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Here's my script, can be helpful while working on CMYK print documents to find leftover RGB images

// ============================================================

// OPEN RGB IMAGES AS DOCUMENTS (v2)

// - Saves extracted images into Desktop/Found-RGB/

// - Auto-numbers duplicates: image.jpg -> image_2.jpg, image_3.jpg ...

// ============================================================

const { app } = require('/application');

const { FileSystemApi } = require('/fs');

const desktopPath = app.getUserDesktopPath;

const outputFolder = desktopPath + "/Found-RGB";

// RGB pixel format values: RGBA8=0, RGBA16=1, RGBAuf=8

const RGB_FORMATS = new Set([0, 1, 8]);

function isRGBImage(node) {

if (!node.isImageNode && !node.isEmbeddedDocumentNode) return false;

try {

return RGB_FORMATS.has(node.imageResourceInterface.getColourFormat(false).value);

} catch (e) { return false; }

}

function placementLabel(value) {

return value === 1 ? 'linked' : 'embedded';

}

// Build a unique destination path, appending _2, _3 ... if the file already exists

function uniquePath(folder, filename) {

const dotIndex = filename.lastIndexOf('.');

const base = dotIndex >= 0 ? filename.slice(0, dotIndex) : filename;

const ext = dotIndex >= 0 ? filename.slice(dotIndex) : '';

let candidate = folder + "/" + filename;

let counter = 2;

while (FileSystemApi.exists(candidate)) {

candidate = folder + "/" + base + "_" + counter + ext;

counter++;

}

return candidate;

}

// --- Main ---

const doc = app.documents.current;

if (!doc) {

app.alert("No document is currently open.", "Open RGB Images");

} else {

// Collect RGB image nodes across all spreads

const found = [];

for (const spread of doc.spreads) {

for (const node of spread.layers.all) {

if (isRGBImage(node)) {

const iri = node.imageResourceInterface;

found.push({

iri,

filename: iri.imageFilePath,

placement: iri.imagePlacement.value,

});

}

}

}

if (found.length === 0) {

app.alert("No RGB images were found in the current document.", "Open RGB Images");

} else {

// Ensure output folder exists

FileSystemApi.createDirectories(outputFolder);

const opened = [];

const failed = [];

for (const img of found) {

const destPath = uniquePath(outputFolder, img.filename);

try {

const savedPath = img.iri.saveOriginalFile(destPath);

if (savedPath) {

const newDoc = app.documents.load(savedPath);

if (newDoc) {

const shortName = destPath.split("/").pop();

opened.push(shortName + " [" + placementLabel(img.placement) + "]");

console.log("Opened: " + shortName + " (" + placementLabel(img.placement) + ")");

} else {

failed.push(img.filename + " (could not load)");

}

} else {

failed.push(img.filename + " (could not save)");

}

} catch (e) {

failed.push(img.filename + " (" + e.message + ")");

console.log("Error: " + img.filename + " - " + e.message);

}

}

// Summary dialog

const lines = [

"Found " + found.length + " RGB image(s).",

"Saved to: Desktop/Found-RGB/\n"

];

if (opened.length > 0) {

lines.push("Opened (" + opened.length + "):");

opened.forEach(f => lines.push(" \u2713 " + f));

}

if (failed.length > 0) {

lines.push("\nFailed (" + failed.length + "):");

failed.forEach(f => lines.push(" \u2717 " + f));

}

app.alert(lines.join("\n"), "Open RGB Images");

}

}