Manipulate an Image with Scripting 5

select the image layer, rotate it then merge them.
Final Script:preferences.rulerUnits = Units.PIXELS;
displayDialogs = DialogModes.NO
open(File(openDialog()));
var docRef_1 = activeDocument;
docRef_1.backgroundLayer.duplicate();
var white = new SolidColor();
white.rgb["hexValue"] = "ffffff"
var black = new SolidColor();
black.rgb["hexValue"] = "000000"
foregroundColor = black;
backgroundColor = white;
docRef_1.selection.selectAll();
docRef_1.selection.fill(white);
docRef_1.selection.deselect();
docRef_1.layers[0].duplicate();
docRef_1.activeLayer = docRef_1.layers[0];
docRef_1.activeLayer.applyAverage();
for (RLevel = 0; RLevel <= 255; RLevel ++) {
if (docRef_1.channels["Red"].histogram[RLevel]) {
break;
}
}
for (GLevel = 0; GLevel <= 255; GLevel ++) {
if (docRef_1.channels["Green"].histogram[GLevel]) {
break;
}
}
for (BLevel = 0; BLevel <= 255; BLevel ++) {
if (docRef_1.channels["Blue"].histogram[BLevel]) {
break;
}
}
var R = 0;
var G = 0;
var B = 0;
if (RLevel > GLevel && RLevel > BLevel) {
R = 255;
}
if (GLevel > BLevel && GLevel > RLevel) {
G = 255;
}
if (BLevel > RLevel && BLevel > GLevel) {
B = 255;
}
var color = new SolidColor();
color.rgb.red = R;
color.rgb.green = G;
color.rgb.blue = B;
docRef_1.selection.selectAll();
docRef_1.selection.fill(color);
docRef_1.selection.deselect();
docRef_1.activeLayer.invert();
docRef_1.activeLayer.blendMode = BlendMode.COLORBLEND;
docRef_1.activeLayer.opacity = 50;
docRef_1.activeLayer.merge();
var width = docRef_1.width;
var height = docRef_1.height;
if (width <= height) {
var borderSize = Math.round(width * 0.15);
}
else {
var borderSize = Math.round(height * 0.15);
}

docRef_1.resizeCanvas(width + borderSize, height + borderSize);
docRef_1.artLayers.add();
docRef_1.activeLayer.move(docRef_1.backgroundLayer, ElementPlacement.PLACEBEFORE);
docRef_1.selection.selectAll();
docRef_1.selection.fill(white);
docRef_1.selection.deselect();
docRef_1.layers[0].merge();
docRef_1.artLayers.add();
docRef_1.activeLayer.move(docRef_1.backgroundLayer, ElementPlacement.PLACEBEFORE);
docRef_1.selection.selectAll();
docRef_1.selection.fill(black);
docRef_1.selection.deselect();
var width = docRef_1.width;
var height = docRef_1.height;
var newSize = Math.round(Math.sqrt(width * width + height * height)) + borderSize;
docRef_1.resizeCanvas(newSize, newSize);
docRef_1.activeLayer.applyGaussianBlur(borderSize / 3);
docRef_1.activeLayer.opacity = 50;
var angle = Math.round(Math.random() * 40) - 20;
docRef_1.activeLayer.rotate(angle, AnchorPosition.MIDDLECENTER);
docRef_1.activeLayer = docRef_1.layers[0];
docRef_1.activeLayer.rotate(angle, AnchorPosition.MIDDLECENTER);
docRef_1.activeLayer.merge();