Showing papers by "Jumpei Tsujiuchi published in 1987"
TL;DR: A discrete Radon transform in a continuous space is discussed in order to establish an analytically exact method to synthesize projections from discretely sampled data.
Abstract: We discuss a discrete Radon transform in a continuous space in order to establish an analytically exact method to synthesize projections from discretely sampled data. The method shown is based on sampling theory and assumes that an object is band limited. Comparisons with conventional projection methods, namely, linear interpolation and pixel projection, are shown together with a computer simulation.
20 citations
TL;DR: A digital method is proposed for the restoration of images color-shifted by the object motion that makes use of phase-only matching followed by a resampling operation to compensate for a space-variant shift between different primary color images.
Abstract: Color CCD endoscopes with sequential three-color illuminations have the advantage of high spatial resolution but are sensitive to object motion. A digital method is proposed for the restoration of images color-shifted by the object motion. The method makes use of phase-only matching followed by a resampling operation to compensate for a space-variant shift between different primary color images. Restored images are suitable for further image processing such as color emphasis and structure enhancement.
9 citations
TL;DR: An optical filtering system with a white light illumination is shown to be very effective for the preprocessing of endoscopic color images and experimental results show the advantage of an optical system against a digital method.
1 citations
TL;DR: In this article, an experiment for recording and retrieving two-dimensional colour images is described, which utilizes thermoplastic photoconductor material and a simple setup comprising an imaging lens with dual apertures.
1 citations