RAW 檔輸出跟RAW 檔編修功能。
這兩個的不同是不是只在於，一個有編修檔的軟體？像PS一樣的？另一個沒有？
還是一個可編修，另一個不行？
請指教，謝謝。
請問RAW檔
版主: ross_tt、bryanchang、Faust
Re: 請問RAW檔
嗯...你講的好像都有耶～Impreza 寫:RAW 檔輸出跟RAW 檔編修功能。
這兩個的不同是不是只在於，一個有編修檔的軟體？像PS一樣的？另一個沒有？
還是一個可編修，另一個不行？
請指教，謝謝。
不過一般說來是,一個可大幅編修,一個可少量編修...
相對的絕對和絕對的絕對絕對是不同的--相對上來說.
轉載一篇 有關 RAW 檔 易懂的文章 一起參考一下... 
RAW Image Format
By Phil Askey
The most common image format amongst digital cameras is JPEG, it's a format which produces relatively small files from large amounts of image data by discarding certain information, as JPEG uses a "lossy compression algorithm". The only other common alternative is TIFF, this produces an uncompressed 24-bit per pixel image often in the multiple megabytes, certainly for a 3 megapixel camera in excess of 8 MB per image, not really practical. A little background: each pixel of a CCD can only see one colour, depending on the CFA (colour filter array) placed over the CCD this is either Red/Green/Blue or Cyan/Magenta/Green/Yellow. The cameras internal image processing engine then interpolates colours from the value of neighbouring pixels to calculate a full 24-bit colour for each pixel.
RAW is simply the raw data as it comes directly off the CCD, no in-camera processing is performed. Typically this data is 8, 10 or 12 bits per pixel. The advantage being that file sizes are considerably smaller (eg. 2160 x 1440 x 12 bits = 37,324,800 bits = 4,665,600 bytes), the image has not been processed or white balanced which means you can correct the image, and it's a better representation of the "digital negative" captured. The disadvantage is you can't open these image files with a normal photo package without using an "acquire module" (a plugin, typically TWAIN, which can open / process such images).
RAW image format has actually been around for quite a while, Canon had a RAW format back in the old PowerShot range and more notably on the Pro 70, all of Kodak's DCS Pro series shoot in a proprietary RAW format (despite the TIFF extension), Nikon's D1 also has a RAW format. Canon have (thankfully) resurrected RAW format for the EOS-D30 and G1.
Advantages of RAW format
A true "digital negative", untouched by cameras processing algorithms
No sharpening applied
No gamma or level correction applied
No white balance applied
No colour correction applied
Lossless yet considerably smaller than TIFF
Records data over a wider bit range (typically 10 or 12 bits) than JPEG or 8-bit TIFF
Disadvantages of RAW format
Requires proprietary acquire module (typically TWAIN) or plugin to open images
Images can take 20-40 seconds to process on an average machine
No universally accepted RAW standard format, each manufacturer (even each camera) differs
RAW Image Format
By Phil Askey
The most common image format amongst digital cameras is JPEG, it's a format which produces relatively small files from large amounts of image data by discarding certain information, as JPEG uses a "lossy compression algorithm". The only other common alternative is TIFF, this produces an uncompressed 24-bit per pixel image often in the multiple megabytes, certainly for a 3 megapixel camera in excess of 8 MB per image, not really practical. A little background: each pixel of a CCD can only see one colour, depending on the CFA (colour filter array) placed over the CCD this is either Red/Green/Blue or Cyan/Magenta/Green/Yellow. The cameras internal image processing engine then interpolates colours from the value of neighbouring pixels to calculate a full 24-bit colour for each pixel.
RAW is simply the raw data as it comes directly off the CCD, no in-camera processing is performed. Typically this data is 8, 10 or 12 bits per pixel. The advantage being that file sizes are considerably smaller (eg. 2160 x 1440 x 12 bits = 37,324,800 bits = 4,665,600 bytes), the image has not been processed or white balanced which means you can correct the image, and it's a better representation of the "digital negative" captured. The disadvantage is you can't open these image files with a normal photo package without using an "acquire module" (a plugin, typically TWAIN, which can open / process such images).
RAW image format has actually been around for quite a while, Canon had a RAW format back in the old PowerShot range and more notably on the Pro 70, all of Kodak's DCS Pro series shoot in a proprietary RAW format (despite the TIFF extension), Nikon's D1 also has a RAW format. Canon have (thankfully) resurrected RAW format for the EOS-D30 and G1.
Advantages of RAW format
A true "digital negative", untouched by cameras processing algorithms
No sharpening applied
No gamma or level correction applied
No white balance applied
No colour correction applied
Lossless yet considerably smaller than TIFF
Records data over a wider bit range (typically 10 or 12 bits) than JPEG or 8-bit TIFF
Disadvantages of RAW format
Requires proprietary acquire module (typically TWAIN) or plugin to open images
Images can take 20-40 seconds to process on an average machine
No universally accepted RAW standard format, each manufacturer (even each camera) differs
謝謝二位的解答，小弟還有不懂的是，有的相機有RAW檔輸出，有的有RAW檔編修的能力。http://www.dcview.com.tw/article/newrea ... sp?id=2495
也看了您上詳細解說，那這些沒有說可以編修的相機，意思是不是說，他只輸出，但不給你編修的軟體ㄋ？
也看了您上詳細解說，那這些沒有說可以編修的相機，意思是不是說，他只輸出，但不給你編修的軟體ㄋ？
據小弟去研究一下您的問題 終於搞清楚了...
我想 所有的 DC 只要能拍攝儲存 RAW檔案格式 都可以輸出RAW檔到PC
但您的PC 必須要有 支援RAW檔案格式 的編輯軟體 才能來編修
大部份支援RAW的DC 都有附limited edition軟體 像博士說的 功能有限
據說 RAW檔案粉大 要編修得好 並不是十分容易 要有經驗 主要用來印刷
至於這台 Olympus C-8080 Zoom 所號稱的 可以編修RAW檔案 有點誤導消費者
它提供在相機上 那個1.8吋的LCD Playback時 可修改 RAW的資料 或 crop...
然後重新儲存為 TIFF 或 JPEG檔案 聽起來不錯 但LCD實在太小 會很難...
英文參考:
One of the Playback menu options allows you to edit RAW image files.
Here you can alter the parameters (resolution, white balance, WB fine tune,
scene mode, sharpness, contrast, saturation, function)
or crop and then save this as a new TIFF or JPEG image.
我想 所有的 DC 只要能拍攝儲存 RAW檔案格式 都可以輸出RAW檔到PC
但您的PC 必須要有 支援RAW檔案格式 的編輯軟體 才能來編修
大部份支援RAW的DC 都有附limited edition軟體 像博士說的 功能有限
據說 RAW檔案粉大 要編修得好 並不是十分容易 要有經驗 主要用來印刷
至於這台 Olympus C-8080 Zoom 所號稱的 可以編修RAW檔案 有點誤導消費者
它提供在相機上 那個1.8吋的LCD Playback時 可修改 RAW的資料 或 crop...
然後重新儲存為 TIFF 或 JPEG檔案 聽起來不錯 但LCD實在太小 會很難...
英文參考:
One of the Playback menu options allows you to edit RAW image files.
Here you can alter the parameters (resolution, white balance, WB fine tune,
scene mode, sharpness, contrast, saturation, function)
or crop and then save this as a new TIFF or JPEG image.