ps导出jpg图片好几十M，远远超过应该大小

1、新建一文本文档。

2、把以下代码复制到建立的文本文档并保存

function deleteDocumentAncestorsMetadata() {

    //String version of the app name    whatApp = String(app.name);

    // Check for photoshop specifically, or this will cause errors    if(whatApp.search("Photoshop") > 0) {

        // 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 ancestorsdeleteDocumentAncestorsMetadata();

3、更改文本文档后缀名为.jsx

4、打开ps文件（导出jpg很大的文件），执行‘文件’——‘脚本’——‘浏览’命令。选中jsx文件。点击确定即可！！