A computer-implemented method of denoising one or more inspection images comprising a plurality of pixels, comprising: receiving an inspection image generated by an inspection system configured to inspect one or more containers, wherein the inspection system is configured to inspect the container by transmission, through the container, of inspection radiation (16, 22), the inspection radiation (16, 22) having an angular divergence divergent from a focal point of an inspection radiation source to an inspection radiation receiver (42, 44) comprising a plurality of detectors, the detectors being adjacent to one another to form a straight line array of detectors and being associated with the pixels in the inspection image, each detector being capable of receiving an individual angular sector of the inspection radiation (16, 22), and the inspection image is corrupted by a Poisson-Gaussian noise and a variance of the noise being non-constant in the plurality of pixels; and denoising the received inspection image by applying, to the inspection image, a variance-stabilizing transformation for transforming the variance of the noise into a constant variance in the plurality of pixels, wherein the variance-stabilizing transformation is based on a descriptor associated with the angular divergence of the individual angular sector of the inspection radiation (16, 22) and the Poisson-Gaussian noise, the descriptor being associated with each pixel of the plurality of pixels of the inspection image. receiving an inspection image generated by an inspection system configured to inspect one or more containers, wherein the inspection system is configured to inspect the container by transmission, through the container, of inspection radiation (16, 22), the inspection radiation (16, 22) having an angular divergence divergent from a focal point of an inspection radiation source to an inspection radiation receiver (42, 44) comprising a plurality of detectors, the detectors being adjacent to one another to form a straight line array of detectors and being associated with the pixels in the inspection image, each detector being capable of receiving an individual angular sector of the inspection radiation (16, 22), and the inspection image is corrupted by a Poisson-Gaussian noise and a variance of the noise being non-constant in the plurality of pixels; and the inspection system is configured to inspect the container by transmission, through the container, of inspection radiation (16, 22), the inspection radiation (16, 22) having an angular divergence divergent from a focal point of an inspection radiation source to an inspection radiation receiver (42, 44) comprising a plurality of detectors, the detectors being adjacent to one another to form a straight line array of detectors and being associated with the pixels in the inspection image, each detector being capable of receiving an individual angular sector of the inspection radiation (16, 22), and the inspection image is corrupted by a Poisson-Gaussian noise and a variance of the noise being non-constant in the plurality of pixels; and denoising the received inspection image by applying, to the inspection image, a variance-stabilizing transformation for transforming the variance of the noise into a constant variance in the plurality of pixels, wherein the variance-stabilizing transformation is based on a descriptor associated with the angular divergence of the individual angular sector of the inspection radiation (16, 22) and the Poisson-Gaussian noise, the descriptor being associated with each pixel of the plurality of pixels of the inspection image.