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Apr
27
awarded  Nice Answer
Apr
26
answered Graph not plotting any points
Apr
25
comment Problem with ComponentMeasurements and property “Centroid”
Are you looking for IntensityCentroid instead of Centroid? Not everyone has images where intensity-weighted mean makes sense - think RGB images.
Apr
23
comment Fitting Stradivari's scroll
I thought the "oscillation" was because I missed the actual center point...
Apr
23
awarded  Nice Answer
Apr
22
comment Fitting Stradivari's scroll
I've added a linear fit. No idea if this can be constructed using ruler and compass.
Apr
22
revised Fitting Stradivari's scroll
added 764 characters in body
Apr
22
answered Fitting Stradivari's scroll
Apr
18
comment Why is inpainting worse in grayscale than in RGB image?
I hate it when people change the point of their question after they get an answer... Short version: You probably can't get the same result with a grayscale image that you get from and RGB image, because the color similarity information is lost.
Apr
18
answered Why is inpainting worse in grayscale than in RGB image?
Apr
18
comment Why is inpainting worse in grayscale than in RGB image?
Actually, it says "Inpaint operates separately on each color channel, except with the setting Method->"TextureSynthesis"."
Apr
14
comment Graphical Representation of Derivatives
I think what you're looking for is the en.wikipedia.org/wiki/Taylor_series
Apr
12
comment Transforming part of an image to a square
Related: mathematica.stackexchange.com/a/63897/242, mathematica.stackexchange.com/a/13922/242
Apr
12
comment Transforming part of an image to a square
FindGeometricTransform / ImagePerspectiveTransformation?
Apr
10
comment How to apply GradientFilter locally to an image?
+1. Suggestions: You could use Graphics to create the mask, instead of array manipulations. That way, you don't need the bounds checks and it's easier to change the mask shape (e.g Graphics[Disk[pt, radius], PlotRange -> Transpose[{{0, 0}, ImageDimensions[img]}], ImageSize -> ImageDimensions[img], Antialiasing -> False]). Also: Why not use LocatorPane?
Apr
9
answered How to get the Perfect Maching or Near-Perfect Matching
Apr
8
awarded  Nice Answer
Apr
8
revised How to count precisely proportion of some small pane in a electron microscope picture by it “Area”
edited body
Apr
8
answered How to count precisely proportion of some small pane in a electron microscope picture by it “Area”
Apr
7
comment Differing answers when comparing Wolfram Alpha and Mathematica v.10.2
Pure speculation: Maybe WA evaluates a^b as Exp[Log[a]*b]. That would give complex numbers in intermediate calculations, where the imaginary part doesn't perfectly cancel out due to numerical inaccuracy. Compare: Sum[Exp[Log[(-1.)]*(n + 1)]/n, {n, 1, 100000}] in Mathematica gives a complex result, too (though not the same...)