Is it possible to remove background in InDesign only?

Hi @pierret18811376 

Image processing is the way to go, but here you might fake it using SCREEN blending mode on a BLACK background.

Simple demo script:

(function(  orig, dup,g)
//----------------------------------
// Assuming a simple image container is selected on the page.
{
   // 1. Basic enhancer.
   (orig=app.selection[0]).properties =
   {
      strokeColor: "Black",
      transparencySettings: {blendingSettings:{blendMode:+BlendMode.SCREEN}},
   };
   with( dup=orig.duplicate() )
   {
      graphics.everyItem().remove();
      fillColor = "Black";
      sendToBack();
   }
   
   // 2. Increase the B/W contrast if needed.
   g = orig.parent.groups.add([orig,dup]);
   (dup=g.duplicate()).properties =
   {
      transparencySettings: {blendingSettings:{blendMode:+BlendMode.COLOR_BURN}},
   };
})();

Result:

Best,

Marc

EDIT: Sorry for my intervention: I thought we were in the Scripting branch of the forum! Others have answered the substance of the question before me. My mistake.