Today I want to wrap up (for now) my series on multiresolution pyramids by showing you how to make this strange-looking fruit: This a slightly nontraditional demonstration of a technique... 続きを読む >>
Multiresolution pyramids part 4: Image blending 1
Steve on Image Processing with MATLABImage processing concepts, algorithms, and MATLAB
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Changes to SUM and DIM 3
Does this line of code make you raise your eyebrows in puzzlement?c = sum(A,[1 2]) If so, you are likely an experienced MATLAB user who does not make a habit of carefully studying the release notes,... 続きを読む >>
Multiresolution pyramids part 3: Laplacian pyramids
In my April 2 post, I introduced multiresolution pyramids, and I explained my dissatisfaction with the function impyramid, which (sadly) I designed. (Aside: I had that post ready to go on April 1,... 続きを読む >>
Multiresolution image pyramids and impyramid – part 2
Last time, I talked about the function impyramid and how I have been dissatisfied with it. (Confession: I designed it.) Today I want to present an alternative approach to creating a multiresolution... 続きを読む >>
Multiresolution image pyramids and impyramid – part 1 4
There's a function in the Image Processing Toolbox that I'm not especially fond of: impyramid.I shouldn't tell you who designed this function, but I'll give you a hint: his initials are "Steve... 続きを読む >>
A new image tiling function in MATLAB 2
I was noodling around recently with a future blog topic (multiresolution pyramids; stay tuned) when I was reminded of a recent addition to MATLAB: the function imtile, introduced in R2018b.This... 続きを読む >>
Converting from sRGB to SWOP CMYK 2
An Image Processing Toolbox user recently reported to us good results for using makecform and applycform to convert colors from sRGB to CMYK. Here's the code they used:c =... 続きを読む >>
Making your plot lines thicker 9
Today's blog post is dedicated to everyone whose eyes aren't as young as they used to be.In last week's blog post on pursuit curves, I showed this figure: If you ran my code exactly as I posted it,... 続きを読む >>
Pursuit Curves 2
Here's an interesting snippet I learned while working on today's blog post: Mathematician Jacob Bernoulli asked for a logarithmic spiral to be engraved on his tombstone. Here's an example of a such a... 続きを読む >>
Animated PNG (APNG) Files 6
Update: See my 20-Dec-2019 post for how to write APNG files from MATLAB. Have you heard of animated PNG (APNG) files? Are you interested in creating them from MATLAB? They are supposed to be... 続きを読む >>