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Steve on Image Processing with MATLAB

Image processing concepts, algorithms, and MATLAB

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Steve on Image Processing with MATLAB has been archived and will not be updated.

Posts 21 - 30 of 34

Results for: 2014

Under the hood of imread 14

I'm going to play a small trick on you today. Try reading in this JPEG file using imread:url = 'https://blogs.mathworks.com/images/steve/2014/peppers.jpg'; rgb = imread(url); imshow(rgb) So... read more >>

Parameterized software tests and DIPUM examples 5

The book Digital Image Processing Using MATLAB (DIPUM) contains 144 examples. I know this because I watch them all run in MATLAB at least a couple of times a year. I find watching all the... read more >>

MATLAB code in an unexpected place 5

The TV show "The Americans" is a show about Soviet Union secret agents pretending to be a normal American couple in 1981-82 or so. In the 2nd season's final episode, which I watched last... read more >>

Quantization issues when testing image processing code

Today I have for you an insider's view of a subtle aspect of testing image processing software (such as the Image Processing Toolbox!).I've written several times in this blog about testing software.... read more >>

Color Thresholder App in R2014a 7

I had way too much fun this morning playing with the new Color Thresholder app (new in R2014a) in the Image Processing Toolbox, so I wanted to show it to you. I've shown that picture... read more >>

Timing the FFT 3

I've seen two questions recently about the speed of the fft function in MATLAB. First, a tech support question was forwarded to development. The user wanted to know how to predict the computation... read more >>

Comparing the geometries of bwboundaries and poly2mask 5

MATLAB user Meshooo asked a question on MATLAB Answers about a problem with the createMask function associated with impoly. Meshooo observed a discrepancy between the output of bwboundaries and the... read more >>

roifill design critique 6

"Is there anything else you would like to tell us?"This was the question whose answer led me to revisit an old friend of mine, the roifill function. This is a function that smoothly fills a... read more >>

R2014a shipped! (And the developer says, “Wait, what?”) 11

At MathWorks, the software developers' sense of calendar time is SO out of sync with the real world. In the real world, MathWorks shipped R2014a, the first of our two annual releases, last week. In... read more >>

regionprops, tables, and struct2table 7

Today I was talking to Spandan (a regular guest blogger here) about the history of the Image Processing Toolbox function regionprops. This function is a widely-used work-horse of the toolbox. Many of... read more >>

Posts 21 - 30 of 34