params(askParams)

ai:input_add_image_data(bdImageData, "")
ai:input_add_text("Modify the image by replacing the blue coat with a Metallica T-shirt.")

-- Give the AI some time (2 minutes).
ai.idle_timeout_ms = 120000

-- Ask the AI for image output.
success = ai:ask("image")
if not success then
    print(ai.last_error_text)
    return
end

-- Get the image response data.;
success = ai:get_output_bd(bdImageData)
if not success then
    print(ai.last_error_text)
    return
end

bdImageData:write_file("c:/aaworkarea/out.jpg")

print("Success.")

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-- Sample Input:
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-- Sample Output:
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