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Quorten Blog 1

First blog for all Quorten's blog-like writings

Camera media technology, expense of human eye quality

quorten

2015-09-12

Categories: media-prog   pentax-k-1-camera  
Tags: media-prog   pentax-k-1-camera  

Now, media technology research continued. First, I start by reviewing the article on the Kinescope. Then, I come across an interesting term: Filmizing.

20150911/https://en.wikipedia.org/wiki/Kinescope

Why interlaced scan? Again, this is because early CRT technology wasn’t good enough to display progressive scan at 60 frames per second. The technology was too slow, so it could only display 30 frames per second.

Filmizing as an intentional effect? Yep. Okay, so what’s the differences between film and television? Film has a slower frame rate, a narrower shutter angle, a wider dynamic range (though the gap is closing with modern digital cameras), field of view is about the same, the depth of field may be wider (less blurability), film can be color timed whereas television is mainly white-balanced, film grain noise is significantly different than PMT (photo multiplier tube)/digital sensor noise, film features jump-and-weave whereas television does not.

Read on →

Languages, and UCLA's Open Compute Facility

quorten

2015-09-09

Categories: misc  
Tags: misc  

I’m wondering, why exactly did the English language become so popular? Was it really because of 19th century Victorian Era industrialization? Well, looking into the Wikipedia article on the subject, that’s basically it. That and British Empire colonization.

20150908/https://en.wikipedia.org/wiki/English_language#Spread_of_Modern_English

“Latin is a dead language.” Latin use to be the lingua franca, before English took over. Why did Latin fall? Basically, it had to do with the fall of the Roman empire.

20150908/https://en.wikipedia.org/wiki/Latin_language

Now, I”m wondering. Which language is the oldest language? Could it be Chinese? Mandarin is another word for Standard Chinese. And in fact, Mandarin is the second most popular native language, after Spanish. English comes after Mandarin as a third, but English is probably the most popularly used language in the world when counting learned speakers.

20150908/https://en.wikipedia.org/wiki/Chinese_language
20150908/https://en.wikipedia.org/wiki/Standard_Chinese

Read on →

Imaging systems, moire patterns, sampling

quorten

2015-09-09

Categories: media-prog  
Tags: media-prog  

Imaging systems and Moire patterns. Why does the human eye not have these artifacts ever? That’s because the sensors on the human eye are not arranged in a perfectly crystalline grid structure. Thus, it is extremely unlikely for aliasing artifacts to occur on the human retina, though in theory, it is still possible. This is also the same reason why advanced raytracing systems use a random sampling of pixels rather than a perfectly uniform grid structure: to make the probability that aliasing artifacts will occur extremely unlikely. Thus, it will not be necessary to do Fourier frequency analysis to avoid aliasing artifacts when downsampling. Really? That’s really interesting. It’s too bad that Blender is not designed by perfect principles like that. It’s amazing that anything gets done correctly when you realize exactly how many problems our current multimedia technology has.

That’s a very interesting idea to pursue. Design a downsampler that uses randomized point distributions to avoid Moire patterns. You use randomization to in effect reduce the probability that a Moire pattern will occur to zero.

Read on →

Photograph series 3D scanning

quorten

2015-09-08

Categories: 3d-scanning   3d-scanner  
Tags: 3d-scanning   3d-scanner  

Automatic 3D scanning with a series of photographs? Not quite ready for prime time. As one particular example, for one particular photogrammetry application, Photoscan, 256 GB of RAM “is not unheard of for use with this program.”

20150907/http://www.tested.com/art/makers/460057-tested-dark-art-photogrammetry/

So, sounds like things are a long ways out. At present, you might as well use software that you develop yourself. Or software that I’ve developed myself. Or software that I recommend that’s been developed by other people. But beyond that, unless you are really skilled at Internet search, you’re not going to be able to turn up useful results.

UPDATE 2019-11-23: The name of this game is “photogrammetry.”

How film is developed and scanned

quorten

2015-09-08

Categories: media-prog   pentax-k-1-camera  
Tags: media-prog   pentax-k-1-camera  

How is film developed? Oh, that’s how. It requires lots of dangerous chemicals to develop and fix the image.

20150907/http://www.wikihow.com/Develop-Color-Film
20171225/https://www.wikihow.com/Develop-Black-and-White-Film
20150907/https://en.wikipedia.org/wiki/Film_developing

  • Again, I reiterate, because this is important! I searched for this and found it, that means it’s important!

Can it be done automatically? Definitely. The Wikipedia article says that’s how it’s done in commercial film processing. Ideally, you want to scan your own developed films so that you can get the highest resolution.

I’m interested in very high resolution imagery.

This is insightful, not for my particular question, but from a general standpoint.

20150908/http://theonlinephotographer.typepad.com/the_online_photographer/2012/01/scan-film-with-camera-1.html

Again, the flatbed scanner turned into a digital camera.

20150908/http://www.sentex.net/~mwandel/tech/scanner.html

Okay, that’s it. I’m assuming there’s nothing else out there on the Internet on my subject, so I’m stopping.

Interesting info on cameras, rangefinders, and the like

quorten

2015-09-08

Categories: media-prog   pentax-k-1-camera   3d-scanning   3d-scanner  
Tags: media-prog   pentax-k-1-camera   3d-scanning   3d-scanner  

Some interesting discoveries on cameras, rangefinders, and the like.

20150907/https://en.wikipedia.org/wiki/Autofocus
20150907/https://en.wikipedia.org/wiki/Plenoptic_camera
20150907/https://en.wikipedia.org/wiki/Angle-sensitive_pixel
20150907/https://en.wikipedia.org/wiki/Stereo_camera
20150907/https://en.wikipedia.org/wiki/Rangefinder
20150907/https://en.wikipedia.org/wiki/Ultrasonic_motor
20150907/https://en.wikipedia.org/wiki/Acoustic_levitation

An interesting walkthrough of a 3D scan and print using proprietary software from around the year 2002 or so. It’s interesting that although the technology has been around for so long, it’s still to obscure and expensive to be practical on the mass market.

20150907/http://fab.cba.mit.edu/classes/863.12/people/jinjoo/HowToMake/3DScan.html

Yeah, interesting, but 96 DPI web resolution photographs fail to provide the reader with enough detail in the image. Wow, keep this in mind when making recommendations on the inventory system technologies. The problem with low resolution photographs is that the resolution is never high enough, and the problem with 2D photography is that the 2D photographs are never taken from enough angles. And the problem with black and white photographs is that the colors aren’t accurately depicted. But it’s still better than no photograph at all, isn’t it? Yeah, yeah, I guess you’re right. That being said, that’s the current limitations of the technology you’re working with.

Read on →

Lies and lies to children

quorten

2015-09-08

Categories: misc  
Tags: misc  

I need to take these into consideration.

20150907/https://en.wikipedia.org/wiki/Lie
20150907/https://en.wikipedia.org/wiki/Lie-to-children

Interesting info.

20150907/https://en.wikipedia.org/wiki/White_stork#Storks_and_childbirth

Java restricted local filesystem access for security

quorten

2015-09-08

Categories: security  
Tags: security  

Java. No local filesystem access? Why not? Security, they say. The local filesystem has no sufficient security by default. Of course not. And of course you’re not supposed to be storing private data in the local file system. And if it is private, there shouldn’t be all that much to loose. After all, the file system is supposed to be a small partition. Big data should be delegated to large partitions.

True, but the imprecision of how people use computers results in this not being the case.

Typewriters, mainframes, thoughts on our efforts to build computers

quorten

2015-09-08

Categories: computer-history   tour-de-force  
Tags: computer-history   tour-de-force  

On typewriters. 50 lines is a good number used for the number of lines in the body text, excluding headings and footers. Footers can bring the text up to 55 lines.

20150907/https://en.wikipedia.org/wiki/File:Typerwriter_conventions_text_example.gif

20150907/https://en.wikipedia.org/wiki/Typewriter#Typewriter_conventions

Times, not x! Times, not x! Times, not x! Times, not x! Oh, oh, now I get it.

20150907/https://duck.co/ideas/idea/4794/6-7-should-output-the-same-answer-as-6-7

The SAGE USAF missile defense system’s computer.

20150907/https://en.wikipedia.org/wiki/AN/FSQ-7_Combat_Direction_Central

Mainframe, stone age, iron age from the Jargon file. Insightful.

20150907/http://www.jargon.net/jargonfile/m/mainframe.html
20150907/http://www.jargon.net/jargonfile/s/StoneAge.html
20150907/http://www.jargon.net/jargonfile/i/IronAge.html

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Exact locations in archaeology

quorten

2015-09-07

Categories: inven-sys   asman  
Tags: inven-sys   asman  

Very important. In archeology, the exact location where an object is found must be recorded. Usually the horizonal location, and sometimes the vertical location. Also, as for best practices recommendations with Asman, the date should also be recorded. And this information should be exposed in a human readable format, again, for best practices. When possible, the tag should be assigned directly to the object in question, to avoid the tag getting lost in relation to the object. Otherwise, the best that can be done is to place the tag within the object’s proximity.

Archeology.

20150906/https://en.wikipedia.org/wiki/Archaeology
20150906/http://news.nationalgeographic.com/2015/08/150820-syria-archaeologist-isis-protecting-artifacts/

Whoops! I’ve misspelled archaeology, have I? This is the actual way that I wanted to spell it in my writings.