Abstract: A motion analysis system analyzing a prescribed motion performed by a person using a prescribed tool, with a prescribed portion of the person or portion of the tool in the motion being taken as a measurement portion, a predictive model generated by learning based on learning data including an image frame of a motion video, wherein the person performing the motion, and an inter-frame differential frame indicating a difference in pixel values between frames of each pixel of the image and an adjacent frames, which is adjacent to the image frame, in the motion video; generates an inter-frame differential frame of a given analysis object video; and predicts by using the predictive model a position of the measurement portion in an image frame of the analysis object video on the basis of the image frame of the analysis object video and the inter-frame differential frame of the analysis object video.

Abstract: A motion analysis system analyzing a prescribed motion performed by a person using a prescribed tool, with a prescribed portion of the person or portion of the tool in the motion being taken as a measurement portion, a predictive model generated by learning based on learning data including an image frame of a motion video, wherein the person performing the motion, and an inter-frame differential frame indicating a difference in pixel values between frames of each pixel of the image and an adjacent frames, which is adjacent to the image frame, in the motion video; generates an inter-frame differential frame of a given analysis object video; and predicts by using the predictive model a position of the measurement portion in an image frame of the analysis object video on the basis of the image frame of the analysis object video and the inter-frame differential frame of the analysis object video.

Abstract: A cable including two metal conductor wires, and a coating that is made of a transparent material or a translucent material, covers the two metal conductor wires in a state of being arranged in parallel at an interval, and is shaped in a manner that one of two surfaces existing along a direction substantially parallel to a direction between the two metal conductor wires is a plane and the other surface is a curved surface with a convex cross section.

Abstract: There is provided a cable including two metal conductor wires, and a coating that is made of a transparent material or a translucent material, covers the two metal conductor wires in a state of being arranged in parallel at an interval, and is shaped in a manner that one of two surfaces existing along a direction substantially parallel to a direction between the two metal conductor wires is a plane and the other surface is a curved surface with a convex cross section.

Abstract: A copying lens system of three lenses is provided in which the total length is less than 0.15f with aberration fully corrected. This is brought about by a three-lens system in which the first lens is a positive meniscus whose convex surface faces the object side, a negative second lens with a concave surface at both ends, and a positive third lens with a convex surface at both ends, the rear surface being a reflection surface. The dimension of the lenses must satisfy the following condition:5f<.vertline.r.sub.6 .vertline.<8fand0.5f<r.sub.2 <2fwherein f represents the composite focal length of the total system, r.sub.2 represents the radius of curvature of the surface of the lens that stands second from the object side, and r.sub.6 represents the radius of curvature of the surface of the lens that stands sixth from the object side.

Abstract: Six groups of six lens elements for use in the photographic arts include a front lens group of three groups of three lens elements, and a back lens group of three groups of three lens elements. The front and back lens groups are symmetrically arranged on either side of a diaphragm mounted therebetween. The whole objective is extremely small in size and has little variation in distortion aberration caused by variation in magnification. In addition, both the image field of curvature and the coma aberration are sufficiently corrected for field angles up to 70.degree. or so under unitary magnification.