Script to open a file and zoom to pixel

Question

Hi, I work for a mapping company and one of our digital camera has a fault with the lens resulting in a small black mark appearing in exactly he same location of every image we capture what I would like is a script that can be used to open a file set the zoom say to 100% and move to pixel 3324x5493 so I user can repair it.
I thought this would be simple but I've been looking all evening without finding anything
Thanks
Stu

Answer 1

I have something started but it isn't quite finished. It will center on the pixel and zoom in, but the only holdback is it increases the canvas size which will need to be cropped later. If you first set the Background layer to a non-Background layer your extra canvas will be transparent which will allow for a simple trim to return to the normal image later.
function centerON (x,y) {
    var startRulerUnits = app.preferences.rulerUnits;
    var startTypeUnits = app.preferences.typeUnits ;
    var startDisplayDialogs = app.displayDialogs;
    app.preferences.rulerUnits = Units.PIXELS;
    app.preferences.typeUnits = TypeUnits.PIXELS;
    app.displayDialogs = DialogModes.NO;
    var centerDoc=app.activeDocument;
    w=centerDoc.width.value;
    h=centerDoc.height.value;
    hdiff=Math.round(Math.abs((x-w/2)*2));
    vdiff=Math.round(Math.abs((y-h/2)*2));
    if (x>w/2) {var hor="LEFT";}
    else if (x<w/2) {var hor ="RIGHT";}
    else {var hor="CENTER";}
    if (y>h/2) {var ver="TOP"; }
    else if (y<h/2) {var ver="BOTTOM"; }
    else {var ver="MIDDLE"; }
    newwidth=w+hdiff;
    newheight=h+vdiff;
    switch (ver) {
        case "TOP":
        switch (hor) {
            case "LEFT": anchor=AnchorPosition.TOPLEFT; original=[0,0,w,h]; break;
            case "RIGHT": anchor=AnchorPosition.TOPRIGHT; original=[hdiff,0,hdiff+w,h]; break;
            case "CENTER": anchor=AnchorPosition.TOPCENTER; original=[0,0,w,h]; break;
        }; break;
        case "BOTTOM":
        switch (hor) {
            case "LEFT": anchor=AnchorPosition.BOTTOMLEFT; original=[0,vdiff,w,vdiff+h]; break;
            case "RIGHT": anchor=AnchorPosition.BOTTOMRIGHT; original=[hdiff,vdiff,hdiff+w,vdiff+h]; break;
            case "CENTER": anchor=AnchorPosition.BOTTOMCENTER; original=[0,vdiff,w,vdiff+h]; break;
        }; break;
        case "MIDDLE":
        switch (hor) {
            case "LEFT": anchor=AnchorPosition.MIDDLELEFT; original=[0,0,w,h]; break;
            case "RIGHT": anchor=AnchorPosition.MIDDLERIGHT; original=[vdiff,0,vdiff+w,h]; break;
            case "CENTER": anchor=AnchorPosition.MIDDLECENTER;original=[0,0,w,h]; break;
        }; break;
    app.runMenuItem(charIDToTypeID("FtOn"));
    centerDoc.resizeCanvas(newwidth,newheight,anchor);
    app.runMenuItem(charIDToTypeID("ActP"));
    app.refresh();
//    centerDoc.trim();
//    centerDoc.crop(original);
    app.preferences.rulerUnits = startRulerUnits;
    app.preferences.typeUnits = startTypeUnits;
    app.displayDialogs = startDisplayDialogs;
centerON(234,3500);
For centerON(234,3500); you would of course input your own x,y coordinates where you want to center the image.
The issue I'm having is that if I trim or crop the image, it will sometimes re-center the image elsewhere. I've tried using a crop with hide to center on the pixel then Reveal All to show the whole image again, but that also re-centers the image. Though, that may actually be a better way for you to do it afterall. Instead of increasing the canvas size, you could crop with hide to put the center on the pixel you want, then when finished just Reveal All.
It would just be easier if Photshop kept focus centered during a crop.