Confessions of a researchaholic

2018-09-09

Airplane, drawing from a photo

Filed under: Real — liyiwei @ 9:38 pm
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I focused more on the frontal building facade to improve the perspective issue in my previous drawing, using another photograph that has no foliage to divert my attention.

I marked the two vanishing points to begin with, both in the wrong locations.
The one on the sky should be more on the left but I adjusted it rightward a bit to have more converging window rows.
The left horizon vanishing point is outside the photo frame, so I fitted it back into the drawing canvas.

2018-09-08

Airplane, drawing from a photo

Filed under: Real — liyiwei @ 10:05 am
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Looking upward towards buildings is a classical exercise to practice perspective. It took me a while to plan the vanishing point at the sky and the corresponding vanishing lines of the building contours.
I did not do so for the horizontal vanishing points/lines because I was bored after spending over one hour and I would like to work on the foliage on the left side.
As a result, the windows are incorrectly structured and gave the impression that the building facades were made of crumpling papers.

Spot drawing was infeasible for this one; the airplane flew by in seconds and the weather was hot and bright at noon.

I have another airplane fly-by photograph to practice.
My goal is to correctly structure the windows without getting bogged down by details. For example, outline contours instead of detailing individual windows.

Culture throwback: an overhanging warplane is a popular motif in Japanese manga like Akira and ghost in the shell. I plan to draw one as well.



2018-09-07

Photographic drawing

Filed under: Real — liyiwei @ 7:57 pm
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Daichi and I spent the entire noon hour taking photos around.
There are similarities between drawing and photography in both goal and process: observation, selection, framing, and composition.
Photography by itself is a faster and less flexible means to record and convey visual impression.
However, it can serve as visual memory for later drawing, relaxing space and time constraints.
For example, I am not fast enough to catch a fly-by airplane via spot drawing, so a photograph can help.

I have enough footage for at least a month’s worth of drawing, even if I draw every day.
I will gradually post up my progress.

2018-09-03

Writing style for revision control Latex source

Filed under: Real — liyiwei @ 2:27 pm
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Put one, or at most a few, complete sentence(s) into one line.
Latex treats line breaks as spaces, so the compiled document will still have the correct formation.

Since popular revision control tools like git/svn are based on line diff, putting too many sentences in one line will cause excessive revision differences and obscure the actual changes.

Avoid artificial line breaks in the middle of the sentences, which tend to confuse the spell-checkers and the git/svn line diff.

2018-09-02

Drawing a dried insect on a window sill

Filed under: Real — liyiwei @ 3:51 pm
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Life is full of hidden, fleeting beauty that one feels lucky to witness.

I was supposed to be writing a paper, the room was too dark, so I opened the window, saw the dried insect on the sill, and could not resist drawing it.

This one took me only a few minutes to complete; I look forward to accompany my dad during his speed drawing sessions.

2018-08-31

Practicing perspective drawing

Filed under: Real — liyiwei @ 3:06 pm
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We went to the intersection of Park and Almaden to draw the street palm trees.
To help provide guidance, Daichi instructed me to frame the picture first followed by high-level structures: vanishing points/lines, horizon line, and placeholder of the tree trunks.
This is a relative easy one for me, once I refrained from incorporating too many details. After finishing the drawing, I noticed the background buildings spontaneously form up.

We sat on the benches in front of the movie posters of the center of performing arts.
A homeless person loitered around speaking loudly to himself without bothering us.

2018-08-26

Git research source

Filed under: Real — liyiwei @ 3:53 pm
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Below is a summary of my suggestions of using git to manage research source, based on numerous discussions I have had with my collaborators across multiple projects at multiple institutions.

Always revision control your code. There are multiple options, but at this moment of writing, git beats alternatives such as svn and perforce.

Use github for public repos and bitbucket for private repos.

Start with existing code if feasible. If the code is already under git, use submodule as a component or fork/branch as an extension. Otherwise, convert the code into git, and preserve revision history whenever possible (e.g. github/bitbucket can help you convert svn repos into git repos).

Use multiple branches for different versions of the code, such as stable branch for release or a personal branch for experiments.
Use multiple remotes across organizations and time-frames.
For example, during your internship with a company, use an internal corporate github repo, and sync it with an external bitbucket (private) repo at the end of your internship so that you can continue the project at your school. When you are ready to publish your code, mirror it to a public github repo.
Keep multiple remotes under the same repo for easy management.

For paper drafts, you can create an overleaf git branch for more WYSIWYG-style editing while retaining all the benefits of branching and revision control.

Keep one (or at most a few) sentence(s) at one line, to avoid false alarms from spell checkers (broken sentences) and excessive (line-based) diff by git.
Note that Latex treats line breaks as spaces.

Chongyang Ma (@ Snap Research) has recommendations for industry research code practice.

2018-08-20

Shadow QA

Filed under: Real — liyiwei @ 2:41 pm
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During the QA after each paper presentation, it is common for the advisers to help the students, especially first-timers, to answer (or translate) questions.

I used to sit on the stage, which I dislike as the bright podium light can shine directly into my eyes. I once shielded my eyes with a hoodie, and people commented that I looked like a gangster.

Then I switched to sit on the front row and step up to the podium during QA. People can see my face; I prefer to remain invisible.

Finally, this year one of my papers was presented in a large, dark ballroom.
A narrow light beam casted over the speaker and the podium was right on the edge of the stage, which allowed me to sneak aside without being seen.
This is my favorite stage design so far.

2018-08-16

The coolest I have seen in SIGGRAPH 2018

Filed under: Real — liyiwei @ 7:39 pm
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Coolest demo in real-time live: AI + animation in addition to sketch-based modeling in Teddy
https://youtu.be/lF3zST6kO8k

Very cool VR format for anime/manga by Square Enix

Coolest exhibition: the looking glass autostereoscopic display, the game demo, for the first time, made me think that consumers might finally want to buy a 3D display at home.

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