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10h
comment Using FindFit to return a list of possible best fits
A single example of the generic class would be better than nothing! Without one, anyone wanting to help you must first invent a function and some data which exhibits this issue with FindFit. People are less likely to tackle your problem if they have to invest extra time just to get started.
1d
comment Raster to Image conversion problem
+1 A nice bit of detective work. I think you are correct about the optimisation. If you set SetSystemOptions["ImageProcessingOptions" -> {"Verbose" -> True}] you get some debug output referring to "fast conversion".
Oct
27
reviewed Leave Open Importing data from files designated in an InputString dialog box
Oct
27
comment how to speedup subpixel registration
To extract the transformation directly from ImageAlign, use the secret option ImageAlign[i0, small, "FindGeometricTransformOutputQ" -> True]
Oct
27
comment I'm trying to make an internet radio alarm clock
@belisarius, ah okay. I didn't know that. Sorry for the false hope, user12876
Oct
26
comment I'm trying to make an internet radio alarm clock
Have you seen RunScheduledTask ?
Oct
26
comment Findfit doesn't provide reasonable results when fitting a complex function
This question appears to be off-topic because the fit found by FindFit is perfectly reasonable
Oct
26
comment FindFaces: how to improve the results of the face recognition feature
@user15961, it's very strange. I'm sorry but I have no clue what could be causing it! There should be no difference between using the Automatic option and explicitly specifying the same file.
Oct
26
comment FindFaces: how to improve the results of the face recognition feature
@user15961, what does this give? Cases[DownValues @ Image`PatternRecognitionDump`ffOpenCV, _FileNameJoin, -1]
Oct
26
comment FindFaces: how to improve the results of the face recognition feature
@user15961, I'm not sure. Does the file exist at that location?
Oct
26
reviewed Approve suggested edit on Convert imaginary exponentials to goniometric expressions
Oct
26
comment OpenCL_result not the same as that in the example-Julia
I get the same problem. There is also an error: "OpenCLLink experienced an internal error." This is on Windows 7 with an Nvidia GTX 550Ti graphics card. The compilation goes okay so I suspect a driver bug or perhaps the GPU's double precision support isn't up to scratch.
Oct
26
reviewed Close how to solve a differential equation
Oct
26
reviewed Close Solving/simplifying a trig function
Oct
26
reviewed Leave Closed Mathematica 10 is shuttingdown many times
Oct
25
comment Can Listplot output data to an image whilst leaving axes and labels as vectors?
The linked question deals with 3D graphics, but I think halirutan's solution should adapt easily to ListPlot
Oct
25
comment FindFaces: how to improve the results of the face recognition feature
@bobthechemist, here is the complete course: Use this, plus trial and error ;-)
Oct
25
comment Can I get features edge(face outline, mouth, nose, eyes, etc.) after clicking on edge points in an image?
For example Lena's nose has a bright stripe down the front. Your algorithm needs to draw a line along the right hand side of the stripe (because it's the real edge of her nose) but not along the left hand side (because that's an illumination effect caused by the shape of the nose). IMO you either need a very complex algorithm, or to supply so many manually selected points that you might as well just trace the outlines by hand.
Oct
25
comment Can I get features edge(face outline, mouth, nose, eyes, etc.) after clicking on edge points in an image?
Yes, you could try isolating the lines from EdgeDetect which are close to the points you selected. I think you will still be a long way from the result you desire though. There is a fundamental difficulty in telling apart the edges caused by illumination changes and the "real" feature edges.
Oct
24
comment Can I get features edge(face outline, mouth, nose, eyes, etc.) after clicking on edge points in an image?
I don't think you will find a simple algorithm to do this. You might be interested in this answer where I show how to extend FindFaces to detect specific facial features.