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I had been experimenting with creating some "prints" by laser cutting holes
instead of directly laser-engraving the image file, and came up with an
assortment of methods to experiment with.
The following is a straightforward halftone pattern where the hole size is
proportional to the darkness of the pixel at its center.
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Attachments:
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Preview of image 'manch1.png'
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Another.
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Attachments:
Download 'skull1.png' (858 KB)
Preview of image 'skull1.png'
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Another method I thought might speed up the cutting was overlaying a grid onto a
slice of a heightfield. Some details and contours are better preserved this
way, although some of the floating "islands" will end up as part of the waste.
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Attachments:
Download 'subtracted heightfield_hexagons.png' (450 KB)
Preview of image 'subtracted heightfield_hexagons.png'
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On 03/02/2017 12:33 PM, Bald Eagle wrote:
> Another.
>
Cool! I can imagine people replacing their home/office window and door
screens with versions having images made in this way... :-)
Bill P.
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William F Pokorny <ano### [at] anonymous org> wrote:
> Cool! I can imagine people replacing their home/office window and door
> screens with versions having images made in this way... :-)
>
> Bill P.
That was, to a degree, actually the idea - large screens in a convention area as
decoration / space dividers.
The huge number of holes and the large size made finding a faster way to
substantially achieve the same effect really critical.
There are some neat things one can do with dots / perforations, including
optical illusions such as animation from still images, etc.
Photographs work well if the hole resolution is high enough, and there are ways
to play with the "image processing" - applying functions to the rgb or gray
values before calculating the hole size.
I even managed to create holes using fonts, so for instance, a person's photo
could be 'rendered' using their monogram ...
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On 3/2/2017 5:28 PM, Bald Eagle wrote:
> I had been experimenting with creating some "prints" by laser cutting holes
> instead of directly laser-engraving the image file, and came up with an
> assortment of methods to experiment with.
>
> The following is a straightforward halftone pattern where the hole size is
> proportional to the darkness of the pixel at its center.
>
Oh! It reminds me of the old fashioned newspaper print photographs..
Nice.
--
Regards
Stephen
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On Thu, 02 Mar 2017 18:22:35 +0000, Stephen wrote:
> On 3/2/2017 5:28 PM, Bald Eagle wrote:
>> I had been experimenting with creating some "prints" by laser cutting
>> holes instead of directly laser-engraving the image file, and came up
>> with an assortment of methods to experiment with.
>>
>> The following is a straightforward halftone pattern where the hole size
>> is proportional to the darkness of the pixel at its center.
>>
>>
> Oh! It reminds me of the old fashioned newspaper print photographs..
>
> Nice.
That was my thought as well. Really like it. :)
Jim
--
"I learned long ago, never to wrestle with a pig. You get dirty, and
besides, the pig likes it." - George Bernard Shaw
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On 3/2/2017 6:24 PM, Jim Henderson wrote:
> On Thu, 02 Mar 2017 18:22:35 +0000, Stephen wrote:
>
>> On 3/2/2017 5:28 PM, Bald Eagle wrote:
>>> I had been experimenting with creating some "prints" by laser cutting
>>> holes instead of directly laser-engraving the image file, and came up
>>> with an assortment of methods to experiment with.
>>>
>>> The following is a straightforward halftone pattern where the hole size
>>> is proportional to the darkness of the pixel at its center.
>>>
>>>
>> Oh! It reminds me of the old fashioned newspaper print photographs..
>>
>> Nice.
>
> That was my thought as well. Really like it. :)
>
Yes so do I. And now it is retro artistic. :)
Actually a newsprint photo was the first thing I looked at with my
Christmas pocket microscope when I was about 10 y.o.
--
Regards
Stephen
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