Business Cases

• High-resolution film scanner control system - development

  This system controls a high-resolution film scanner capable of scanning large format film of aerial photographs with a resolution of up to 6.2 μm and converting it into digital data.

  The high-resolution film scanner consists of a table driven by the XY axis and a line sensor mounted on the table. Since large format film is approximately four times wider than the line sensor can capture, the entire film cannot be converted to digital data in a single scan. Therefore, this system scans the entire film in four areas, aligns each area, and combines them into a single image. If alignment lines are noticeable due to the limitations of the drive system's accuracy, they are corrected by image processing.

  To increase the scanning speed per film, this system utilizes multi-core CPUs for parallel processing.

  

  Technologies

  • Line Sensor
  • Serial Communication
  • Motor Control
  • Image Processing
  • Parallel Processing
  • CameraLink
  • C++/CLI
  • C#

• Independent component analysis - technical survey and tutorial

  We made a survey of various methods of Independent Component Analysis, summarized mathematical theories to understand these theories, submitted as a report document, and tutorial based on the report.

  Mainly surveyed the following methods:

  • Negentropy Minimizing Method (FastICA)
  • Cumulant Tensor Eigen Decomposition Method (JADE)
  • Non-Normal Component Extraction by Projection Pursuit
  • Beta-Divergence Minimizing Method
  • Space Mixture Separation utilizing Time Structures.
  • Mutual Covariance Elimination (Simultaneous Diagonalization of Self-Covariance Matrix by Eigenvalue Decomposition)
  • Mutual Decorrelation Method (Simultaneous Diagonalization of Nonstationary Covariance Matrix by Gradient Method)
  • Variance-Nonstationarity Maximizing Method.

  Summarized the following mathematical theories:

  • Information Theory
  • Mutual Information
  • Kullback-Leibler Information
  • Principal Component Analysis
  • Factor Analysis
  • Canonical Correlation Analysis
  • Nonlinear PCA
  • Kernel PCA
  • Cumulant Decomposition
  • Maximum Likelihood Method
  • Pseudo Maximum Likelihood Method
  • Negentropy
  • Gram-Charlier Expansion
  • Gauss-Hermite Expansion
  • Edgeworth Expansion
  • Cornish-Fisher Expansion
  • Beta-Divergence
  • B-Robustness
  • Projection Pursuit
  • Kernel Dimension Reduction
  • Marcinkiewicz's Theorem
  • Maximum Entropy Method
  • Nonlinear Optimization
  • Eigenvalue / Singular Value Decomposition
  • Symmetrical Diagonalization of Matrix, and numerical calculation methods of these theories

• Ca2+ imaging data processing program - development

  We developed a program that directly inputs the binary output data from the Ca2+ imaging device into the program and performs processes such as calcium indicator bleaching correction, noise filtering using a digital filter, calculation of relative light intensity change, and spatial noise filtering using a Gaussian filter and a median filter.

  The processed image data was output in the same format as the Ca2+ imaging device output, allowing the use of the functions of the software that comes with the Ca2+ imaging device.

  

  Technologies

  • Bleaching Correction
  • FIR Filter
  • DF/F Calculation
  • Gaussian Filter
  • Median Filter
  • C

See more cases