Steve on Image Processing

Concepts, algorithms & MATLAB

Problem complexity

Posted by Steve Eddins,

Twice in the last month, I have read comments about certain problems being intrinsically hard to solve.... read more >>

Pausing MATLAB (R2016a) 3

Posted by Steve Eddins,

MATLAB R2016a shipped earlier this month. It has a new feature that is a personal favorite: the Pause button.... read more >>

MATLAB image display – autoscaling values with imshow 2

Posted by Steve Eddins,

imshow_scaling_02

Last week I talked about displaying gray-scale and binary images. In that post, I showed how to control the grayscale range. For example, the call imshow(I,[0.4 0.6]) displays the matrix I as a gray-scale image so that the value 0.4 gets displayed as black, and the value 0.6 gets displayed... read more >>

MATLAB image display – grayscale and binary images

Posted by Steve Eddins,

In my previous posts (February 9, February 22, and February 29), I discussed the truecolor and indexed image display models in MATLAB, as well as the direct and scaled variations of indexed display. The Image Processing Toolbox has conventions for two additional image display models: grayscale and binary. These conventions are used by the MATLAB image display function imshow, which originated in the Image Processing Toolbox.... read more >>

MATLAB image display – scaled indexed images 1

Posted by Steve Eddins,

scaled_indexed_images_03

In my last post on pixel colors, I described the truecolor and indexed image display models in MATLAB, and I promised to talk to soon about a third model. That model is the scaled indexed image, a variation on the indexed image. The function imagesc is often used to display... read more >>

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