Find dpi & Align center of Image

Question

Hi All,
I have new request but struggling in the below points:
1. Find less than 300 dpi image in the active document
2. Create text frame and fix center of the image vertically and horizotally.
Hope I completed the script by 90%
Completed Script:
var myGraphics = app.activeDocument.allGraphics;
var targetResolution = 300;
for (var i = 0; i < myGraphics.length; i++) {
    try
    if (myGraphics[i].effectivePpi[0] < 300) {
        var myPPI = myGraphics[i].effectivePpi[0] + " dpi"             //please ensure this line should be correct
        var myName = myGraphics[i].itemLink.name;
        var myPage = myGraphics[i].parentPage;
        var myCaption = myPage.textFrames.add();
        myCaption.textFramePreferences.verticalJustification = VerticalJustification.TOP_ALIGN;
        myCaption.contents = "FPO\r" + myName + "\r" + "Low Res " + myPPI;
        var bnds = myGraphics[i].parent.visibleBounds;
        myCaption.visibleBounds = [bnds[2] + 3, bnds[1], bnds[2] + 6, bnds[3]];
        myCaption.fit(FitOptions.FRAME_TO_CONTENT);
        try {
            var myPStyle = app.activeDocument.paragraphStyles.add({name: "Caption_lowres", justification: Justification.CENTER_ALIGN});
        } catch (myError) {
              myCaption.parentStory.appliedParagraphStyle = app.activeDocument.paragraphStyles.item("Caption_lowres");
        myPage.groups.add([myCaption, myGraphics[i].parent]);
catch(myError)
REQUIRED OUTPUT
But Current Output using above script
Thanks
Beginner_X

Answer 1

Hi Mr.Dave,
Thank you for your response...
I trying your code but I am not able to get the output.
Could you help to get the output for me.
var myGraphics = app.activeDocument.allGraphics;
var targetResolution = 300;
for (var i = 0; i < myGraphics.length; i++) {
    try
    if (myGraphics[i].effectivePpi[0] < 300) {
       var myPPI = myGraphics[i].effectivePpi[0] + " dpi"
        var myName = myGraphics[i].itemLink.name;
        var myPage = myGraphics[i].parentPage;
        var myCaption = myPage.textFrames.add();
        myCaption.textFramePreferences.verticalJustification = VerticalJustification.TOP_ALIGN;
        myCaption.contents = "FPO\r" + myName + "\r" + "Low Res " + myPPI;
        var bnds = myGraphics[i].parent.visibleBounds;
        myCaption.visibleBounds = [bnds[2] + 3, bnds[1], bnds[2] + 6, bnds[3]];
        var center = {x : (bnds[1] + bnds[3])/2, y : (bnds[0] + bnds[2])/2}
        var capCenter = {x : (capbnds[1] + capbnds[3])/2, y : (capbnds[0] + capbnds[2])/2}
        myCaption.move(undefined, [center.x - capCenter.x, center.y - capCenter.y]);
         myCaption.fit(FitOptions.FRAME_TO_CONTENT);
        try {
            var myPStyle = app.activeDocument.paragraphStyles.add({name: "Caption_lowres", justification: Justification.CENTER_ALIGN});
        } catch (myError) {
              myCaption.parentStory.appliedParagraphStyle = app.activeDocument.paragraphStyles.item("Caption_lowres");
        myPage.groups.add([myCaption, myGraphics[i].parent]);
catch(myError)
Help me to get output as per attached screenshot
Thanks
Beginner