adobe - InDesign CS5 / Script: Can I convert TIFF and PNG images to `black and white`? -

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i have script scans document image types, converts them black , white, , exports black , white images new folder.

seems if indesign export these image file-formats:  jpeg, tiff, , png (it not export gif files).

however, seems indesign doesn't have colorspace.gray or colorspaceenum.gray properties tiff , png files (it does have property jpeg files, though).

  • so, there way convert tiff , png files black , white in indesign's extendscript?

  • if there not, reasoning not providing black , white conversion these file types?


here code, of exports black , white jpeg files: 

var document = app.activedocument; var newfolder = createfolder(document); // if subdirectory dne, create folder function below  saveallimages(document, newfolder); // function below    function createfolder(doc) {     try     {       /*          * type-casting filepath property (of type object) string type;          * must string type concatenate subdirectory variable (also of type string)          */         var docpath = string(doc.filepath);         var subdirectory = "/black , white images";     }     catch(e)     {         alert(e.message);         exit();     }      var imagesfolder = docpath + subdirectory; // concatenating 2 variables     if(!folder(imagesfolder).exists)     {         folder(imagesfolder).create();     }      return imagesfolder; // instantiation outside of function  } // end of function createfolder    function saveallimages(doc, folder) {     var imgs = doc.allgraphics;     var filename = "";     var img = "";     var imgtype = "";      for(var = 0; < imgs.length; i++)     {         if(imgs[i].itemlink != null)         {             filename = imgs[i].itemlink.name;             img = new file(folder + "/" + filename); // each image instantiated here             imgtype = imgs[i].imagetypename; // image type determined here (.tif, .jpg, .png, etc..)              alert("this " + imgtype + " file.");              /*                 * array image options, instantiated function below;                 * options[0] "maximum" image quality property, &                 * options[1] "gray" image conversion property;                 */             var options = converttoblackandwhite(imgtype);              // each image exported new folder here, file type             switch(imgtype)             {                 case "gif":                     alert("this script cannot convert , export gif file:\n\t" + filename + " !");                     break;                  case "tiff":              case "eps":                  case "jpg":                     options[0]; // maximum image quality                     options[1]; // black & white conversion                      imgs[i].exportfile(exportformat.jpg, img, false);                     break;                  case "png":                     options[0]; // maximum image quality                     options[1]; // black & white conversion                      imgs[i].exportfile(exportformat.png_type, img, false);                     break;                  default:                     alert("\tunlisted image type: " + imgtype + "!\nadd type switch statement.");                     break;             } // end of switch statement          } // end of if statement     } // end of loop  } // end of function saveallimages            function converttoblackandwhite(filetype)         {             // array image-quality , color-conversion values             var settings = [];              // each image exported new folder here, file type             switch(filetype)             {                 case "tiff":                  case "png":              case "eps":                  case "jpg":                     settings[0] = "app.jpegexportpreferences.jpegquality = jpegoptionsquality.maximum"; // maximum image quality                     settings[1] = "app.jpegexportpreferences.jpegcolorspace = jpegcolorspaceenum.gray"; // black & white conversion                     break;                  default:                     break;              } // end of switch statement              return settings; // instantiation outside of function          } // end of function converttoblackandwhite

so, there way convert tiff , png files black , white in indesign's extendscript?

not aware of.

if there not, reasoning not providing black , white conversion these file types?

he god knows :d

given expectations, rather delegate these image operations photoshop can use formats want, settings want. can either use bridgetalk object or have hotfolder run ps ( applescript ex ). or use doscript call applescript or visualbasic depending on os , have them run conversion tool might have.

good luck.

loic

ps: see tool also. maybe has api can call js http://www.rorohiko.com/wordpress/indesign-downloads/color2gray/


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