구차니의 잡동사니 모음

크게 쓸일이 느껴지진 않지만....

그래도 지원하는게 의외로 얼마 안되는구나..

[링크 : http://support-kr.canon-ci.co.kr/contents/KR/KR/8201440300.html]

사이즈는... 영어고 크기는 한글? ㅋㅋ

센서 사이즈는 대개 대각선 인치 단위인데

크기는 가로세로 mm 단위

그나저나.. 1인치 라고 해도 의외로 크진 않겠구나 싶어지네..

2/3 인치만 해도 CCTV에서 크다고 하는데..

암만 그래봤자 APS-C(canon) 보다 작다는게...

[링크 : http://photohistory.tistory.com/11906]

[링크 : http://xmlstar.sourceforge.net/]

[링크 : https://en.wikipedia.org/wiki/XMLStarlet]

[링크 : http://newmkka.tistory.com/382]

$ apt-cache search xml | grep let

xmlstarlet - command line XML toolkit

오랫만에 가지고 놀아 보려고 했더니..

망했어 ㅠㅠ

FFC 저거 구하기 빡센데 ㅠㅠ

일단.. sudo apt-get update; sudo apt-get upgrade로 시스템 업그레이드의 여파인가...

config.txt에서는 gpu_mem=128 였는데...

불 들어 옴

$ raspivid -t 0

mmal: mmal_vc_component_enable: failed to enable component: ENOSPC

mmal: camera component couldn't be enabled

mmal: main: Failed to create camera component

mmal: Failed to run camera app. Please check for firmware updates

불 안들어 옴

$ raspivid -t 0

mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)

mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)

mmal: Failed to create camera component

mmal: main: Failed to create camera component

mmal: Camera is not detected. Please check carefully the camera module is installed correctly

선 뽑고..

$ raspivid -t 0

mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)

mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)

mmal: Failed to create camera component

mmal: main: Failed to create camera component

mmal: Camera is not detected. Please check carefully the camera module is installed correctly

Last login: Wed May 25 19:49:45 2016

pi@raspberrypi:~ $ sudo rpi-update

 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom

 *** Performing self-update

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100 10670  100 10670    0     0  24776      0 --:--:-- --:--:-- --:--:-- 24756

 *** Relaunching after update

 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom

 *** We're running for the first time

 *** Backing up files (this will take a few minutes)

 *** Backing up firmware

 *** Backing up modules 4.1.19-v7+

#############################################################

This update bumps to rpi-4.4.y linux tree

Be aware there could be compatibility issues with some drivers

Discussion here:

https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=144087

##############################################################

 *** Downloading specific firmware revision (this will take a few minutes)

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100   168    0   168    0     0    188      0 --:--:-- --:--:-- --:--:--   188

100 50.5M  100 50.5M    0     0  1059k      0  0:00:48  0:00:48 --:--:-- 1381k

 *** Updating firmware

 *** Updating kernel modules

 *** depmod 4.4.11-v7+

 *** depmod 4.4.11+

 *** Updating VideoCore libraries

 *** Using HardFP libraries

 *** Updating SDK

 *** Running ldconfig

 *** Storing current firmware revision

 *** Deleting downloaded files

 *** Syncing changes to disk

 *** If no errors appeared, your firmware was successfully updated to 2b9c0bfacfc11ee8bb9b30dc9cdb36289698f8a8

 *** A reboot is needed to activate the new firmware

[링크 : http://raspberrypi..../what-causes-enospc-error-when-using-the-raspberry-pi-camera-module]

/boot/cmdline.txt:

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait bcm2708.w1_gpio_pin=18

[링크 : https://www.raspberrypi.org/...?f=28&t=61922&p=477860&hilit=enospc#p478550]

그냥... 현재 기준 신펌웨어로 바꾸니 문제 없다.

rpi-update로도 펌웨어 변경은 적용 안되는 듯?

TV system별 클럭차이..

결론(?)은 서브캐리어의 차이인데.. CVBS는 음성 없이 영상만 NTSC/PAL을 실어나르는데..

왜 27MHz로 30fps로 동일하지 -ㅁ-?

28.6363MHz for NTSC or 28.375MHz for PAL

CVBS (30 fps @ 27Mhz)

27MHz crystal clock for subcarrier generation

[링크 : http://datasheet.octopart.com/TW9920-BC1-GR-Intersil-datasheet-14388706.pdf]

In PAL system, the frequency of the system clock and the subcarrier signal are 28.375 MHz and 4.4336 MHz

[링크 : http://www.google.com/patents/US5946053]

In the PAL system, the color subcarrier is 4.43 MHz above the video carrier, while in the NTSC system it is 3.58 MHz above the video carrier. 

[링크 : https://en.wikipedia.org/wiki/Chrominance]

The frequency of this subcarrier is 4.43361875 MHz for PAL, compared to 3.579545 MHz for NTSC. The SECAM system, on the other hand, uses a frequency modulation scheme on its two line alternate colour subcarriers 4.25000 and 4.40625 MHz.

[링크 : https://en.wikipedia.org/wiki/PAL]

[링크 : http://wodnrrns.tistory.com/entry/NTSC-PAL-비교]

결론(?)은 HPF(High Pass Filter) 인가?

The simplest way to detect microcontrast is through a high pass filter (HPF). In the areas in focus, the detail will trigger a threshold set in the HPF, while out of focus areas wont's do so for being totally blurred in terms of high spatial frequencies.

[링크 : http://forum.luminous-landscape.com/index.php?topic=56246.0]

The simple recipe is to convolve with a Laplacian of Gaussian kernel (3x3, with 8 in the middle surrounded by -1 and take the abs(result)) .

[링크 : http://photo.stackexchange.com/questions/32388/how-can-i-focus-peak-a-photograph]

18-55mm 용 줌렌즈 캡이 없어서 하나 지르면서

겸사겸사 질렀으나...

한 업체에서 ND8을 팔지 않아 그냥 ND 필터는 포기...

22mm f2.0 렌즈 는 확실히 실외에서는 노출 오버라.. ND8 정도로 43mm 짜릴 사야 하는데...

호루스벤누 ND8이 만원으로 가장 싸나.. 취급하는데가 적은 듯 .. ㅠㅠ

나중에 아빠가 살일 있음 꼽사리 껴서 사야지 ㅠㅠ

회사 근처 한바퀴 돌면서 찰칵!

그나저나.. AF 느림, IS 없음, 심도 드럽게 얕음의 삼중고

+ 내 손고자 + 실력고자..

노답 ㅠㅠ

음? mpeg2 decoder?

[링크 : http://www.raspberrypi.com/license-keys/]

    This key will enable a single Raspberry Pi to decode MPEG-2 video in hardware.

    [링크 : http://www.raspberrypi.com/mpeg-2-license-key/]

    This key will enable a single Raspberry Pi to decode VC-1 video in hardware.

    [링크 : http://www.raspberrypi.com/vc-1-license-key/]

[링크 : https://www.raspberrypi.org/blog/new-video-features/]

[링크 : http://elinux.org/RPiconfig#Licensed_Codecs]

[링크 : http://raspberrypi.stackexchange.com/.../why-does-the-raspberry-pi-need-a-mpeg-2-licence]

DVD 재생시 영상을 디코딩 못하므로 MPEG-2 라이센스 필요?

[링크 : http://echo.tistory.com/93]

[링크 : http://echo.tistory.com/92]

vcgencmd codec_enabled MPG2

vcgencmd codec_enabled WVC1

[링크 : http://www.howtogeek.com/.../how-to-add-mpeg-2-and-vc-1-video-codec-...-raspberry-pi/]

mpeg 라이센스 활성화 시 ff-mpeg2video에서 omx-mpeg2로 변화된다고 한다.

[링크 : https://www.youtube.com/watch?v=3zToVK6U7AM]