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Thread started 07 Sep 2016 (Wednesday) 13:53
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-= 5D Mark IV owners unite! Post photos and discuss.

 
digital ­ paradise
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Aug 01, 2017 12:16 |  #3346

Lbsimon wrote in post #18416398 (external link)
Thanks for posting the full original photo.

Following this logic, a 100 percent crop should mean 100 percent thrown away! Now I am even more confused...

What you say does make sense. I have always described it that way but I was never really sure it was correct and no one ever mentioned it. Maybe the forum experts can chime in.


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digital ­ paradise
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Aug 01, 2017 12:18 |  #3347

https://en.wikipedia.o​rg/wiki/Cropping_%28im​age%29 (external link)


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digital ­ paradise
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Aug 01, 2017 12:21 |  #3348

Lbsimon wrote in post #18416398 (external link)
Thanks for posting the full original photo.

Following this logic, a 100 percent crop should mean 100 percent thrown away! Now I am even more confused...

I read your post again and based on that link I posted.

In the printing, graphic design and photography industries, cropping[1] is the removal of unwanted areas from a photographic or illustrated image.


So it appears if you crop 100% then there will be nothing left. If you crop 90% then only 10% is left to view.


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smythie
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Aug 01, 2017 16:14 |  #3349

I've viewed it as 100% being a view at 100% zoom and e.g. 70% being a crop down to 70% zoom


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edmidlifecrisis
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Aug 01, 2017 20:24 |  #3350

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jcothron
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Aug 02, 2017 11:23 |  #3351

Something a little different for me. 61 images focus stacked, only minor cropping.


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Ascenta
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Aug 02, 2017 11:47 |  #3352

Very nice! 61 images!! I don't know anything about stacking, but would it look that much different if you used something like only 15 or 20?




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jcothron
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Aug 02, 2017 11:52 |  #3353

Ascenta wrote in post #18417360 (external link)
Very nice! 61 images!! I don't know anything about stacking, but would it look that much different if you used something like only 15 or 20?

I think it would actually, at this distance the DOF is extremely narrow. Having said that, I don't know that it NEEDED 61 images either. This is the first one I've ever attempted so to an extent I was just playing around with it to see what the result would be. I haven't done the calculations to know exactly how much stepping was needed. I may do it again lol. This is a new area for me.


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RodS57
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Aug 02, 2017 17:56 |  #3354

Lbsimon wrote in post #18416369 (external link)
I always get confused: Does "70% crop" mean 70 percent of the area is left, or 70% is thrown away?

And then there is option #3 which I use; Disregarding any really deep technical stuff:
My monitor is 1920x1080. I view my shots in a window not full screen. That window shows the full frame as being at 22% zoom level which I equate to percentage of actual size. I assume that if I zoom in to 50% then the portion of the shot I see is 50% actual size. So I say I cropped at 50%. This completely ignores how much I threw away or kept. I am assuming a one to one correspondence for picture pixels mapped to screen pixels when viewed at 100% which may not be a reality. Works for me anyway.

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>>> Pictures? What pictures? <<<<

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Lbsimon
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Aug 02, 2017 18:10 |  #3355

RodS57 wrote in post #18417721 (external link)
And then there is option #3 which I use; Disregarding any really deep technical stuff:
My monitor is 1920x1080. I view my shots in a window not full screen. That window shows the full frame as being at 22% zoom level which I equate to percentage of actual size. I assume that if I zoom in to 50% then the portion of the shot I see is 50% actual size. So I say I cropped at 50%. This completely ignores how much I threw away or kept. I am assuming a one to one correspondence for picture pixels mapped to screen pixels when viewed at 100% which may not be a reality. Works for me anyway.

Rod

This is not what is was asking about, and your option #3 will not help me. When I see a shot posted here, the poster says it is cropped 70 percent, I want to know how big the remaining image occupied on the uncropped image. Wiki, as somebody wrote here, says one thing. Some people here use the opposite meaning. I guess I will have to ask this question every time I see a posting and want to know what the original looked like.


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RodS57
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Aug 02, 2017 18:27 |  #3356

Lbsimon wrote in post #18417732 (external link)
This is not what is was asking about, and your option #3 will not help me. When I see a shot posted here, the poster says it is cropped 70 percent, I want to know how big the remaining image occupied on the uncropped image. Wiki, as somebody wrote here, says one thing. Some people here use the opposite meaning. I guess I will have to ask this question every time I see a posting and want to know what the original looked like.

I know. I think to get exactly what you want people would have to list post crop/pre-resize dimensions with picture when posted to the forum. I always resize to 1280xwhatever prior to posting and let the site software do any adjustments. Haven't looked at exif of posted pictures to see what is retained.

Rod


>>> Pictures? What pictures? <<<<

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Trout ­ Bum
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Aug 02, 2017 20:47 |  #3357

jcothron wrote in post #18417345 (external link)
Something a little different for me. 61 images focus stacked, only minor cropping.


What software?


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jcothron
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Aug 02, 2017 20:58 |  #3358

Trout Bum wrote in post #18417871 (external link)
What software?

Just Lr and Ps. Lr to edit tones, sharpening, etc and Ps for the stacking.


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davesrose
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Aug 02, 2017 21:17 |  #3359

Lbsimon wrote in post #18417732 (external link)
This is not what is was asking about, and your option #3 will not help me. When I see a shot posted here, the poster says it is cropped 70 percent, I want to know how big the remaining image occupied on the uncropped image. Wiki, as somebody wrote here, says one thing. Some people here use the opposite meaning. I guess I will have to ask this question every time I see a posting and want to know what the original looked like.

I'm with you.....you can't base percentages on your own monitor: especially these days with monitor resolutions and print dimensions being so varied. As someone who's profession is graphics and web development, for a statement of "my image is cropped 70 percent": I take that to mean 30% of the image is remaining. If the statement was "I cropped in to 70%", then I'd take that to mean 30% of the image was discarded. My basis is always 100% of source resolution: makes more sense since I then know what to work with for intended output size (and how much scaling/ppi/dpi there is).


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Aug 02, 2017 22:11 |  #3360

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