typebrook/.gitignore

## .gitignore
dist/
plugin/
css/
*.html
assets/

## favicon.ico

      
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## reveal.json
{
  "slideNumber": "c/t"
}

## slide.md

      
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              slide.md
            
          
  title
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  帶著 360 相機拍街景
  serif
  
====

  c/t
  
  
About me


謝晉凡 / Pham
OSM-TW Community member
Hiker

Contacts:

pham@topo.tw
https://topo.tw/
https://github.com/typebrook/

Note:

比較像是讀書心得
相機生手，不吝指教

Index


緣起
認識街景服務平台
認識 360 相機
處理全景照片
FFMPEG
上傳步驟

====
緣起


維基媒體聯盟基金支持那些能夠為維基媒體運動的策略方向做出貢獻的組織，
...
我們強調在運動中代表性不足的社群和歷史上被邊緣化的社群需要獲得他們所需的資源以實現他們的目標。
與使命一致的組織和團體的計劃可以專注於支持貢獻者、編輯、內容、凝聚力、
技能培養倡議、宣傳工作、策略規劃以及與當地維基媒體社群和維基媒體項目發展穩定的夥伴關系。 


    翻譯：我們有相機啦！


Note:
但是，歹誌嘸家尼呀乾單

相關連結


第一次踏查團心得
第二次踏查團心得 (Video)


====
街景服務平台


Why ?

Note:
Talk about OSM

街景服務平台


No Google !
Easy API


Billing!


Mapillary


Note:

Facebook
API


Kartaview


Note:

覆蓋較少


API & TOOLS


API & TOOLS


Sequencce

A collection of photos captured continuously


Dashboard

Note:
A sequence is a collection of photos captured continuously by an OpenStreetCam user. Available connected-resources: attachments, rawdatas, photos, videos.
Available joining resources for : photo(first photo of the sequence used for thumbnails), attachment(first attachment of the sequence specific cases like ), user(owner of the sequence).
Available joining resources for one resource request: Photo list, Attachment list, RawData list, Video list.
Restricted access on GET list if there isn't at least one query parameter provided from the following: id, idInterval, region, startDate, userId, tLeft, bRight, withAttachments, withPhotos.
Represents a sequence of Image IDs ordered by capture time.
====
360 相機


Insta360 ONE X2
兩顆魚眼鏡頭
定時/遙控攝像


使用機車拍街景


Note:

視野較好(比較)
背包示範


Insta360 studio


Insta360 studio


Insta360 APP


Note:

scrcpy


截取相片

/DCIM
├── Camera04
│   ├── IMG_20220522_115803_00_001.insp
│   ├── IMG_20220522_115803_00_002.insp
│   ├── ...
│   └── Thumb
│       ├── IMG_20220529_095231_00_119.bmp
│       ├── ...
│
├── Camera05
│   ├── IMG_20220619_104522_00_001.insp
│   ├── IMG_20220619_104522_00_002.insp
│   ├── ...
│   └── Thumb
│       ├── IMG_20220619_113507_00_336.bmp
│       ├── ...

====
雙魚眼鏡頭的轉換


360 相機原理


Note:
略過細節，我也還沒準備把它裝到腦袋裡

全景/周視圖(Panorama)


Cubic Map


====
FFMPEG


Free, open-source software for multimedia editing, conversion, …
Started in 2000
The best solution for video (in most of the cases)


How it works?


讀取圖片

ffmpeg 
    -f image2 \
    -pattern_type glob \
    -i input/'*.insp'
    output/'%03d.jpg'

AllTogether

ffmpeg 
    -y -hide_banner \
    -f image2 \
    -pattern_type glob \
    -i input/'*.insp'
    -vf <name>=<option1>=<value1>:<option2>=<value2>
    output/'%03d.jpg'

filter v360


yaw
pitch
roll


filter v360


Note:
轉頭示範

filter v360


format

equirect
c3x2
c6x1
c1x6
rectilinear
dfisheye
fisheye
...


v360=input=dfisheye:equirect:ih_fov=190:iv_fov=190


ffmpeg -y -hide_banner \
    -f image2 \
    -pattern_type glob \
    -i input/'*.insp' \
    -vf "v360=input=dfisheye:$(OUTPUT):ih_fov=$(FOV):iv_fov=$(FOV):yaw=0:pitch=0:roll=90" \
    -threads 8 \
    output/'%03d.jpg'

ffmpeg
    -i front.mp4 
    -i fusion2sphere0_x.pgm -i fusion2sphere0_y.pgm 
    -i frontmask.png 
    -i back.mp4 
    -i fusion2sphere1_x.pgm -i fusion2sphere1_y.pgm 
    -i backmask.png 
    -filter_complex "
        [0:v][1:v][2:v] remap [front]; 
        [4:v][5:v][6:v] remap [back]; 
        [front] format=rgba [frontrgb]; 
        [back] format=rgba [backrgb]; 
        [frontrgb][3:v] blend=all_mode='multiply':all_opacity=1 [frontmask]; 
        [backrgb][7:v] blend=all_mode='multiply':all_opacity=1 [backmask]; 
        [frontmask][backmask]
    blend=all_mode='addition':all_opacity=1, format=rgba" -pix_fmt yuv420p 
    output.mp4


Remap: pgm files

P2
10 10
255
0 255 255 255 255 255 255 255 255 255
255 0 255 255 255 255 255 255 255 255
255 255 0 255 255 255 255 255 255 255
255 255 255 0 255 255 255 255 255 255
255 255 255 255 0 255 255 255 255 255
255 255 255 255 255 0 255 255 255 255
255 255 255 255 255 255 0 255 255 255
255 255 255 255 255 255 255 0 255 255
255 255 255 255 255 255 255 255 0 255
255 255 255 255 255 255 255 255 255 0 


鏡頭校正-lensfun

https://lensfun.github.io/
====
其它工具-hugin


其它工具-fusion2sphere

====
上傳 360 相片


https://github.com/kartaview/upload-scripts
https://github.com/mapillary/mapillary_tools


EXIF for 360

exiftool
  -overwrite_original \
  -UsePanoramaViewer=TRUE \
  -ProjectionType="equirectangular" \
  -tagsFromFile input.jpg output.jpg \
====
難點


相機的限制


電池/熱當
控制器
使用模式
記憶容量
定位問題

====
Reference


ffmpeg

https://slhck.info/ffmpeg-encoding-course/
https://ffmpeg.org/ffmpeg-filters.html


Street View

http://doc.kartaview.org/
https://www.mapillary.com/developer/api-documentation


Example

https://www.trekview.org/


Reference


Scripts

With fusion2sphere: 

https://gist.github.com/87babb88170f85607a29364712c108e0/
With ffmpeg: 

https://gist.github.com/c161704460aed34351e68b5a46df1b4b