Resize images and expand canvas

[Bob87]

Hi,

I am new to this, so I actually have no idea if the thing I try to achieve is possible. That's why I'm here.
I am having 1000 images of different sizes. The thing I want to do is to have images all of 250x250px.

I already thought about it, i think it should have to check if the width is the largest or the height. Then scale that largest width/height to 250 px and scale the corresponding height/width with the same aspect ratio. Then it should enlarge the canvas size to 250x250px with a white background color.

I just really don't have an idea if this is possible, and doing this manual will take me ages!

Thanks!

[txuku]

Bonjour Bob87

You can take a look at this topic : Simple resizing script - Help

[Bob87]

Thanks! I am going to take a look at it, at first sight this is just what I need

Hero!

[Bob87]

Hi,

I tried to use it, but it is causing an error...

What i did: I took the script and put it in a .txt file, then I renamed it to a .jsx. Then in photoshop cs5, I went to File - scripts - browse and selected the .jsx file. It asks me to select the folder, it all goes well at first sight, but then suddenly it stops and gives following error:

Code: Select allError 8800: General Photoshop error occurred. This functionality may not be available in this version of Photoshop. -The parameters for command "Save" are not currently valid. Line: 129 -> app.activeDocument.saveAs(File(filename),jpegOptions, false);

It stops at a .gif file of 250x250 px. Maybe it has something to do with the fact that I also asked to set it to 250x250? It doesn't stops with all the other images, which are different sizes than 250x250..
I tested now with other images of 250x250, they have the error as well...

line 129 is
Code: Select allapp.activeDocument.saveAs( File( filename), jpegOptions, false);

Is it possible to use "save for web" instead(to reduce the storage size?)?

Thanks!!

[txuku]

Hum...

By using save for web :

Code: Select all//Resize250.jsx

startRulerUnits = app.preferences.rulerUnits;
startTypeUnits = app.preferences.typeUnits;
startDisplayDialogs = app.displayDialogs;


app.preferences.rulerUnits = Units.PIXELS
app.preferences.typeUnits = TypeUnits.PIXELS;
app.displayDialogs = DialogModes.NO;



var exportFolder = new Folder('~/Desktop/'+"OUT");
if(!exportFolder.exists) exportFolder.create();



var docRef = app.activeDocument;
var tailleRedim = 250;
var tailleRedimH = undefined;
var tailleRedimV = undefined;
var docRef1Name = docRef.name.slice(0,-4);
var jpgFile = new File( exportFolder + "/" + "250_"  + docRef1Name + ".jpg" );

var docRefH = parseInt(docRef.width);
var docRefV = parseInt(docRef.height);
var propDimH = docRefH/docRefV;
var propDimV = docRefV/docRefH;



if ( docRefH>docRefV )
{
      if ( docRefH<=tailleRedim )
      {
        tailleRedim = docRefH;
        tailleRedimH = docRefH;
        reDimension();
      }
      else
      {       
          tailleRedimH = tailleRedim;
          reDimension();
      }
}
else
{ 
      if ( docRefV<=tailleRedim )
      {
        tailleRedim = docRefV;
        tailleRedimV = docRefV;
        reDimension();
      }
      else
      {       
          tailleRedimV = tailleRedim;
          reDimension();
      }
}



function reDimension()
{
  if ( ( docRef.width == docRef.height ) && ( docRefH<=tailleRedim ) )
  {
    docRef.duplicate( docRef1Name );
    docRef1 = app.activeDocument;
    docRef.close(SaveOptions.DONOTSAVECHANGES);
    saveWebJpg(jpgFile);
  } 
   
  else
  {
    docRef.resizeImage( tailleRedimH, tailleRedimV, undefined, ResampleMethod.BICUBIC );
    docRef.selection.selectAll()
    docRef.selection.copy();
    docRef.close(SaveOptions.DONOTSAVECHANGES);
    docRef1 = app.documents.add(tailleRedim, tailleRedim, 72, docRef1Name , NewDocumentMode.RGB,      DocumentFill.WHITE,1);
    docRef1.paste();
    docRef1.flatten();
    saveWebJpg(jpgFile);
  } 
}

 



function saveWebJpg(jpgFile)
{
      var options = new ExportOptionsSaveForWeb();
      options.quality = 100;   // Start with highest quality (biggest file).
      options.format = SaveDocumentType.JPEG;   // Or it'll default to GIF.
      activeDocument.exportDocument(jpgFile, ExportType.SAVEFORWEB, options);
  activeDocument.close(SaveOptions.DONOTSAVECHANGES)
}   



app.preferences.rulerunits = startRulerUnits;
app.preferences.typeunits = startTypeUnits;
app.displayDialogs = startDisplayDialogs;

[Bob87]

I mixed it into the other code so it threats a whole folder now!

Also, I changed to PNG Thanks for the help man!

[txuku]

[Bob87]

Hi txuhu, I'll hope you still read this, otherwise I will start a new post, because it is kind of a new problem.
Is there also a way to change the image mode to RGB color in case of the original file is a .gif file? The scaling is of real bad quality when opening and resizing .gif images...

Thanks man, hope you can help me out

[txuku]

Bonjour Bob87

You can use Code: Select allactiveDocument.changeMode(ChangeMode.RGB);// passe en RGB
but the quality will not change !

[Bob87]

It actually does have another effect on the quality of the picture. Try it yourself in photoshop! Resizing an gif image to for example 150x150 will have a different look than the ones after changing to RGB color.

Anyway, thanks again massively!