photoshop优化psd文件大小的脚本

function deleteDocumentAncestorsMetadata() {
    whatApp = String(app.name);//String version of the app name
    if(whatApp.search("Photoshop") > 0)  { //Check for photoshop specifically, or this will cause errors
        //Function Scrubs Document Ancestors from Files
        if(!documents.length) {
        alert("There are no open documents. Please open a file to run this script.")
        return;
        }
        if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
        var xmp = new XMPMeta( activeDocument.xmpMetadata.rawData);
        // Begone foul Document Ancestors!
            xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");
            app.activeDocument.xmpMetadata.rawData = xmp.serialize();
         }
}
//Now run the function to remove the document ancestors
deleteDocumentAncestorsMetadata();

安装教程：电脑新建文本文档-以上代码复制进去保存-文件后缀名改为.Jsx

使用方法：

打开PSD文件-先择菜单栏的文件-脚本-浏览；
选择保存的.Jsx文件-点击载入；
等待自动处理完成，时间与文件大小和电脑配置有关，一般都需要几秒~几分钟；
完成后保存就可以看到文件变小啦，还不快快用起来。
github直接下载脚本：
https://github.com/MarshySwamp/deleteDocumentAncestorsMetadata

参考网页：https://zhuanlan.zhihu.com/p/354033249