Joseph J. Capowski

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Most contemporary neuron tracing systems are semi-automatic; that is, an operator follows neuron branches in a microscope or on a data tablet and instructs a computer when to record a spatial sample. A list of such samples is then used to generate a display of the neuron and to summarize statistically its structure. The tracing is tedious, and the operator(More)
A system of programs for building three-dimensional models of biological structures was developed. Outlines of features such as cells, tissue edges, and neuron pathways are traced into a computer from tissue sections mounted on a light microscope or projected onto a data tablet. The three-dimensional models are built from a series of the two-dimensional(More)
The Neuroscience Display Processor (NDP) has been developed at the University of North Carolina for displaying two- and three-dimensional structures, and two-dimensional graphs. To make easy the displaying of graphs and other drawings on a refresh CRT or on a digital plotter, a subroutine package has been produced for the scientist programming in FORTRAN.(More)
Computer graphics displays in the neurosciences are classified into three categories: anatomical structures, physiological waveforms, and statistical summaries. The capabilities required in a line drawing system to present neuroscience displays are smooth rotation and translation of 3D structures, simple line rejection, orthographic projection, and flexible(More)
The spinal cords of adult cats were impregnated using the Golgi-Kopsch technique and cut in the sagittal plane. Richly arborizing axon-trees were found in the substantia gelatinosa (lamina II of Rexed). Axon arborizations, characterized by a long rostro-caudal course, a single-stem fiber, multiple-arborizing side branches and large terminal and en passant(More)
A PDP-11/34 laboratory computer, a Quantimet image analyzer, and a research light microscope with motorized X, Y stage and focus axis are used for "semi-automatic" neuron reconstruction. The operator examines each neuron tree through the microscope eyepieces, commands the Quantimet system to move the stage and focus the optics, and when a point along the(More)