Category Archives: Tutorials

Performance of demosaicing

 

camera file sensor size decoding ipad 4 ipad 3 ipad mini ipad 1
Nikon D800 NEF 36,3 M°
7424 x 4924
1/2 – rapide  7″320 15″728 N/A
1/1 – fin 31″755 N/A N/A
Nikon D7100 NEF 24,1 M°
6036 x 4020
1/2 – rapide 4″714 10″070 15″185
1/1 – fin 21″444 46″703 N/A
Leica M (240) DNG 24 M°
5984 x 4000
1/2 – rapide 6″001 8″495 13″244
1/1 – fin 26″312 47″313 N/A
Canon 5D MIII CR2 22,3 M°
5760 x 3840
1/2 – rapide 6″387 14″791 23″082
1/1 – fin  22″253 48″360 N/A
Leica M9 DNG 18 M°
5216 x 3472
1/2 – rapide 2″415 7″320 10″993
1/1 – fin 15″381 36″206 N/A
Sony NEX-6 ARW 16 M°
4928 x 3276
1/2 – rapide  2″160 4″743 6″709
1/1 – fin 14″805 30″379 N/A
Fujifilm X100 RAF 12,3 M°
4288 x 2848
1/2 – rapide  1″778 4″067 6″162
1/1 – fin 11″785 23″748 N/A
Nikon D300s NEF 12,3 M°
4288 x 2848
1/2 – rapide 2″520 5″295 7″301
1/1 – fin 12″255 24″738 N/A
Fuji X20 RAF 12 M° (X-Trans)
4000 x 3000
1/2 – rapide 1″943 4″438 10″092
1/1 – fin 52″567 1’23″646 N/A
Canon 350D CR2 8 M°
3456 x 2304
1/2 – rapide 2″372 5″212 6″807
1/1 – fin 8″334 17″473 30″212
Nikon D70 NEF 6,1 M°
3040 x 2014
1/2 – rapide 1″284 2″567 3″448
1/1 – fin 5″778 11″688 18″584

Mesured with ePhotoTag 1.3
ePhotoTag uses dcraw, Dave Coffin’s raw photo decoder.

Using a Eye-Fi card

Eye-Fi Pro-X2_16GBThe Eye-Fi ® card is a SD memory card with an WiFi transceiver. Your camera, so equipped, can then send photos directly to a computer, a phone or a tablet.

The latest “PRO X2″ models can send RAW files as well JPEG files ;  the 16 GB model is also faster since it is class 10 (the ohers being class 6).

The configuration is simple and fast, but requires the use of a computer (Mac or PC) to run the dedicated software. The Eye-Fi card comes with a USB adapter.

On the iPad, you must install the Eye-Fi app and remain it active to receive all photos taken with the camera equipped with the card. The photos received are stored in the “camera roll” album and therefore available to all applications and especially ePhotoTag !

Since version 1.3 ePhotoTag can receive photos directly issued by the Eye-Fi Pro card installed in your camera. To do this you must enable this feature in the ‘Settings’ menu ePhotoTag and enter the 32 character identifier called ‘uploadkey’ that is unique to this card.

You will find the identifier ‘uploadkey’ of your Eye-Fi Pro card on your computer: :
- for Mac in the user’s Library : ~/Library/Eye-Fi/Settings.xml
- for Windows 7 in C:\Users\[user]\AppData\Roaming\Eye-Fi\Settings.xml , where [user] is your login name.
- for Windows XP in C:\Documents and Settings\[user]\Application Data\Eye-Fi\Settings.xml where [user] is your login name.

Open the file ‘Settings.xml’ with notepad or textedit and you should find something like :
<Cards>
<Card MacAddress=”e4-8c-7f-99-33-b4″>
<UploadKey>f92a5853c1dc5a83034d1a318279d8a2</UploadKey>

NB : for Mac, if you can’t find  ~/Library, open the terminal and enter the command “chflags nohidden Library”.

NB2 : if the file ‘Settings.xml’ doesn’t show the <UploadKey> string, you have to use first your Eye-Fi card with your computer.

Import your photos within your iPad

You have a camera and an iPad. You need an adapter.

The adapter depends on what you want to do because there are two possibilities. Either you connect the camera to the iPad, or you remove the SD card from your camera and plug it on the iPad. I prefer the latest solution because you save the camera’s battery.

Here are the different models available from Apple (the first for iPad 1, 2 and 3, the last two models for iPad 4 and iPad mini with ‘lightning’ connector):

Connect everything and wait! Your iPad displays a list of images contained in the card or in the camera.

Select the photos you want to import and click OK.

For optimal performance when working in RAW, set your camera to produce also JPEG on a secondary card and only import those files. You can then merge the changes stored in XMP sidecar files with your original RAW files.

Then go on ePhotoTag !