Simple Crop for Posting

Started by Fordprefect, February 05, 2015, 12:24:54 PM

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Fordprefect

The "Simple Crop" for posting walk through.
Based on the premise that you can take a well lit focused image that has been taken at 90 degrees and parrallel with coin.

To achieve the desired end result you Must set the camera at it's
highest level of pixel capture and Finest setting.
Use every pixel available in your camera.

Fill your camera sensor with as much of the coin as you can, just don't
comprimise the lighting of the coin.

Each step of cropping and resizing removes and sometimes degrades
the image that you wish to post.
Start with heaps of mega pixels and the end result will be o'k, you cannot add real pixels after they have been removed.

Resizing, if needed is the final step, and I Stress "If Needed".

The image used below was captured on a Canon Powershot SX130 point & shoot set to capture at 4000X3000 at it's finest setting, the camera has Auto Select Macro.

*Crop the coin image from the original image capture.*
(Software to do this is your choice, I use Photoscape)

This is the full image as captured
Crop from original Full Image




The cropped image size for this 1951 1/2d is 1185X1185 is quite acceptable for posting.
(The Forum software will reduce the image size to display on end users display)

Upload to you Gallery or Image host and link to your post.
Done. :yahoo:

Rob the Elder

stevo1962

That's what I was doing with mine Rob by setting the phone camera to maximum and uploading
through the gallery but they obviously aren't too good on some peoples screens
It\'s not about who you know it\'s about what you know

Unicorn

Excellent work FP ..... that's sure to make everyone's pics the cream of the crop!!!

(Yes, another slow day in the Vale).

Fulvio

As with most things, the goal determines the path to get there. :angel:

For general work, including coin images, the first step i take is to save images at 75% JPEG compression. The result is normally indistinguishable from what came out of the camera, and the saving can be as much as 5/6th of the original bandwidth and space requirements.

However, if the absolute highest quality is required, say for print publication, all editing should be done in RAW mode if the camera supports it. The file sizes are enormous, but every pixel will remain intact. If the output needs to be a JPEG, that should be the very last step, after all editing is complete.
http://fulvio55.altervista.org/ - Decimal Mintages and Polymer Notes PDFs
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Fordprefect

Quote from: 'Fulvio' pid='66522' dateline='1423110695'For general work, including coin images, the first step i take is to save images at 75% JPEG compression. The result is normally indistinguishable from what came out of the camera, and the saving can be as much as 5/6th of the original bandwidth and space requirements.
For casual forum upload maybe, though 75% is a bit high.

For grading purposes, for what this was scribed, any further compression
to the original is to be avoided, the original JPEG is already compressed.

People do not add further compression to your images that you are posting for grading purpose's.
Rob the Elder

JeffH

I have found that an image no larger than 1499 pixels wide displays on my monitor (1680x1050 pixel resolution), from the gallery, without being shrunk down on screen.
So, unless absolute highest quality is required, I shrink images to a little less than that before uploading.
As Fulvio mentions, substantial reduction in file size. I select "High quality/Low compression" in Picture Publisher to retain as much quality as possible -never tried low quality/high compression option but suspect it would not be good.
Thinking is dangerous, it makes you think. That\'s why many people avoid it.

markn

Images posted in the forum will resize to fit your screen.  Images viewed in the gallery will not.
Founder: Australian Coin Forum
The Australian Coin Collecting Blog

Fulvio

Quote from: 'JeffH' pid='66526' dateline='1423115763'I shrink images to a little less than that before uploading.

I learnt a harsh lesson about 20 years ago...

Back when floppies were the go, and a 14" screen was gigantic, I used to cut things down dramatically. Everything got resized to 421 pixels high, because that was my viewable area.

Fast forward a few years, and with much larger displays, those old images were absolute crap.

So now I keep the original (albeit at the aforementioned 75%, because they're only ever going to be viewed onscreen anyway), and only ever work on copies.

A lesson learnt about 20,000 images too late. :(
http://fulvio55.altervista.org/ - Decimal Mintages and Polymer Notes PDFs
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