Slicing a very image (24k px x 34k px) into smaller crops

Modertator, add Actions and Scripting label to this thread.

// split image into x times y segments and save them as jpgs;

// 2017, use it at your own risk;

#target photoshop

if (app.documents.length > 0) {

var originalUnits = app.preferences.rulerUnits;

app.preferences.rulerUnits = Units.PIXELS;

// document;

var myDocument = app.activeDocument;

var theName= myDocument.name.match(/(.*)\.[^\.]+$/)[1];

var thePath = myDocument.path;

var theCopy = myDocument.duplicate("copy", true);

// the numbers;

var theX = 9;

var theY = 13;

var xFrac = myDocument.width/theX;

var yFrac = myDocument.height/theY;

// psd options;

psdOpts = new PhotoshopSaveOptions();

psdOpts.embedColorProfile = true;

psdOpts.alphaChannels = true;

psdOpts.layers = true;

psdOpts.spotColors = true;

// jpg options;

var jpegOptions = new JPEGSaveOptions();

jpegOptions.quality = 9;

jpegOptions.embedColorProfile = true;

jpegOptions.matte = MatteType.NONE;

// create folder;

var folderName = thePath+"/"+theName+"_"+theX+"x"+theY;

if (Folder(folderName).exists == false) {Folder(folderName).create()};

//save jpgs;

for (var n = 1; n <= theY; n++) {

for (var m = 1; m <= theX; m++) {

cropTo((m-1)*xFrac, (n-1)*yFrac, m*xFrac, n*yFrac);

var theNewName = theName+"_"+bufferNumberWithZeros(m, 3)+"_"+bufferNumberWithZeros(n, 3);

theCopy.saveAs((new File(folderName+"/"+"_"+theNewName+".jpg")),jpegOptions,true);

theCopy.activeHistoryState = theCopy.historyStates[0];

//executeAction( charIDToTypeID("undo"), undefined, DialogModes.NO );

}

};

theCopy.close(SaveOptions.DONOTSAVECHANGES);

// reset;

app.preferences.rulerUnits = originalUnits;

};

////// buffer number with zeros //////

function bufferNumberWithZeros (number, places) {

var theNumberString = String(number);

for (var o = 0; o < (places - String(number).length); o++) {

theNumberString = String("0" + theNumberString)

};

return theNumberString

};

////// crop //////

function cropTo (x1, y1, x2, y2) {

// =======================================================

    var desc7 = new ActionDescriptor();

        var desc8 = new ActionDescriptor();

        var idPxl = charIDToTypeID( "#Pxl" );

        desc8.putUnitDouble( charIDToTypeID( "Top " ), idPxl, y1 );

        desc8.putUnitDouble( charIDToTypeID( "Left" ), idPxl, x1);

        desc8.putUnitDouble( charIDToTypeID( "Btom" ), idPxl, y2 );

        desc8.putUnitDouble( charIDToTypeID( "Rght" ), idPxl, x2 );

    var idRctn = charIDToTypeID( "Rctn" );

    desc7.putObject( charIDToTypeID( "T   " ), idRctn, desc8 );

    desc7.putUnitDouble( charIDToTypeID( "Angl" ), charIDToTypeID( "#Ang" ), 0.000000 );

    desc7.putBoolean( charIDToTypeID( "Dlt " ), false );

    desc7.putEnumerated( stringIDToTypeID( "cropAspectRatioModeKey" ), stringIDToTypeID( "cropAspectRatioModeClass" ), stringIDToTypeID( "pureAspectRatio" ) );

    desc7.putBoolean( charIDToTypeID( "CnsP" ), false );

executeAction( charIDToTypeID( "Crop" ), desc7, DialogModes.NO );

};

The sample below consists of 99 (9x11) squares but a 9x13 grid (total 117) in your dimensions would handled in a similar fashion:

Guides dragged out from the top and side rulers. View > Snap to Guides. Rectangular Marquee tool. Separate layer for each fragment,

The sample below shows some of the images in the grid. Added the final image, with the original image ghosted, for clarity.

Hello, how do you intend to print? Some printers can tile automatically a large image on several pages...

Any ideas?

Scripting. But please provide an exact and specific explanations including the pixel dimensions, overlap needs, …

Photoshop Scripting