jonal928
Well-known
raid
Dad Photographer
The colors and the images as a whole are wonderful. Thanks for all the posted images here. I have never used such a camera.
jonal928
Well-known
Thanks Raid, it's never too late to start experimenting with such a camera.
_SDI0074 S8 new by Jeri Leibovits, on Flickr**
jonal928
Well-known
jonal928
Well-known
jonal928
Well-known
Sigma DP2 Merrill
_SDI0717 S4 by Jeri Leibovits, on Flickr
_SDI0696 S2 by Jeri Leibovits, on Flickr
_SDI0698 S2 by Jeri Leibovits, on Flickr
**
_SDI0717 S4 by Jeri Leibovits, on Flickr_SDI0696 S2 by Jeri Leibovits, on Flickr_SDI0698 S2 by Jeri Leibovits, on Flickr**
jonal928
Well-known
furtle
Member
The Black Poplar trees are flowering in our neck of the woods. Can but try and get a snap with my arms stretched out above my head.
jonal928
Well-known
rhl-oregon
Cameras Guitars Wonders
DP2M
rhl-oregon
Cameras Guitars Wonders
rhl-oregon
Cameras Guitars Wonders
rhl-oregon
Cameras Guitars Wonders
halvmesyr
Established
I used to have (transparent) tape on my dp2 merrill screen to be able to frame 4x3 shots:
jonal928
Well-known
Keith
The best camera is one that still works!
jonal928
Well-known
D
Deleted member 82967
Guest
It seemed a bit soft for a Merrill and I wondered where the focus was ...
... so I did an edge-detect followed by a threshold filter in the GIMP, voila:
I'm not real sure that edge detection shows the focal plane that well but it's kind of like Contrast Detection AF which the DP Merrill uses, IMHO.
... so I did an edge-detect followed by a threshold filter in the GIMP, voila:
I'm not real sure that edge detection shows the focal plane that well but it's kind of like Contrast Detection AF which the DP Merrill uses, IMHO.
Makes me so happy to see an edge detection image here.
I wrote my first edge detection code over 40 years ago. It ran on an $8M supercomputer.
I wrote my first edge detection code over 40 years ago. It ran on an $8M supercomputer.
D
Deleted member 82967
Guest
Certainly an interesting subject especially with respect to focus position or depth thereof.
I'm leery, in Jeri's image, that the focus plane is perhaps not the treetops as implied - because of the big difference in local contrast between the top and bottom of the frame.
Of the various common methods (Canny, Sobel, Laplace, Gaussian difference, et al) do you prefer any with reference to image focus measurement?
Your code will probably run quite well on my cellphone ...
