Abstract: A method of operating a reducing agent injector includes determining a reference level of toxic substances exhausted from a catalytic reduction arrangement when injecting reducing agent at the pre-set mass flow rate; controlling a reducing agent injector to inject reducing agent at a first mass flow rate, the first mass flow rate being different from the pre-set mass flow rate; determining a first level of toxic substances exhausted from the catalytic reduction arrangement after injecting reducing agent at the first mass flow rate; determining which one of the reference level of toxic substances and the first level of toxic substances being a lowest level of toxic substances; updating the pre-set mass flow rate of the predefined injection model to an updated pre-set mass flow rate as the mass flow rate causing the catalytic reduction arrangement to exhaust the lowest level of toxic substances; and controlling the reducing agent injector to inject reducing agent at the updated pre-set mass flow rate.

Abstract: A method and an image processing device for detecting a portion of an image that is dominated by infrared (IR) light of at least one predetermined IR wavelength are disclosed. A set of phase pixel values for setting focus in the image is obtained. Each of the phase pixel values is compared to a first threshold related to phase shift occurring due to difference between at least a wavelength of the first colour component and said at least one predetermined IR wavelength. Moreover, in case a phase pixel value satisfies the first threshold, it is determined that the respective location associated with said phase pixel value is included in the portion of the image that is dominated by the IR light. A computer program and a computer program carrier are also disclosed.

Abstract: An image capturing device captures a first image of the scene without illuminating the scene with IR radiation. The image capturing device determines a first value of a measure relating to contrast for the first image. When the first value indicates that a first contrast of the first image less than a first threshold value, the image capturing device captures a second image of the scene while illuminating the scene with IR radiation. The image capturing device determines a second value of the measure relating to contrast for the second image. When a difference between the first contrast and a second contrast, indicated by the second value, is greater than a second threshold value, the image capturing device determines that there is fog in the scene. A computer program and a computer program carrier are also disclosed.

Abstract: An image capturing device captures a first image of the scene without illuminating the scene with IR radiation. The image capturing device determines a first value of a measure relating to contrast for the first image. When the first value indicates that a first contrast of the first image less than a first threshold value, the image capturing device captures a second image of the scene while illuminating the scene with IR radiation. The image capturing device determines a second value of the measure relating to contrast for the second image. When a difference between the first contrast and a second contrast, indicated by the second value, is greater than a second threshold value, the image capturing device determines that there is fog in the scene. A computer program and a computer program carrier are also disclosed.

Abstract: A method and an image processing device for detecting a portion of an image that is dominated by infrared (IR) light of at least one predetermined IR wavelength are disclosed. A set of phase pixel values for setting focus in the image is obtained. Each of the phase pixel values is compared to a first threshold related to phase shift occurring due to difference between at least a wavelength of the first colour component and said at least one predetermined IR wavelength. Moreover, in case a phase pixel value satisfies the first threshold, it is determined that the respective location associated with said phase pixel value is included in the portion of the image that is dominated by the IR light. A computer program and a computer program carrier are also disclosed.