Legacy ImageMagick Discussions Archive

Glad to be of use. Thanks.

I'm using: ImageMagick-6.7.3-0-Q16-windows-dll

On a laptop (2GB memory) this command line:

convert -size 4500x3500 xc: +noise Poisson OUT.JPG

took 2 minutes 10 seconds. This seems excessive. Am I wrong?


Thanks.

I should apologise for the above remarks; they sound more than a little snotty. I'm aware that the developers don't want a buggy piece of software any more than I do - so sorry, and thanks for the help.


D.

I know it has nothing to do with -distort Polar -1. I know that because the dropouts are linear - doh! I was pointing out that the tosh about -sparse-color was irrelevant since -distort Polar -1 came after it. The gen on OpenMP was at least germane. I'll bear it in mind.


D.

This thread seems to be wandering off topic. What does the number of parameters passed to -sparse-color have to do with the possible dropout bug? The -sparse-color command works correctly according to the documentation. Even if it didn't I doubt any inconsistencies in the drawing of the gradient ...

Hi.

I gave my IM version - in red - above: ImageMagick-6.7.2-1-Q16-windows-dll

-sparse-color Barycentric only requires two parameters to generate the third automatically. To quote your docs:

Two Point Gradients
If only two color points are given, IM will generate the third point for you, so ...

Hi, again.

I've checked the libjpeg version: it's 8, which is up-to-date I think.

Translating JPG > PNG still gives dropouts

Translating PNG > PNG doesn't appear to generate dropouts but since the dropouts don't show every time it's difficult to know whether that's any kind of fix or clue to the ...

Version: ImageMagick-6.7.2-1-Q16-windows-dll

Hi, fmw42. Thanks for the response.

First, any jpeg will do for testing.

No, it doesn't fail consistently - sometimes the lines are there, sometimes not. But the lines are consistent - always about that length, and always in the top half. (As far as ...

Hi.

There's a topic below about dropouts - it has an unhelpful title which is why this is a new topic.

While I've been generating faux lenticular vignetting using the code below; dropouts are appearing in some - not all - output images. All the dropouts seem to be identical; and all are confined ...