How do we get the Pixel/Centimeter information ImageSize window [through Javascript]

[yajiviki]

Hi Everyone!,

Is this possible to get Pixel/Centimeter information ImageSize window through JavaScript?

Thank in Advance

[Kukurykus]

activeDocument.resolution / 2.54

[Stephen_A_Marsh]

Curious minds need to know...

Photoshop image size truncates the display to 3 decimal places for a 240 PPI doc:

From: 94.488188976378 PPCM

To: 94.488 PPCM

var docResCM = app.activeDocument.resolution / 2.54;
var docResFixed = docResCM.toFixed(3);
var docResRounded = Math.round(docResCM * 1000) / 1000;
alert(docResCM + "\r" + docResFixed + "\r" + docResRounded);

The code above results in 94.488

However - Math.trunc(n) is not supported if I understand things correctly to easily chop off after (3).

Surely there must be a better way to truncate to 3 places than to transform the number into a string, regex remove all digits after the dot + 3 places, and then possibly return the string to a number if the end use requires a number for further calculations?

P.S. In the screenshot above, the truncation is to 2 decimal places, however, mine truncates to 3?

118.110236220472441

[Kukurykus]

29.8 * 22.15 == 660.07 // false

[r-bin · Accepted solution]

You can do it like this

//activeDocument.save(); // must be saved to force update metadata 

var xmp = new XML(activeDocument.xmpMetadata.rawData);  
var s = String(eval("xmp.*::RDF.*::Description.*::ResolutionUnit"));  

if (s == "3") alert("cm")
if (s == "2") alert("inch")

upd. I don't seem to understand again. I am groot .... : )

[yajiviki]

Hi R-bin,

Thank you for the prompt response. It's working like a charm.

Is this possible to change Pixel/Centimeter to Pixel/Inch using java script?

-yajiv

[Stephen_A_Marsh]

I'm not r-bin, so I'm not sure if this is out of context or if I am misunderstanding... Multiplication is the opposite of division. So swap / 2.54 for * 2.54

[Kukurykus]

That's question to r-bin. Btw, why are you littering this thread?

[Stephen_A_Marsh]

Littering? Contributing? Learning? Disenchanted?

[Kukurykus]

What do you mean by your post?

[yajiviki]

Hi Kukurykus,

I'm not doing like that Btw, I have collected different types of altrenate solutions for the same question/thread.

[Kukurykus]

Yes, you do. You posted the same content over here within 10 minutes.

[yajiviki]

Hi Kukurykus,

At this time I'm facing a network issue and I really don't know whether the first post was upload or not.

For this reason,  again I repost that it. If you think I make this thread Littering.

Sorry for the inconvenience.

[Kukurykus]

XML(activeDocument.xmpMetadata.rawData)
['rdf:RDF']['rdf:Description']['tiff:ResolutionUnit']

[yajiviki]

Hi Kukurykus,
Thank you for your prompt response.

Is this possible to change Px/Cm to Px/In via JavaScript?

[yajiviki]

Hi R-bin,

Thank you for the prompt response. It's working like a charm.

Is this possible to change Pixel/Centimeter to Pixel/Inch using java script?

-yajiv

[r-bin]

I dont know.

You can try the following.

1. Select all

2. Run the copy command

3. Create a new document from the clipboard (will be in inches)

4. Select and copy all layers into a new document.

5. Remove the old layer.

6. Close the original document.

7. Save the new document over the old one.

Code can be obtained using the ScriptListener plugin.

[yajiviki]

Hi R-bin,

Thank you for your suggestion.

[Kukurykus]

You may try also this code handling .psd files probably up to 500 MB:

re = /(8BIM\x03\u00ED\x00\x00\x00\x00\x00\x10)(?:((?:[^\n]|[\n]){5})((?:[^\n]|[\n]))((?:[^\n]|[\n]){2})){2}/
preferences.autoUpdateOpenDocuments = true, (fle = activeDocument.fullName).open('r'), fle.encoding = 'binary'
r = (fle.read()).replace(re , function(_, v2, v3, _, v5) {return v2 + (end = v3 + '\x01' + v5) + end}), fle.open('w')
fle.write(r); (documents.add(uv = UnitValue('1 px'), uv, 1)).close(SaveOptions.DONOTSAVECHANGES)

[r-bin]

Not sure if this is a good idea. As a result, I got a file in which ImageSize shows inches, and EXIF and XMP show centimeters.

upd.

I think it will be more reliable to make a clicker.

Sequence needs to be sent: ctrl+alt+i, alt+r, tab, up, enter.

upd2

Question. Why create and close a document?

[Kukurykus]

Yes, it only rewrites 2 instances of same value. The metadata could be also updated by script or just cleared 🙂 The combinations of self pressed keys by for example vbscript is an idea too. The need of creating new document is to change focus from the document to other one that is automaticaly closed. Thanks to it the ResolutionUnit is updated.