Thursday, April 30, 2009

Got it. Vector sum

The sidewall movement can be seen the vector sum of the horizontal and vertical movement.
But it's still not directly depicted by the width and depth change, e.g. pure lateral modulation has constant width.

Still don't understand the width/depth based stereo decoding

As far as I know, if the stereo cutter moves only vertically to produce out-of-phase signal,
the linear combination of (W+H) or (W-H) won't be able to give an out-of-phase signal.

To my knowledge, only the displacement of sidewall can explain this case.

Am I missing something?

Tuesday, April 28, 2009

Question to ask ich

1. Review of old work
  • Optics: explaining the terms? Optical flow?
  • Hardware: resolution, photos? illuminations
  • Software: preprocessing, groove extraction, which part of groove is undulation.
  • Common approach: RIAA EQ.
  • Error introduced: Stotzer's blur
  • Result: data amount, time cost
  • Quality
  • Fundamental difference with our approach
2. My workflow
  • Optics: WLI
  • Hardware:
  • Software: alignment, polar/tertiary, preprocessing (detach/reattach), unwrapping, center correction, stereo.
  • Common: edge detection, RIAA
  • unique
  • Error introduced: warp, center offset
  • Result:
  • Quality
3. Result

Saturday, April 11, 2009

Final Mission: Scanning

Goal
  • In 3-4 weeks, we need to scan ALL DATA WE NEED for DISSERTAION
Definitions:
  • DATA
    • OPD's
    • Vision GUI screenshots: to present the software, its functionality, and certain post-processing results.
    • ASCII's to show different datasets (Veeco forbidden?)
    • Congifuration
    • Photos of the microscope
  • WE NEED
    • Image evidence of theories
    • Image as illustration of concepts, tools, and processes
  • DISSERTATION
    • Narratives of the whole MItAC project
    • Theories of optics.
    • Microscope
    • Groove image model
    • Scanning process
      • effective, ineffective scanning configuration
    • Image processing
    • Result analysis
Data needed
  1. More audible OPD grids (3 datasets at most)
    1. Jazz
    2. Percussion
    3. Speech
  2. LP opd, 78 opd
  3. Screenshots of Vision
    1. A scan-in-motion panorama, including the intensity window and progress bar
    2. Intensity window, with and without fringes
    3. Stage, Stage grid dialogs, with meaningful content for illustration of process
    4. Configuration dialog and every tab/pane in it
    5. Analysis views
    6. Screenshots of Vision result analysis, e.g. top view, cross-section view, 3D view...
  4. Photo of microscope
    1. Calibration model
    2. Microscope
  5. ASCII files
  6. Example OPDs
    1. from different VSI speeds
    2. from different tilt
    3. from 50X, 5X, 10X, 25X
    4. from different illuminations (intensities), e.g., saturation, insufficient light
    5. from ramp intensity
    6. from incorrect backscan/depth (loss of bottom/top)
    7. from different modulation thresholds (noise level)
    8. Vision auto-stitching alignment failures