1 ) A method for gas visualization in an infrared (IR) image depicting a scene, the method comprising: capturing a first IR image depicting the scene at a first time instance and a second IR image depicting the scene at a second time instance; performing image processing operations on image data derived from said first IR image and from said second IR image, to generate a collection of data representing the location of gas in one of the first or second IR image; and generating a third image by adjusting pixel values in an image depicting the scene, dependent on pixel values of said collection of data.