Action that remove background and image batch process

Adding the white canvas to the script

// 2017, use it at your own risk;

#target photoshop

if (app.documents.length > 0) {

var myDocument = app.activeDocument;

var originalRulerUnits = app.preferences.rulerUnits;

app.preferences.rulerUnits = Units.PIXELS;

myDocument.selection.deselect();

// magic wand selection;

magicWandTool (10,10);

magicWandTool (myDocument.width-10,10);

magicWandTool (myDocument.width-10,myDocument.height-10);

magicWandTool (10,myDocument.height-10);

// invert selection;

myDocument.selection.invert();

// layer via copy;

var id14 = charIDToTypeID( "CpTL" );

executeAction( id14, undefined, DialogModes.NO );

var thisLayer = myDocument.activeLayer;

// hide others;

hideOthers ();

// remove potential dirt;

loadTransparency(false);

myDocument.selection.contract(10);

myDocument.selection.expand(15);

myDocument.selection.invert();

myDocument.selection.clear();

myDocument.selection.deselect();

// trim with 4px edge;

cropTo(thisLayer.bounds[0]-4, thisLayer.bounds[1]-4, thisLayer.bounds[2]+4, thisLayer.bounds[3]+4);

addPXtoCanvas (300,300);

activeDocument.flatten();

// reset ruler;

app.preferences.rulerUnits = originalRulerUnits;

};

////// function //////

function magicWandTool (theX, theY) {

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

var idslct = charIDToTypeID( "slct" );

    var desc12 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref5 = new ActionReference();

        var idmagicWandTool = stringIDToTypeID( "magicWandTool" );

        ref5.putClass( idmagicWandTool );

    desc12.putReference( idnull, ref5 );

/*    var iddontRecord = stringIDToTypeID( "dontRecord" );

    desc12.putBoolean( iddontRecord, true );

    var idforceNotify = stringIDToTypeID( "forceNotify" );

    desc12.putBoolean( idforceNotify, true );*/

executeAction( idslct, desc12, DialogModes.NO );

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

var idAddT = charIDToTypeID( "AddT" );

    var desc4 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref2 = new ActionReference();

        var idChnl = charIDToTypeID( "Chnl" );

        var idfsel = charIDToTypeID( "fsel" );

        ref2.putProperty( idChnl, idfsel );

    desc4.putReference( idnull, ref2 );

    var idT = charIDToTypeID( "T   " );

        var desc5 = new ActionDescriptor();

        var idHrzn = charIDToTypeID( "Hrzn" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc5.putUnitDouble( idHrzn, idPxl, theX );

        var idVrtc = charIDToTypeID( "Vrtc" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc5.putUnitDouble( idVrtc, idPxl, theY );

    var idPnt = charIDToTypeID( "Pnt " );

    desc4.putObject( idT, idPnt, desc5 );

    var idTlrn = charIDToTypeID( "Tlrn" );

    desc4.putInteger( idTlrn, 36 );

    var idAntA = charIDToTypeID( "AntA" );

    desc4.putBoolean( idAntA, true );

executeAction( idAddT, desc4, DialogModes.NO );/*

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

var idsetd = charIDToTypeID( "setd" );

    var desc2 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref1 = new ActionReference();

        var idChnl = charIDToTypeID( "Chnl" );

        var idfsel = charIDToTypeID( "fsel" );

        ref1.putProperty( idChnl, idfsel );

    desc2.putReference( idnull, ref1 );

    var idT = charIDToTypeID( "T   " );

        var desc3 = new ActionDescriptor();

        var idHrzn = charIDToTypeID( "Hrzn" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc3.putUnitDouble( idHrzn, idPxl, theX );

        var idVrtc = charIDToTypeID( "Vrtc" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc3.putUnitDouble( idVrtc, idPxl, theY );

    var idPnt = charIDToTypeID( "Pnt " );

    desc2.putObject( idT, idPnt, desc3 );

    var idTlrn = charIDToTypeID( "Tlrn" );

    desc2.putInteger( idTlrn, 36 );

    var idMrgd = charIDToTypeID( "Mrgd" );

    desc2.putBoolean( idMrgd, true );

    var idAntA = charIDToTypeID( "AntA" );

    desc2.putBoolean( idAntA, true );

executeAction( idsetd, desc2, DialogModes.NO );*/

};

////// hide others //////

function hideOthers () {

// hide others;

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

var idShw = charIDToTypeID( "Shw " );

    var desc2 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var list1 = new ActionList();

            var ref1 = new ActionReference();

            var idLyr = charIDToTypeID( "Lyr " );

            var idOrdn = charIDToTypeID( "Ordn" );

            var idTrgt = charIDToTypeID( "Trgt" );

            ref1.putEnumerated( idLyr, idOrdn, idTrgt );

        list1.putReference( ref1 );

    desc2.putList( idnull, list1 );

    var idTglO = charIDToTypeID( "TglO" );

    desc2.putBoolean( idTglO, true );

executeAction( idShw, desc2, DialogModes.NO );

};

////// load transparency //////

function loadTransparency (theInvert) {

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

var idsetd = charIDToTypeID( "setd" );

    var desc3 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref2 = new ActionReference();

        var idChnl = charIDToTypeID( "Chnl" );

        var idfsel = charIDToTypeID( "fsel" );

        ref2.putProperty( idChnl, idfsel );

    desc3.putReference( idnull, ref2 );

    var idT = charIDToTypeID( "T   " );

        var ref3 = new ActionReference();

        var idChnl = charIDToTypeID( "Chnl" );

        var idChnl = charIDToTypeID( "Chnl" );

        var idTrsp = charIDToTypeID( "Trsp" );

        ref3.putEnumerated( idChnl, idChnl, idTrsp );

    desc3.putReference( idT, ref3 );

    desc3.putBoolean(charIDToTypeID("Invr"), theInvert);

executeAction( idsetd, desc3, DialogModes.NO );

};

////// crop //////

function cropTo (x1, y1, x2, y2) {

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

var idCrop = charIDToTypeID( "Crop" );

    var desc7 = new ActionDescriptor();

    var idT = charIDToTypeID( "T   " );

        var desc8 = new ActionDescriptor();

        var idTop = charIDToTypeID( "Top " );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc8.putUnitDouble( idTop, idPxl, y1 );

        var idLeft = charIDToTypeID( "Left" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc8.putUnitDouble( idLeft, idPxl, x1);

        var idBtom = charIDToTypeID( "Btom" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc8.putUnitDouble( idBtom, idPxl, y2 );

        var idRght = charIDToTypeID( "Rght" );

        var idPxl = charIDToTypeID( "#Pxl" );

        desc8.putUnitDouble( idRght, idPxl, x2 );

    var idRctn = charIDToTypeID( "Rctn" );

    desc7.putObject( idT, idRctn, desc8 );

    var idAngl = charIDToTypeID( "Angl" );

    var idAng = charIDToTypeID( "#Ang" );

    desc7.putUnitDouble( idAngl, idAng, 0.000000 );

    var idDlt = charIDToTypeID( "Dlt " );

    desc7.putBoolean( idDlt, false );

    var idcropAspectRatioModeKey = stringIDToTypeID( "cropAspectRatioModeKey" );

    var idcropAspectRatioModeClass = stringIDToTypeID( "cropAspectRatioModeClass" );

    var idpureAspectRatio = stringIDToTypeID( "pureAspectRatio" );

    desc7.putEnumerated( idcropAspectRatioModeKey, idcropAspectRatioModeClass, idpureAspectRatio );

    var idCnsP = charIDToTypeID( "CnsP" );

    desc7.putBoolean( idCnsP, false );

executeAction( idCrop, desc7, DialogModes.NO );

};

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

function addPXtoCanvas (width, height) {

var idCnvS = charIDToTypeID( "CnvS" );

    var desc11 = new ActionDescriptor();

    var idRltv = charIDToTypeID( "Rltv" );

    desc11.putBoolean( idRltv, true );

    var idWdth = charIDToTypeID( "Wdth" );

    var idPxl = charIDToTypeID( "#Pxl" );

    desc11.putUnitDouble( idWdth, idPxl, width );

    var idHght = charIDToTypeID( "Hght" );

    var idPxl = charIDToTypeID( "#Pxl" );

    desc11.putUnitDouble( idHght, idPxl, height );

    var idHrzn = charIDToTypeID( "Hrzn" );

    var idHrzL = charIDToTypeID( "HrzL" );

    var idCntr = charIDToTypeID( "Cntr" );

    desc11.putEnumerated( idHrzn, idHrzL, idCntr );

    var idVrtc = charIDToTypeID( "Vrtc" );

    var idVrtL = charIDToTypeID( "VrtL" );

    var idCntr = charIDToTypeID( "Cntr" );

    desc11.putEnumerated( idVrtc, idVrtL, idCntr );

    var idcanvasExtensionColorType = stringIDToTypeID( "canvasExtensionColorType" );

    var idcanvasExtensionColorType = stringIDToTypeID( "canvasExtensionColorType" );

    var idBckC = charIDToTypeID( "BckC" );

    desc11.putEnumerated( idcanvasExtensionColorType, idcanvasExtensionColorType, idBckC );

executeAction( idCnvS, desc11, DialogModes.NO );

}