Unsuccessful in making circular pattern based on image contrasts

Replies to This Discussion

Permalink Reply by MARIO VERGARA on February 23, 2017 at 10:14am

hi

you need to reparametrize your surface

also

change your u and v values higher

best

Permalink Reply by Joseph Oster on February 23, 2017 at 10:59am

You'll have better luck if you post your Grasshopper code here and, separately, the image you are using for the Image Sampler'.

Permalink Reply by archz2 on February 24, 2017 at 1:13am

Here are the files that are being used. 

Attachments:

• nitin face divisioning tries.gh, 177 KB
• NITINAA.png, 1.5 MB

Permalink Reply by Joseph Oster on February 24, 2017 at 7:53am

As noted by MARIO, you need to need to reparameterize your surface.  It would also be helpful to internalize your surface in the GH file (or create it with GH).

Then you need to convert the color value output of 'Image Sampler' to a more useful one for radius of the circles.  'Split AHSV' is good for that.

Finally, I changed the 'B' slider from Integer to Real, allowing fractions.

Attachments:

• nitinfacedivisioningtries_2017Feb24a.gh, 11 KB

Permalink Reply by Joseph Oster on February 24, 2017 at 9:48am

I want circles to fill in the black areas

Or... more specific to your question - multiply the 'A (Alpha)' output by 1 - 'V (Brightness)', and increase the resolution:

Attachments:

• nitinfacedivisioningtries_2017Feb24b.gh, 180 KB

Permalink Reply by Joseph Oster on February 24, 2017 at 9:59am

Resolution increased further to 120 and code added to filter out circles with zero radius (purple group):

Attachments:

• nitinfacedivisioningtries_2017Feb24c.gh, 184 KB

Permalink Reply by archz2 on February 24, 2017 at 9:26pm

Thanks a lot for helping me out!

How can I do this?

If I increase the circles' radii, the number of circles automatically adjust so that the final output resembles the image?

Permalink Reply by Joseph Oster on February 24, 2017 at 11:42pm

If you don't want the circles to overlap, you will need to decrease the resolution when you increase the radii.  Higher resolution looks better.  Have fun.