Quickly retrieve the Exif metadata

I have a script for Photoshop CC 2014 that makes some calculations of exposure based on the Exif metadata in the files value (EV) camera raw and then adjusts the exposure of the image to the EV of the target. I know that this information is quickly available in Bridge, but when I try to get the metadata in Photoshop, I use the document.open(), and command that opens the file (which takes a lot of time) instead of simply grasp the Exif metadata. I can get it quickly in a bridge script, but I'm having a hard time incorporating this kind of things in a targeted Photoshop script (the stuff of BridgeTalk is a bit confusing to me, or it does not work on my computer).

I also tried to use "bridge.executeScript ()", but the subject of bridge apparently is not available for targeting Photoshop scripts (otherwise something is inconsistent with my installation). Bridge is available in targeted only Bridge scripts.

Here's how it works in Photoshop scripts (I include only the party concerned).

	for (var nfile = start; nfile < nstop; nfile ++) {}
	var Name = File(testListing[nfile]).name.replace (/ \.) [ ^\.] +$/, '');
	var file = File (testListing [nfile] .path + "/" + name + ".") JPG');
	If (file.exists) {}
	App.Open (file);
	}
	else {}
	App.Open (testListing [nfile]);
	}
	var DocInfo = app.activeDocument.info;
	app.activeDocument = var docRef

	EV [nfile] = CalcEV (DocInfo, BaseISO);
	app.activeDocument.close (SaveOptions.DONOTSAVECHANGES);
	}

(FYI, I use the jpeg file if it's there because Photoshop reads the exif data for this file more quickly that it made from the raw file)

Here's how it works in scripts Bridge:

firstfile = ' 7A7A5842. CR2 ";

LastFile = ' 7A7A5843. CR2 ";

var ExifProperty = "exif:DateTimeOriginal";

var ExifNamespace = ' http://ns.adobe.com/exif/1.0/';

app.document.deselectAll ();

app.document.selectAll ();

var myThumbs = app.document.getSelection ("cr2");

var fstart = - 999;

var fend = - 999;

for (var n = 0; n < myThumbs.length; n ++) {}

If (myThumbs [n] .name == firstfile) fstart = n;

If (myThumbs [n] .name == lastfile) fend = n;

}

var %NUMFILES = myThumbs.length;

var fileThumbs = myThumbs.slice(fstart,fend);

FLEN = to fend fstart + 1;

var EVarray = new Array (flen);

for (var n = 0; n < fileThumbs.length; n ++) {}

var md = .metadata fileThumbs [n];

ISO = md.read(ExifNamespace,'exif:ISOSpeedRatings');

SS_string = md.read(ExifNamespace,'exif:ExposureTime');

var test = SS_string.split("/");

ShutterSpeed = test [0] / test [1];

var Aperture_string = md.read(ExifNamespace,'exif:FNumber');

If (Aperture_string == ") {}

var opening is Number (1.4);. assume Samyang at f1.4

}

else {}

var test = Aperture_string.split("/");

Opening test [0] = / test [1];

}

var ISOadjust = Number(1.);

EVarray [n] = Math.log(Math.pow(Aperture,2)/(ShutterSpeed*ISOadjust)) Math.LN2;

$.writeln ('ISO', ISO, "SS", SS, 'Av,' opening 'Is EV', EVarray [n]);

}

app.document.deselectAll ();

'Done... '. » ;

This example works for me with CS6 (don't have CC)

Create a folder "test" on the desktop and put some cr2 files in the folder and try the following script.

#target photoshop;
main();
function main(){
var bt = new BridgeTalk();
bt.target = "bridge";
bt.body = "var ftn = " + getInfoFromBridge.toSource() + "; ftn();";
bt.onResult = function( info ) { processInfo(eval( info.body ));}
bt.send(10);
};
function processInfo(info){
//do whatever to data
alert(info.join('\n'));
};

function getInfoFromBridge(){
var Info = [];
app.document.thumbnail = Folder("~/desktop/test");
app.document.deselectAll();
var thumbs = app.document.getSelection("cr2");
for(var a in thumbs){
var t = new Thumbnail(thumbs[a]);
var md = t.synchronousMetadata;
Info.push([[thumbs[a].name],[md.read( "http://ns.adobe.com/exif/1.0/","exif:FNumber")]]);
}
return Info.toSource();
};

Tags: Photoshop

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