5
$\begingroup$

How to get sharp pixel boundaries with Texture? I'd like to have only black/white in the example below, no gray. 

a := Image[Table[If[EvenQ[x + y], 1, 0], {x, 50}, {y, 50}]];
Graphics[{Texture[a],
  Polygon[{{1, 0}, {0, Sqrt[3]}, {-1, 0}}, 
   VertexTextureCoordinates -> {{1, 0}, {0.5, 1}, {0, 0}}]}, ImageSize -> 200]

enter image description here

Improve this question
$\endgroup$

1 Answer 1

Reset to default
7
$\begingroup$

Not too hard.

a = Image[Table[If[EvenQ[x + y], 1, 0], {x, 50}, {y, 50}], ImageSize -> Large];

Graphics[{Texture[a], Polygon[{{1, 0}, {0, Sqrt[3]}, {-1, 0}},
                              VertexTextureCoordinates -> {{1, 0}, {0.5, 1}, {0, 0}}]}]

textured triangle

Improve this answer
$\endgroup$
10
  • $\begingroup$ That's much better, thank you. On a PDF export, still have gray transitions, however. Do you know if this is avoidable? $\endgroup$
    – u17
    May 18, 2013 at 16:29
  • $\begingroup$ Ah, that I don't know about. Could you mention what version and OS are you on, to help with the diagnosis? $\endgroup$
    – J. M.'s lack of A.I. ♦
    May 18, 2013 at 16:33
  • 1
    $\begingroup$ Mathematica 9.0.1.0 on Windows 8, 64-bit $\endgroup$
    – u17
    May 18, 2013 at 16:34
  • $\begingroup$ Hmm... do you also get the gray transitions if you export a as a PDF? $\endgroup$
    – J. M.'s lack of A.I. ♦
    May 18, 2013 at 16:36
  • 1
    $\begingroup$ @bobthechemist: For B/W, yes, although I have not measured if now either black or white pixels appear larger. On color images, it does not work. I think, it's a fundamental issue with the way Texture is implemented. I'd love it if there was an option like Resampling -> "Nearest" in ImageResize for Texture. $\endgroup$
    – u17
    May 18, 2013 at 17:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.