Category: Diary

Monday 07/24

Finish user study survey.

Tuesday 07/25

Revised user study.

Try interpolation

Wednesday 07.26

Finish interpolation, try to debug the strange lines (failed)

Thursday 07/27

Solve the bug 306 & 400 for vive by:

• disconnect the usb, hdmi and power.
• steamVR->Settings -> disconnect all usb devices
• Reboot the laptop
• steamVR->Settings -> enable direct mode
• connect the usb, hdmi and power.

Go to GLAO and ask about the parking ticket.

Try TAA with variance sampling to solve the flickers.

Research:

• Transfer the ray-marching scene to Unity.
• Build a GLSL to HLSL correspondance mapping

Leetcode:

• 220. Contains Duplicate III
• 219. Contains Duplicate II
• 217. Contains Duplicate
• 300. Longest Increasing Subsequence

Pipeline:

Implemented after geometry pass and before actual shading

Build visual perception model:

Derive per-pixel sample probability map P that assigns a single perceptual importance value in [0,1] for each feature.

Features

• Acuity
  • Build a eccentricity fall-off model which is valid for more than 30degree.
  • Revise the model based on eye motion (the fovea becomes a line)
  • Should read Dropbox\OPENGL\papers\VISUAL SENSORY UNITS AND THE MINIMUM ANGLE OF RESOLUTION
• Attention
  • Texture adaption:
    • just use mipmap: remove high frequency to avoid aliasing
  • 3 perceptual filters:
    • Object Saliency Detection: Fo
    • Silhouette Detection: Fs
    • Highlight Detection: Fh
• Brightness adaption

LeetCode:

• 189. Rotate Array

• 229. Majority Element II

• 169. Majority Element

• 162. Find Peak Element

Reasearch:

• Read paper.

Why did I choose research?

T_T

Research:

Some important tips about loading textures in shaders:

• Remember to glDeleteTextures(1, &texId) in each cycle. Otherwise, it will cause memory overflow.
• GLuint textureId must be initialized to different numbers, if there are 2 textures:
  • GLuint textureId[2];
    • It will load the second texture for BOTH textures, the first texture will disappear.
  • GLuint textureId[2] = {0,0};
    • It will load the second texture for BOTH textures, the first texture will disappear.
  • GLuint textureId[2] = {0,1};
    • Good! This is the correct way!
• GL_PIXEL_UNPACK_BUFFER

LeetCode:

Merge Intervals

Insert Interval

Unique Paths

Unique Paths II

Research:

• Finish CITI courses.
• Register in IRB
• Should ask Eric about next steps.

Leetcode:

• 53-maximum-subarray
  • DP

• 48. Rotate Image

  • Use new_i = …, new_j = … when updating i,j. Then i = new_i, j = new_j. Otherwise, the newly calculated i will affect the calculation of j
• 54. Spiral Matrix
  • Check if break after each direction in each ring
• 59. Spiral Matrix II
  • There is no need to check breaking in left and up route!!

Waiting:

• waiting for installation of softwares on chibwks04. So I can make tests on the PC
• waiting for HDMI ->VGA connector.
• wating for Eric about next steps

 

Research:

• Adjust the light field so it can focus
  • How to use transformation matrix in Matlab for OpenGL?
• Search about FR for light field (Keywords: foveated, lightfield) 1-4 pages in google scholar
• An interesting concept: Saccadic suppression

Research:

• Read Eric’s code about KroEngine
• about use of glFinish(), re-test the times
• revise PPT

LeetCode:

• 35. Search Insert Position
• 33 & 81. Search in Rotated Sorted Array I & II

Parallel Computing Study:

• Lesson3
  • Exclusive scan & Inclusive scan
  • Hillis Steele Scan & Blelloch Scan:
    • HSS (Inclusive) step efficiency
      • step: log(n)
      • work: nlog(n)
    • BS (Exclusive) work efficiency
      • step: 2 * logn
      • work O(n)
    • How to choose?
      • If have more work than processors: Blelloch Scan
      • If have more processors than work: Hillis Steele Scan
      • If serial: step: O(n), work: O(n)
  • Histogram
    • bins
    • atomic operation for memory

Guitar:

• practice