2 Correct answers
Are you trying to get the actual (unscaled) pixel dimensions? An image has the effective ppi resolution property, so if the document units are set to inches, you can get the pixel dimensions. This gets the actual pixel (or inch) dimensions of a selected image:
var doc = app.activeDocument;
doc.viewPreferences.properties = {horizontalMeasurementUnits:MeasurementUnits.INCHES, verticalMeasurementUnits:MeasurementUnits.INCHES}
//a selected image
var sel = doc.selection[0];
//the actual pixel d
You can get the scale by dividing the Effective by Actual Res. Direct select an image and try this:
var s = app.activeDocument.selection[0]
//width and height as na array
var d = getWidthHeight(s);
if (s.constructor.name == "Image") {
var ep = s.effectivePpi
var ap = s.actualPpi
var w = (ep[0]/ap[0]) * d[0];
var h = (ep[1]/ap[1]) * d[1]
alert(w.toFixed (3) + " x " + h.toFixed (3))
} else {alert("Select an Image")}
/**
* Get a page item’s width and height
* @ param the page
43
Replies
Are you trying to get the actual (unscaled) pixel dimensions? An image has the effective ppi resolution property, so if the document units are set to inches, you can get the pixel dimensions. This gets the actual pixel (or inch) dimensions of a selected image:
var doc = app.activeDocument;
doc.viewPreferences.properties = {horizontalMeasurementUnits:MeasurementUnits.INCHES, verticalMeasurementUnits:MeasurementUnits.INCHES}
//a selected image
var sel = doc.selection[0];
//the actual pixel dimensions
$.writeln("Pixel Dimensions: " + getPixels(sel))
//returns Pixel Dimensions: 1920,1280
//the actual dimension in inches
var appi = sel.actualPpi
var aw = getPixels(sel)[0]/appi[0];
var ah = getPixels(sel)[1]/appi[1];
$.writeln("Actual Inch Dimensions: " + aw + " x " + ah)
/**
* returns the pixel dimensions of an image
* @param i an image
*/
function getPixels(i){
var r = i.effectivePpi;
var w = i.geometricBounds[3] - i.geometricBounds[1];
var h = i.geometricBounds[2] - i.geometricBounds[0];
var hpd = Math.round(w * (r[0]));
var vpd = Math.round(h * (r[1]));
return [hpd, vpd];
}
Hi Manan, I think Peter is looking for the image’s real or actual pixel dimensions.
InDesign’s Pixel ruler unit will measure an object in pixels, but InDesign defines the Pixel unit as a static 1/72". So here the Link panel shows the image’s actual pixel dimensions as 1920 x 1280, but InDesign’s transform panel measures the placed image as 345.6px x 230.4px:
When the rulers are set as inches the image’s width is 4.8", and 4.8*72=345.6.
When I trace your width and height on my image with an Actual Resolution of 400ppi, I get 345.6 x 230.4, and not the 1920 x 1280 pixel dimensions listed in Link Info
$.writeln("Dimensions: " + width + " x " + height)
//Returns Dimensions: 345.6 x 230.4
Hi @wobblewoo , a page item doesn’t have a width and height property, but you can write a function that extracts it from the geometricBounds property. I use this:
//a selected page item
var s = app.activeDocument.selection[0]
//width and height as an array
var d = getWidthHeight(s);
alert(d[0] + "x" + d[1])
/**
* Get a page item’s width and height
* @ param the page item
* @ return an array [width, height]
*
*/
function getWidthHeight(pi){
var wh = []
var gb = pi.geometricBounds
wh[0] = gb[3]-gb[1];
wh[1] = gb[2]-gb[0]
return wh
}
You can get the scale by dividing the Effective by Actual Res. Direct select an image and try this:
var s = app.activeDocument.selection[0]
//width and height as na array
var d = getWidthHeight(s);
if (s.constructor.name == "Image") {
var ep = s.effectivePpi
var ap = s.actualPpi
var w = (ep[0]/ap[0]) * d[0];
var h = (ep[1]/ap[1]) * d[1]
alert(w.toFixed (3) + " x " + h.toFixed (3))
} else {alert("Select an Image")}
/**
* Get a page item’s width and height
* @ param the page item
* @ return an array [width, height]
*
*/
function getWidthHeight(pi){
var wh = []
var gb = pi.geometricBounds
wh[0] = gb[3]-gb[1];
wh[1] = gb[2]-gb[0]
return wh
}
Hi @wobblewoo , I was assuming an image and getting the scale via the effective/actual res ratio, so we wouldn’t have to worry about transformation totals (could the link and its parent framed be scaled differently?). It could also work to set the transformationsAreTotals prefs to true and simply get the total scale. Try this:
var ot = app.transformPreferences.transformationsAreTotals
var doc = app.activeDocument
app.transformPreferences.transformationsAreTotals = true;
var s = doc.selection[0]
var d = getWidthHeight(s);
var sw = s.horizontalScale;
var sh = s.verticalScale;
var w = (100/sw) * d[0];
var h = (100/sh) * d[1];
app.transformPreferences.transformationsAreTotals = ot;
alert(w.toFixed (3) + " x " + h.toFixed (3))
/**
* Get a page item’s width and height
* @ param the page item
* @ return an array [width, height]
*
*/
function getWidthHeight(pi){
var wh = []
var gb = pi.geometricBounds
wh[0] = gb[3]-gb[1];
wh[1] = gb[2]-gb[0]
return wh
}
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