Sony NEX ARW missed pixel columns

[Nick Fedosyeyev]

Original Sony NEX 5R ARW files are 4928*3276.
After loading them into PI they become 4920*3276. Columns on the right are missed.

[msmythers]

I'm pretty sure this is a DCRAW issue. That is what the DSLR_Raw module is built on. I use 2 original Nex-5's and I have the opposite happen. In the Sony image software it reports my images as 4592x3056 yet PI has 4608x3072. Which is strictly correct I'm not sure but to be honest I don't care. That small change is not effecting my image that I can tell. I run all my calibration through PI so bias, darks, flats and lights have the same dimensions within the program.



Mike

 

[Nick Fedosyeyev]

Just FYI:

DCRAW tells 4928*3276. PI tells size is 8 bit narrower.

>dcraw.exe -i -v C:\Astro\DSC05995.ARW
Filename: C:\Astro\DSC05995.ARW
Timestamp: Tue Dec 24 23:36:27 2013
Camera: SONY NEX-5R
ISO speed: 1600
Shutter: 4.0 sec
Aperture: f/0.0
Focal length: 0.0 mm
Embedded ICC profile: no
Number of raw images: 1
Thumb size:  1616 x 1080
Full size:   4928 x 3276
Image size:  4928 x 3276
Output size: 4928 x 3276
Raw colors: 3
Filter pattern: RGGBRGGBRGGBRGGB
Daylight multipliers: 2.614211 0.926724 1.255255

[msmythers]

If you look at official Sony specs for your camera the image resolution for the 5R at 16MP(3:2) is 4912 x 3264. That is less then either DCRAW or PI is reporting for you. That's why I say I don't know which is correct.



Mike

[Juan Conejero]

Do you have the No image crop option disabled on DSLR RAW Preferences? Probably these 8 columns of pixels are a unused sensor area, which is being cropped automatically because that option is disabled. Try enabling it.

If you look at official Sony specs for your camera the image resolution for the 5R at 16MP(3:2) is 4912 x 3264.

DCRAW is mostly based on reverse engineering to decode proprietary raw camera formats, since unfortunately most (all?) camera manufacturers never publish their raw format specifications. Hence this difference is not surprising. What dcraw is reporting is the actual physical resolution of the camera sensor.

[msmythers]

Hi Juan

I just tried the 'No Crop' selection. With it checked or not I get the same results. Like I said, for myself it doesn't bother me.


Mike