Tack Sharp Photos
Nov 22, 2020 11:45:52 #
tca2267
Loc: Florida
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
Nov 22, 2020 11:47:26 #
tca2267 wrote:
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I check them when I take them by magnifying the image on my LCD screen.
Nov 22, 2020 11:51:57 #
RWR
Loc: La Mesa, CA
tca2267 wrote:
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I view mine on a light box with a 20X loupe. That works out best for me.
Nov 22, 2020 11:57:19 #
I find a sharp edge in the photo. I then take the photo and load it into a numeric array in Python using luminance values. Find the sharp edge in the photo and select a sequence of points that goes over that edge. I then take the first derivative of the numbers going across the edge which should yield a peak (could be either positive or negative). I fit the peak to a Gaussian curve to find the width of the curve. A sharp edge will have a curve with a narrow width. Tack sharp would be a width close to 1.0 (the pixel spacing).
Nov 22, 2020 12:02:46 #
tca2267 wrote:
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
Yes, the 1:1 (aka 1 to 1) pixel level view of the image. Also know as the 100% zoom.
Nov 22, 2020 12:06:29 #
I couldn't think of a better way. If they look sharp at 100% what more do you need?
--Bob
--Bob
tca2267 wrote:
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
Nov 22, 2020 12:10:36 #
Coincidence! I just viewed this video. Not exactly on topic, but related. Steve Perry secrets for sharper wildlife photos...
https://youtu.be/TLe6mXjFRdA
https://youtu.be/TLe6mXjFRdA
Nov 22, 2020 12:10:36 #
DirtFarmer wrote:
I find a sharp edge in the photo. I then take the ... (show quote)
Very clever approach to determine an indeterminate solution.
Nov 22, 2020 12:14:53 #
If you use Photoshop, under the select menu there are some options, for example select focus which has a slider to select anything from extreme sharp focus to soft focus.
Nov 22, 2020 13:10:03 #
CHG_CANON wrote:
Yes, the 1:1 (aka 1 to 1) pixel level view of the image. Also know as the 100% zoom.
Nov 22, 2020 13:28:10 #
The linked post talked about the 'how' for sharp images. The examples in the first reply show the 1:1 analysis, provided as DDL attachments.
How to obtain sharp images in digital photography
How to obtain sharp images in digital photography
Nov 22, 2020 13:33:08 #
I rather like that approach. But, that's the engineer side of me.
--Bob
--Bob
DirtFarmer wrote:
I find a sharp edge in the photo. I then take the ... (show quote)
Nov 22, 2020 13:35:16 #
tca2267 wrote:
....I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
if a photo is "tack sharp?"....
That's the best way to do sharpening and denoise because it's the best level for optimising sharpness and noise removal. Rather than thinking about whether a photo is tack sharp or not you should concentrate on optimising what you have, regardless of whether it falls into the category of "tack sharp" or not. What matters most is what it looks like at normal viewing distance, and if you've optimised it at 100% you'll know it's as good as it can be.
Nov 22, 2020 13:37:04 #
Applicable to LR, PS, PSE and all software that used similar terminology:
Basics of Lightroom Sharpening
Basics of Lightroom Sharpening
Nov 22, 2020 13:38:09 #
CHG_CANON wrote:
The linked post talked about the 'how' for sharp images. The examples in the first reply show the 1:1 analysis, provided as DDL attachments.
How to obtain sharp images in digital photography
How to obtain sharp images in digital photography
Nice presentation!
Very similar to Perry's list. Great minds.... He adds shutter speed awareness or maybe I glossed over that part of your laundry list.
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