A method for gas visualization in an infrared 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; - generating a collection of data representing the location of gas in one of the first or second IR image by performing image processing operations on image data derived from said first IR image and from said second IR image, wherein the image processing operations to generate a collection of data representing the location of gas comprises: • generating a temporal difference image based on the first IR image and the second IR image; • performing edge detection in at least one of the first and the second IR image to provide detected edge information; • creating an edge map comprising the detected edge information; and • generating a processed difference image by combining the edge map with the temporal difference image such that the detected edge information is removed; and • detecting gas within the scene by detecting gas representing pixels in the first or second IR image based on said processed difference image to create a gas map comprising the detected gas information in the form of a binary gas image; characterized in: - that in creating an edge map comprising the detected edge information, the pixels representing detected edge information are assigned a first pixel value and the remaining pixels are assigned a second pixel value; and - that the method further comprises combining the gas map with the processed difference image such that pixels corresponding to the pixels that have been identified as representing gas information in the gas map are assigned the pixel values of the corresponding pixels in the processed difference image, to generate an intermediate gas image and generating a gas visualization image by combining the intermediate gas image with the image depicting the scene, such that the gas representing pixels are distinguishable. - 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; - generating a collection of data representing the location of gas in one of the first or second IR image by performing image processing operations on image data derived from said first IR image and from said second IR image, wherein the image processing operations to generate a collection of data representing the location of gas comprises: • generating a temporal difference image based on the first IR image and the second IR image; • performing edge detection in at least one of the first and the second IR image to provide detected edge information; • creating an edge map comprising the detected edge information; and • generating a processed difference image by combining the edge map with the temporal difference image such that the detected edge information is removed; and • detecting gas within the scene by detecting gas representing pixels in the first or second IR image based on said processed difference image to create a gas map comprising the detected gas information in the form of a binary gas image; • generating a temporal difference image based on the first IR image and the second IR image; • performing edge detection in at least one of the first and the second IR image to provide detected edge information; • creating an edge map comprising the detected edge information; and • generating a processed difference image by combining the edge map with the temporal difference image such that the detected edge information is removed; and • detecting gas within the scene by detecting gas representing pixels in the first or second IR image based on said processed difference image to create a gas map comprising the detected gas information in the form of a binary gas image; - that in creating an edge map comprising the detected edge information, the pixels representing detected edge information are assigned a first pixel value and the remaining pixels are assigned a second pixel value; and - that the method further comprises combining the gas map with the processed difference image such that pixels corresponding to the pixels that have been identified as representing gas information in the gas map are assigned the pixel values of the corresponding pixels in the processed difference image, to generate an intermediate gas image and generating a gas visualization image by combining the intermediate gas image with the image depicting the scene, such that the gas representing pixels are distinguishable.