DPReview.com is closing April 10th - Find out more

G9X raw vs jpeg interesting observation

Started Mar 24, 2018 | Discussions thread
ForumParentFirstPrevious
Flat view
Simon97
Simon97 Veteran Member • Posts: 3,443
G9X raw vs jpeg interesting observation
3

Below is the same exposure, one from jpeg, one from raw (raw+jpeg mode). The lens was set at wide zoom and f/2 aperture. Due to the compact design of this lens/camera, there is heavy barrel distortion that I left as is in the raw image. To correct for this, the in camera jpeg processing pulls the corners out to straighten the image. Doing so means some loss of angle of view as the image is stretched out into the corners. This stretching should be minimal at the top and bottom center but the camera still cuts off several rows of pixels there. If I correct the barrel distortion in RawTherapee, I don't lose nearly as much image along the center top and sides. This would mean I get a wider angle of view that I would than from the in camera jpegs. Because the image is stretched so much in the corners and still cut off along the sides and top and then the image is resized back to 20 mp, there would be some loss in sharpness, especially near the corners, although the part that is lost is really soft in the very corners of the raw due to the lens.

What I'm saying is, shooting in raw and correcting the distortion would leave you with a bit wider angle of view and a sharper image above what raw already offers. (images downsized 50% for uploading)

jpeg

raw, uncorrected distortion. I didn't try to make the exposure look the same as the jpeg.

raw with barrel distortion removed. Image is not as cropped as is the camera's jpeg.

 Simon97's gear list:Simon97's gear list
Canon PowerShot ELPH 360 HS Panasonic Lumix DC-G100
Canon G9 X
If you believe there are incorrect tags, please send us this post using our feedback form.
ForumParentFirstPrevious
Flat view
ForumParentFirstPrevious
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow