Imaging apparatus for improving discrimination between parts of a scene, wherein the imaging apparatus comprises: at least one camera arranged to capture a first image from the scene at a first region of wavelengths, corresponding to a first waveband, and a second image from the scene at a second region of wavelengths, corresponding to a second distinct waveband; an image processing unit for processing the images so captured; and a visual display unit, wherein: the visual display unit is configured to display an image of the scene; the imaging apparatus is so arranged that the images detected by the at least one camera include polarimetric information that can be extracted by the image processing unit; and the image processing unit is arranged to extract polarimetric information from both the first and second images, the polarimetric information comprising a plurality of polarimetric parameters, and to display, on the visual display unit, a graphical representation of the results of a comparison between a polarisation parameter for parts of the first image with an equivalent polarisation parameter for corresponding parts of the second image, so as to provide better discrimination in the graphical representation between parts of the scene, wherein the comparison is performed either by calculating a ratio or a difference between the polarisation parameters, and wherein the apparatus includes a user interface via which the user can select which of the polarimetric parameters are to be used for the graphical representation of the results of the comparison of the polarimetric information from the first and second images. wherein the imaging apparatus comprises: at least one camera arranged to capture a first image from the scene at a first region of wavelengths, corresponding to a first waveband, and a second image from the scene at a second region of wavelengths, corresponding to a second distinct waveband; an image processing unit for processing the images so captured; and a visual display unit, at least one camera arranged to capture a first image from the scene at a first region of wavelengths, corresponding to a first waveband, and a second image from the scene at a second region of wavelengths, corresponding to a second distinct waveband; an image processing unit for processing the images so captured; and a visual display unit, wherein: the visual display unit is configured to display an image of the scene; the imaging apparatus is so arranged that the images detected by the at least one camera include polarimetric information that can be extracted by the image processing unit; and the image processing unit is arranged to extract polarimetric information from both the first and second images, the polarimetric information comprising a plurality of polarimetric parameters, and to display, on the visual display unit, a graphical representation of the results of a comparison between a polarisation parameter for parts of the first image with an equivalent polarisation parameter for corresponding parts of the second image, so as to provide better discrimination in the graphical representation between parts of the scene, wherein the comparison is performed either by calculating a ratio or a difference between the polarisation parameters, and wherein the apparatus includes a user interface via which the user can select which of the polarimetric parameters are to be used for the graphical representation of the results of the comparison of the polarimetric information from the first and second images. the visual display unit is configured to display an image of the scene; the imaging apparatus is so arranged that the images detected by the at least one camera include polarimetric information that can be extracted by the image processing unit; and the image processing unit is arranged to extract polarimetric information from both the first and second images, the polarimetric information comprising a plurality of polarimetric parameters, and to display, on the visual display unit, a graphical representation of the results of a comparison between a polarisation parameter for parts of the first image with an equivalent polarisation parameter for corresponding parts of the second image, so as to provide better discrimination in the graphical representation between parts of the scene, wherein the comparison is performed either by calculating a ratio or a difference between the polarisation parameters, and wherein the apparatus includes a user interface via which the user can select which of the polarimetric parameters are to be used for the graphical representation of the results of the comparison of the polarimetric information from the first and second images.