Abstract: A method is provided of determining an image recording device characterisation for a target image. A number of component spectra are determined from a set of target spectra obtained from the target image such that the spectra can be represented by combinations of one or more of the component spectra. A perceptual colour space data set is defined and combinations of the component spectra which correspond to the perceptual colour space data set are determined. A device data set is generated in accordance with the determined combinations and a device spectra response, the device data set representing a set of colours which can be generated by an image recording device having the device spectral response. A characterisation is then determined by reference to the relationship between the device and perceptual colour space data sets.

Abstract: A digital camera has a photosensitive detector assembly comprising at least two semiconductor, photosensitive detector arrays. An optical guide assembly guides light rays defining an image of an object onto the detector arrays such that different areas of the image are detected by respective arrays and such that the areas are abutting or overlapping.

Abstract: A digital imaging device has a CCD array fixed to a housing. A focussing lens is mounted via a mounting assembly to the housing to focus an image onto the detector array. The mounting assembly is operable to move the lens relative to the housing and detector array whereby the image can be displaced relative to the detector array.

Abstract: A method of generating data representing an input profile defining a relationship between input color data generated by an input device and modified in accordance with a predetermined algorithm, and corresponding device independent data. The method comprises: a) operating the input device on a range of predetermined input colors to generate said input color data; b) processing said input color data in accordance with the predetermined algorithm to generate output data suitable for operating an output device; c) converting said output data to said device independent data; and, d) generating said input profile data such that application of said input profile to said input color data substantially generates said device independent data.

Abstract: A method of generating a bitmap representative of an original image. The method comprises (1) scanning the original image to generate a greyscale pixel map; (2) interpolating and rotating the greyscale pixel map to generate a higher resolution greyscale pixel map; and (3) converting the higher resolution greyscale pixel map into the bitmap. The greyscale pixel map is converted into the bitmap by (I) ranking each greyscale pixel value against the greyscale pixel values of a neighborhood of adjacent pixel locations; (ii) determining a desired number of black binary pixels (B_Pc) in the neighborhood; (iii) comparing the rank of the greyscale pixel with the desired number of black binary pixels; and (iv) assigning a black binary pixel value to the pixel location when the comparison carried out in step (iii) satisfies a predetermined condition.

Abstract: Image viewing apparatus comprises a transparent platen on which an image to be scanned can be positioned. A scanning system support is movable alongside the platen. A light source illuminates the platen from the same side as the scanning system support. A light diffuser can be moved between a first position in which it is located between the light source and the platen whereby light from the light source is diffused across the platen, and a second position in which the light diffuser is positioned so as not to impede a scanning system on the support from viewing an image on the platen.

Abstract: A method and apparatus for generating a digital representation of an image. The apparatus includes a scanning device for scanning the image to generate digital data defining the colour content of pixels of the image. An input profile generator is provided for generating an input profile defining the NTF of the scanning device.

Abstract: Radiation beam scanning apparatus comprises a rotatable reflector for causing an incident radiation beam to undergo a scanning movement; and a compensating device on to which the radiation beam impinges before reaching the rotating reflector. The compensating device modifies the optical path of circumferentially spaced portions of the beam upstream of the reflector, in phase with the rotation of the reflector, so as to compensate for distortions in the reflected beam introduced by the reflector.