This paper proposes a restoration method in quantization for the image with the reduced gray scale value. Since the vision systems are likely to capture images with insufficient contrast or with the reduced number of gray levels, some theoretical countermeasure must be introduced. From this reason, OKQT (Oteru-Koshimizu's Quantization Theory) was introduced for providing the minimum quantization levels by which we can completely restore the full quantization levels of the histogram, or by which we can generate the super resolution in gray level. If no countermeasures are prepared, for example, the full potential of the display system cannot be utilized and furthermore the sufficient information in the gray value histogram cannot be provided for the sufficient performance of the image processing. This paper proposes an image restoration method in quantization guided by the histogram restoration. In this method, the histogram with sparse frequency is interpolates by using Sinc function, and we obtain the restored image by converting the gray scale values guided by the interpolated histogram.

View full abstract

In assembling for miniature mechanism, there is the case that residual vibration influences positioning. With the very thin parts such as the optical fiber, residual vibration occurs in the assembly part that stiffness is low. Therefore vibration control and positioning of the assembly part which is thin and low stiffness is necessary. Vibration control is mainly used as feed-forward control. However, when the amount of positioning is unknown at first, like a minute assembly under the microscope, feed-forward control cannot be used. In this case, after a work moves to the sight, the speed of work must be controlled. Our system can position it and control the vibration suppression of the work which moves from the out of sight. We used a control vibration method to add a speed pattern to. This report describes an experiment by the new vibration control method and comparison with the vibration control method by the conventional feed-forward.

View full abstract

Wood grain patterns are used as a design element of artificial things because they give impressions such as “peacefulness” and “composure”. Although fundamental utilization of wood grain patterns is to process natural material as a product, it is not advantageous in respect of cost. In order to easily and cheaply use wood grain patterns, printing technique is then adopted. However, there is a problem that it is difficult to design wood grain patterns with impressions of customer's demands. In this research, in order to generate/design wood grain patterns according to a customer's demands, a design method of the wood grain patterns with required impressions is proposed. A basic system based on the proposal method was developed, and the usefulness is verified by evaluation experiments.

View full abstract

Micro-fabrication with diamond cutting has been developed for machining optoelectronic components such as a diffraction grating, and MEMS components such as μ-TAS. In these components, highly accurate micromachining of submicron order has been realized. However there has been no report with regard to producing 10-nm order depth grooves by the diamond cutting. This paper describes a novel diamond cutting method which enables producing highly accurate 10-nm order depth grooves. In this method, a mirror finished glass substrate, sputter coated with thin soft metal films is used as a workpiece. The workpiece is pressed by a diamond cutting tool at a constant vertical load, while the diamond cutting tool is being moved. By using the glass substrate as a stopper layer, which is not cut by the diamond cutting tool, grooves with the same depth as the thin soft metal films thickness can be fabricated. It was experimentally confirmed that, with the proposed cutting method, a very highly accurate uniform groove, 1.0μm wide and 80nm deep, could be achieved.

View full abstract