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Jan
30
comment Grayscale Morphology
This link might be useful talking about Binary and Grayscale Morphological Operators... mathematica-journal.com/issue/v8i1/features/jankowski/contents/…
Jan
28
comment Grid cuts my images
Removing ImageCrop works correctly... Strangely magnifying bigger than 1 also corrects it...
Jan
21
comment Using 2 D FFT for filtering unwanted texture on an image
did you see related question mathematica.stackexchange.com/questions/29265/… ? you can try data = InverseFourier[fdct]; Image[Chop@data] you need to chop it. the inverse Fourier may have imaginary parts.
Jan
19
comment Splitting a rasterized image into its squares
you may also check 'ImagePartition'. i = Import["ExampleData/lena.tif"] ImagePartition[i, {45}] // Grid
Dec
11
comment Why is DiscretizeGraphics missing points on my curve?
Yes, I think here is a bug in DiscretizeGraphics algorithm skips the last segment.
Dec
11
comment Why is DiscretizeGraphics missing points on my curve?
For the first part you can use pts = {{.5, 0}, {1, 0}, {1, 1}, {.5, 1}, {0, 1}, {0, 0}}; Graphics@BSplineCurve[pts, SplineClosed -> True] so that you don,'t need to duplicate the first or last point. There is a bug I thing in DiscretizeGraphics. It forgets to ckeck if the shape is closed. And algorithm skips the last segment.
Dec
9
comment Why is DiscretizeGraphics missing points on my curve?
I don't now the exact answer but my guess is the problem is with line and BSplineCurve combination. The line is bounded piece wise linear primitive and BSplineCurve is a nonlinear primitive with an only approximation represented. If you try BoundaryDiscretizeGraphics you get an error saying 'BoundaryMeshRegion::buncl: At least one boundary was not closed in'. So the line and spline joined points does not overlap due to approximation of spline.
Nov
16
awarded  Nice Answer
Nov
16
comment find the maximum number of not intersecting circles inside an ellipse
v10 but you should add sel // Colorize
Nov
16
answered find the maximum number of not intersecting circles inside an ellipse
Nov
16
comment Detecting an ellipse in a glaucoma photo
You may also check this answer for ellipse fitting. mathematica.stackexchange.com/questions/25589/…
Nov
16
answered Detecting an ellipse in a glaucoma photo
Oct
23
comment How to patch fingerprint ridges
In literature I think it's called fingerprint ridges... In Mathematica docs you may search GradientOrientationFilter and example/VisualizeTheGradientDirection. Also the answer of @belisarius is forth for this Q might be helpful using hit and miss transform... mathematica.stackexchange.com/questions/19546/…
Oct
21
comment Multiple Import and Export of Images
Related post see - mathematica.stackexchange.com/questions/43709/…
Oct
12
awarded  Popular Question
Sep
28
comment Removing gutter shadows from scanned pages
Also related links: mathematica.stackexchange.com/questions/77177/… and mathematica.stackexchange.com/questions/32114/…
Sep
28
comment Removing gutter shadows from scanned pages
if you have mathematica 10.0. you may try RemoveBackground[img, {"Background", {LightYellow, 0.5}}]
Sep
22
comment Challenge: deblurring images
might be interesting library.wolfram.com/infocenter/MathSource/5548
Sep
22
revised Image Processing: Car front detection
added angle correction
Sep
18
revised Image Processing: Car front detection
improved example code