Wednesday, September 23, 2009

HDR Aquisition - Gear

First before we get into gear, we need to decide how you want to take your panoramic HDRs.  You can shoot an panoramic HDR with just about any lens.  It just depends on how much time you have to devote to shooting your complete data set.

Generally the longer the lens the more angles you'll need to take a complete panorama.  And that will increase your final overall compiled image resolution.  The wider the lens the fewer angles you need to take for a complete set but then you will have lower resolution compared to shooting with a longer lens.  Final resolution also depends on your camera's Megapixel size.

There are lots of different types of setups for shooting HDR panoramic environments.  Below is my current setup, and I will also go over some of the alternative gear available.

Since we are talking about on set data acquisition my setup is geared towards speed.  Thus I am using a wide angle lens.  In addition I put a my 24-105mm lens and shoot a non spherical pano with the same system outline below.  This is good for background plates where resolution is the key.

My Gear for Shooting panoramic HDRs on Set.
I would consider this a solid DSLR HDR panoramic setup.  This setup has a full frame censor and the 8mm fisheye lens can shoot an entire panoramic environment with just 3 angles (120 degrees apart).

If you have a cropped censor you can still use the utilize this lens but you will need to shoot 4 angles (90 degrees apart).  Sigma also makes a 4.5 mm fisheye lens designed specifically for cropped sensor DSLRs.  They make a variety of mounts for this lens to fit cameras from Canon, Nikon, Pentax,  and Sony.  The 4.5 mm fisheye will allow you to shoot a full panoramic just like a Full Framed DSLR in just 3 angles.

With my current setup I can shoot a full panoramic HDR in about 2-4 minutes depending on the on set lighting conditions. 

There are few newer tools that will speed up this process.  One of them is the Promote Control System.  This device aims to increase the standard 3 images (+/- 2 EV) for Canon Cameras.  This system also works with Nikon cameras but some Nikon cameras have an advantage where their in camera auto bracketing takes up to 7-9 exposures.  The Canon 1Ds MkII/III is the only Canon camera the shoots an auto bracket sequence of more than 3 exposures.  It can shoots 7 (but who has $8k to spend on a camera!).

Check back as I will be reviewing the Promote Control system in the coming weeks.

Other Available HDR Panoramic Gear

If you have the deep pockets or your working on a big budget feature film you might want to check out some super custom imaging systems.  But if your pocket aren't overflowing with cash there is also some budget gear out there to get you started.
  • HDR-CAM
    • An all in one solution geared towards feature films.  This robust stem can be fired remotely meaning you can stick it in many places there it would be dangerous or impossible for a person to shoot an environment. (ex. on a Technocrane).  This system comes with a complete software package that will compile, log, and prep your HDR for import into Maya.  I believe this system is for rental only.
  • Spheron
    • The Spheron has been around a long time.  It's manufactured in Germany so it has to be good right?  This is a custom imaging system that shoots a full spherical HDR in one pass that has a dynamic range of 26 f-stops.  Like all systems I'm sure this one has a hefty price tag.  It also looks like Spheron has a service for capturing as well.. if you don't want to buy the system.
  • Panoscan
    • The Panoscan is another custom imaging system that has its optics designed for the camera from the ground up.  Some of this systems highlights (according to the website) a full scan takes 54 seconds.  Shoots in low light up to ISO 3200, Autowhite balance, accepts Mamiya, and Hasselblad lenses, and its unique magnetic slit cap improves image quality by blocking lens flares and reducing glare.  
    •  These guys demo their product for me a couple of year ago and it was very impressive and solidly designed.
  • Peace River
    • These guys make a ton of different products.  A standard pano head simular to the nodal ninja and they have a super robo automated panoramic head.  I have not used it my self,  but my good friend Eric Hanson over at xRez has been using their system for years.  I might have to swing by his shop and bring some beers to get hands on review for ya guys.
  • Ipix Products for consumer and DSLR cameras
    • Ipix has been around since 1989 and was one of the first companies to start doing 360 QTVR type stuff.  They carry Peace rivers' 3Sixty pano head but also offer lens and pano head for more consumer type cameras (Nikon P6000, P5000).
  • Panosarus
    • a budget pano head.
  • Manfrotto Pano head
    • One of the only "Big" camera accessory manufactures to get into the panohead business.  It is a solid head and does the job, but I cannot recommend it because of the complexety of its setup.  A previous company had one of these and basically it's great once it's setup and configured.. but I hope you have a good memory and some time if it needs to be assembled.
Lets not forget about tripods.  They are very important piece of the puzzle.  You don't need a crazy carbon fiber rig but if you got the cash spend some money on with with a self leveling ball head incorporated into the tripod like many of the Gitzos.

And lastly don't for get a good carrying cases and travel protection.  I love camera bags, but I have a lot of them.   But the one I use most is my Kata Rucksack.  I can jam my Camera, 8mm, 24-105mm, 16-35mm, my speedlight, battery charger, cleaning supplies, many cords and cables and I don't feel like I'm a hunch back with a big sign saying "MUG ME" i have lots of camera gear.

That's if for now... Next time we tackle the setup!  We'll configure out panohead, learn how to find the nodal point of any lens, and setup our camera.

Cool! The Digital Wallpaper by strukt studio

Hirzberger Events - Digital Wallpaper from Gregor Hofbauer on Vimeo.

Ten Stereoscopic Tricks I Learned From Pixar

Ten Stereoscopic Tricks I Learned From Pixar

Tuesday, September 22, 2009

HDR Aquisition - Introduction

Last week I went to a VES event on HDR usage in visual effects. After talking with a friend I realized that I have not written much of anything on HDR acquisition.

Most VFX Supervisors and artists now about HDRs. But they might not know how to capture and compile one. Lucky for us the tools have gotten much better in both areas!

Getting a good set of usable HDRs takes a bit of practice, familiarity with some basic photography rules, the right gear, and good communication with the First A.D. on set. Typically in pre-pro they're like yeah just let me know and we'll get you in there. But the reality is the second the "VFX Guy" drops his tripod on set to start taking HDRs the First A.D. is already yelling to "CLEAR SET!".

That's when practice and having the right tools on set pays off. And taking a fast and usable HDR data set will make your life a lot easier when you get back to the office.

I'm going to assume that we all know what HDRs are and how we use them in post production. But if you need a bit of a primer check out these links.
To make this a bit more digestible I'm going to break the whole thing down into separate entries.
  1. Gear - what kind of gear do you need to take HDRs.
  2. Setup - how to setup and and be "Johnny on the spot" on Set.
  3. HDR image capture - the process of actually taking the pictures.
  4. Stitching the HDRs together.
  5. Processing the HDRs and getting them into your software of choice.
The process is generally the same but there are many variations largely depending on what equipment you have. I'm going to break down my process using my gear but the general theory applies across many different gear sets.

Feel free to hit me up with any questions along the way and I'll do my best to answer them!

小米記趣~『沒理由的阿母就是想張貼』

不知為何阿母喜愛這一張照片的小米,
雖然背景很混亂,
雖然鏡頭有點失焦,
但是這一回眸就挺有fu的。
反正放上去哪有需要那麼多理由阿~再問就放狗咬人囉~



加上這一張,阿母也很愛,這擺明就是弄臣系列來著的。

Saturday, September 19, 2009

小米記趣~『發現陳小米是大力水手』

因為小米開始吃副食品,
擔心他大便不順暢,所以更注重他在水份的攝取,
今天早上當他躺在地墊上面玩耍時餵牠喝水,
本以為他雙手在奶瓶附近盤旋是來亂的,
殊不知熊熊發現,他居然用雙手將玻璃奶瓶緩緩舉起且慢慢的對準他的嘴巴進攻,
媽呀~真是令媽媽疑惑,
不是下午才打算給他跟菠菜來個初體驗的嘛?!
怎麼還沒吃,就已經是大力士普派來著的呀~

請看看那結實且兩個圈的米其林雙腿。


奶瓶有重到需要眉頭深鎖糾結在一起嘛?!


加油加油~這動作多練幾次,阿母相信很快你就可以把身體支撐起來爬行了。


鬥雞眼的將奶瓶跟嘴巴對準


為何那米其林雙腿還一直用力著,舉杯這回事需要動用到全身力氣咩?!


呼~喝到水囉!

Friday, September 18, 2009

小米記趣~『錦囊妙計-玩具總動員』→租賃玩具第二回之心得報告

這個月又幫小米租了三項玩意兒,
當然也是有拱龜的啦,
不過一樣玩具一個月花個兩三百快的租金,
即便不和小米老大的意,
北木我們也比較不會心疼把白花花的鈔票付諸流水。
以下就是這月份的心得報告啦~

信誼音樂滾筒


看表情就知道老大並不很愛,就是偏向所謂的『拱龜』款。


費雪聲光套圈


這不賴,有聲光搭配,可惜對小米來說,要把物件完整拿好套入圈圈裡面,還真是挺困難的動作,且這一款的電路有點秀逗,所以並不是每每放進去的物件都會發出聲音。


vtech滾滾球


也是個兼具聲光效果的玩具,且不論是按圓形方形或是上面的動物,都會發出相對應的英文以及會瘋狂邊滾邊唱歌。我想如果這三款比較起來,我覺得這一款是勝出的。


總歸一句,小米老大喜愛重口味(聲光以及自動轉動的機絲)的啦!

Thursday, September 17, 2009

小米登大人之坐的穩系列

小米開始可以坐的四平八穩,
也邁入要告別從四個月開始習坐的bumbo seat改換到fisher price的攜帶式兒童餐椅,
從喝母奶→吃副食品;躺著看→坐著玩,坐起來看的視野與玩的玩具也不同於躺著時代的單一性,
這就像是從單細胞往多細胞的方向逐漸發展著,更趨近於人類了!
這也表示北木的辛勞有獲得那麼些稍稍的回報啦。
小米,加油唷~爸爸媽媽還想著要帶你去游泳、逛美術館、堆沙坑、紐約回憶遊…就只差你要快快長大的囉。

媽媽總感覺小米這一張好像不只六個月,而是已經一歲多的熟樣


小米(舉手發問):我可以試試積木的品質嘛


媽媽:請問要怎麼試呢?


小米:就是這樣阿

東咬咬,西咬咬阿

這個品質不賴,德國安全塗料,台灣製造,檔次高阿~

小米記趣~『不正經看書姿勢大解析』

選定書籍


開始要翻書囉


不正經姿勢一:手腳一起翻書頁

不正經姿勢二:


不正經姿勢三:招財貓手勢


不正經姿勢四


不正經姿勢五:看看那手勢,練功嘛?!這位小朋友~


不正經姿勢六:貓爪壓書面

AE tips: AE loopout type

在After Effects的 expression程式庫 loopout type預設值是 cycle, 可以試試 pingpong/ offset/ continue (hmmm.. this one is not working actually!), numKeyframes = 0 是指被loopout expression影響的keyframe數量, 0代表所有keyframe都影響....

Saturday, September 12, 2009

小米記趣~『媽媽看圖說故事的情境劇』

小米:為什麼看的到,卻吃不到呢(請看小米的嘴巴)


小米:眼睜睜看爸爸大快朵頤,這還能不稱作過分嘛!


小米:道高一尺魔高一丈,想要偷襲的手居然被爸爸快了一秒的牽制住了,氣~


爸爸:怎麼好吃的蛋糕三兩口就吃完了呢,懊惱中。
小米:食物被大老鼠吃個精光,怎能開心起來的呢。
一對結屎面的父女!!

小米記趣~今天請叫我小米超人。。。

我是超人


蓄勢待發


起飛啦。。。。。

小米終於解禁登大人,開始吃副食品囉~

因為有過敏體質的北木,所以陳小米沒有選擇性的榮獲過敏兒的殊榮,
也正因為如此,在吃的部份,要特別的注意,深怕一不小心把過敏原引起,
那可真是天雷勾動地火,一發不可收拾阿。
醫生建議小米在滿六個月以後,腸胃道也比較健全了,
再搭配米精開始從當令且溫和的食物著手。
本擔心小米會不會一開始還不習慣吞嚥的動作,
但事實證明為娘的我完全過度擔心了,
小米不但沒有不習慣,且還吃個精光。
我想他心理的旁白一定說著:沒想到人類的食物見鬼的那麼好吃!!yummy~yummy~

阿爸發出:阿。。。。。


鎖定目標,大口咬定,還感動的緊握著阿爸的手。


媽呀~動好食(客家話超級好吃之意)


讚的啦


幾乎吃個精光

小米記趣~『睡醒N連拍』

有一天心血來潮,
白目的媽媽就發現小米睡覺的模樣似乎沒有記錄過,
因此就趕緊把相機抓來拍下孰稱熟睡時的天使面孔,
殊不知,不知道是阿母我動作太粗魯還是小米真的很敏感,
快門才剛按第一下,ㄜ~陳小米就逐漸清醒了!

熟睡中


是誰在拍我?


眼睛再睜大一點看看是誰打擾我的清夢


厚~是淘氣的阿母呀!


拌個小鬼臉


完全沒睡意了,起床囉~旺旺。。。

Friday, September 4, 2009

The Happiest Baby!


An interesting program call "The Happiest Baby!" about how to assist new Daddy and Mommy to clam down their unreasonable crying baby, feature by Dr Harvey Karp....

some video clips on YouTube!