Google Apps script for performing OCR on all images of a certain type found in the specified Drive folder. Extracts text to a Google sheet, where it's mapped to the image's filename.

batch_ocr.gs

function extractTextOnOpen() {

    //ADD YOUR VALUES BELOW
    var folderName = "[YOUR FOLDER NAME]";
    var sheetUrl = "[YOUR SHEET URL] (should start with https://docs.google.com/spreadsheets/d/)"
    var imageType = "image/png"

    //Define folder
    var folder = DriveApp.getFoldersByName(folderName).next();
    var folderId = folder.getId();

    //Set up spreadsheet
    var ss = SpreadsheetApp.openByUrl(sheetUrl);
    var sheet = ss.getSheetByName("Sheet1")
    Logger.log(sheet.getName());
    sheet.clear();
    sheet.appendRow(["Filename", "Text"]);

    //Find all images in folder
    var images = folder.getFilesByType(imageType);
    while (images.hasNext()) {
    	//Convert each image to a Google Doc with OCR
        var image = images.next();
        var imageName = image.getName();
        var docName = imageName.split("\.")[0];
        var file = {
            title: docName,
            mimeType: imageType
        }
        Drive.Files.insert(file, image, { ocr: true });
        
        //Move newly-created Google Doc in project folder
        var newFile = DriveApp.getFilesByName(docName).next();
        folder.addFile(newFile);

        var rootFolder = DriveApp.getRootFolder();
        rootFolder.removeFile(newFile);

        var docId = newFile.getId();
        var doc = DocumentApp.openById(docId);
        var name = doc.getName();
        var body = doc.getBody().getText();
        //Add item data to spreadsheet
        sheet.appendRow([name, body]);
    }
};