HELP NEEDED!! batching, overlaying, background cut out

Question

Hi All,
very new to this.
I have 2500+ images (caracitures of cars on white backgrounds). I need to place ALL of them on to  a BLACK tee shirt image for internet listing.
So, how do I do this automated?
make the thing background BLACK
overlay image on the teeshirt
save it in the order they are done
2500+ times
I use Photoshop 7.0

Answer 1

Adobe has made many changes in Photoshop scripting support since PS7 scripting add on. You may be best off with a two pass process.  The first one being a batch process that process your PDF file where you object have pure white backgrounds.  If the magic wand works well to select your white background you may be able to convert the background layer to a normal layer and then delete the white continuous area. Once deleted the background will be transparent, you should see a checker board area. Save a set of cutout object PNG files. That may be possible to do by batching an action. I have never processes PDF files using Automat Batch.  You may need a batch script where you can select just PDF files in a folder and open then the way then need to be opened.  The way I read your description your PDF files are singel image paged file.
Anyway if you can created a set of cutout object png files it should be possible then to create your tea shirt image files.  I had problems resizing images for an area in CS2 for there either was no selection bounds operation was available or there was a bug in Adobe scripting code.  I resize images to fit area all the time in my Photo collage toolkit scripts. However I not to sure how I do it would work well with png files that have large border transparent so before saving any png file trin the images transparent area first. So that the png file bounds and the objects bounds are the same.    My code works in CS2, CS3, CS4 CS5 and CS6 though there is a bug in CS6 that can bite.  PS7 and CS scripting support may be a bit different. I use Alpha channel selection to map images locations and use the bounds of the selection to know what to resize to taking into account the aspect ratio of the object and the aspect ration of the area.
Here is the main code I use.  Remember there a problem in scripting support prior to CS3 that I had to use my friend Rube Goldberg's sledge hammer to pound script into submission.   I place in full size images  the resize these to fit the area and mask off excess. My finctions code are not shown here.  Other ways are also posible. For example my paste image roll script use copy and paste where the image file is first flattened are resized for the location before the copy. The flatten would color in a png file transparent area don't flatten http://www.mouseprints.net/old/dpr/PasteImageRoll.jsx
Code
if (fileList[i] instanceof File) {
                                                   var layers = activeDocument.layers;
                                                  activeDocument.activeLayer = layers[layers.length-1-imageNumber+1];           // Target Background Layer or last placed image
                                                  placeImage(fileList[i]);                                                     // Place in full 100% size Image
                                                  // resize smart object layer to just cover canvas area aspect ratio and size
                                                  // Get Smart Object current width and height
                                                  var LB = activeDocument.activeLayer.bounds;
                                                  var LWidth = (LB[2].value) - (LB[0].value);
                                                  var LHeight = (LB[3].value) - (LB[1].value);
// sledge hammer
                                                  // Get Alpha Channel's width and height Selection Bounds did not work???
                                                  makeLayer();                                                            // Make Temp Work Layer
                                                  loadAlpha("Image " + imageNumber );                              // Load Image Alpha Channel
                                                  fillBlack();
                                                  activeDocument.selection.invert();                              // Inverse
                                                  // If image size equals canvas size no pixels neill be selected clear will fail
                                                  try{
                                                            activeDocument.selection.clear();                    // One clear did not work
                                                            activeDocument.selection.clear();                    // Two did the trick
                                                  }catch(e){}
                                                  activeDocument.selection.deselect();                              // Deselect
                                                  var SB = activeDocument.activeLayer.bounds;                    // Get the bounds of the work layer
                                                  var SWidth = (SB[2].value) - (SB[0].value);                    // Area width
                                                  var SHeight = (SB[3].value) - (SB[1].value);                    // Area height
                                                  activeDocument.activeLayer.remove();                              // Remove Work layer
  //end hammer to get the area bounds
// the following line will produce an internal error in CS6 if Photoshop's user interpolation prefence is Adobe cs6 default Bicubic Automatic.
                                                  var userResampleMethod = app.preferences.interpolation;          // Save interpolation settings
                                                  app.preferences.interpolation = ResampleMethod.BICUBIC;          // resample interpolation bicubic
                                                  if (LWidth/LHeight<SWidth/SHeight) { // Smart Object layer Aspect Ratio less then Canvas area Aspect Ratio
                                                            var percentageChange = ((SWidth/LWidth)*100);  // Resize to canvas area width
                                                            activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLE CENTER);
                                                  else {
                                                            var percentageChange = ((SHeight/LHeight)*100); // resize to canvas area height
                                                            activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLE CENTER);
                                                  app.preferences.interpolation = userResampleMethod;          // Reset interpolation setting
                                                  // Load Alpha Channel as a selection and align image to it
                                                  loadAlpha("Image " + imageNumber);
                                                  align('AdCV');
                                                  align('AdCH');
                                                  // Add Layer mask using Alpha channel Image area map
                                                  layerMask();                                                                      // Add un linked Layer Mask
                                                  // Add Photo Collage Layer Style to image layer
                                                  addStyle(imageStyle);