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Mar
5
comment Can I split an image into subparts automatically?
Look up ComponentMeasurements and ImageTrim in the documentation.
Mar
2
comment Is the Method -> Automatic option for Classify not deterministic?
I'm guessing that Automatic actually tries multiple classifiers and chooses the best one, according to some criteria. And since some learners like random forests and neural networks aren't deterministic, that could lead to different results. I would be curious if anyone knows more about how Automatic works, though.
Feb
29
comment Determining the coordinates of the BoundingBox of an object in an image
Use ImageTrim instead of ImageTake. ImageTrim takes coordinates, while ImageTake takes indices.
Feb
24
comment Calculate area of black sea from image
If you measure the length of the yellow line, it should be pixelCount * (Quantity[100,"Kilometers"] / lengthOfYellowLine)^2. But don't expect good accuracy, since the yellow line is relatively short.
Feb
22
awarded  Enlightened
Feb
22
awarded  Nice Answer
Feb
19
comment Calculation of 2D FFT for an image
Or Image[Rescale[Arg[fft]]]. Not sure what you expect to see in it, though
Feb
18
comment Speeding up ImageData[image,“Byte”]
Call libpng using LibraryLink? I doubt you can improve the performance of Import and Flatten unless you rewrite most of the functionality...
Feb
18
comment Speeding up ImageData[image,“Byte”]
You could use Import[..., "Data"] to import the image as a packed integer array instead of an Image. That would get rid of the ImageData call and the conversion to/from floating point. But Flatten still takes a few milliseconds. Not sure if you can improve that...
Feb
14
awarded  Enlightened
Feb
14
awarded  Nice Answer
Feb
13
awarded  Necromancer
Feb
13
awarded  Revival
Feb
13
answered How to count proportion of two phase in a electron microscope picture
Feb
13
comment Counting number of tubes in an image
Yes, but you want to change the x-coordinate in relation to the y-coordinate, and you want the singularity to be at y==vy, not y==0. So I think you need DataRange -> {{-vx, w - vx}, {0, h}-vy} (not tested)
Feb
13
comment Counting number of tubes in an image
Your ImageTransformation isn't using vy at all? That can't be right...
Feb
13
awarded  Enlightened
Feb
13
awarded  Nice Answer
Feb
9
awarded  Nice Answer
Feb
9
awarded  Nice Answer