Steve on Image Processing

Results for: Pixel colors

From the archives: All about pixel colors 7

Posted by Steve Eddins,

From the archives: All about pixel colors  When I started this blog in early 2006, one of my first series of articles was called "All About Pixel Colors." These articles discussed how MATLAB associates matrix values with specific screen pixel colors. The series talked about the two fundamental image display models (indexed and truecolor); the scaled... read more >>

All about pixel colors: Summary 29

Posted by Steve Eddins,

All about pixel colors: Summary  This week I wrote the last in a series of postings that discussed how MATLAB associates matrix values with specific screen pixel colors. The series talked about the two fundamental image display models (indexed and truecolor); the scaled indexed image variation; using indexed scaling to program brightness/contrast controls; and the... read more >>

All about pixel colors: Grayscale and binary images 137

Posted by Steve Eddins,

All about pixel colors: Grayscale and binary images  In my previous postings on this topic, I've discussed the basic image display models in MATLAB - truecolor and indexed. The Image Processing Toolbox has conventions for two additional image display models:... read more >>

All about pixel colors: Reference information 7

Posted by Steve Eddins,

All about pixel colors: Reference information  In this posting I want to summarize all of the factors that control image pixel colors in MATLAB. This information is in the MATLAB documentation, but it is scattered around in several... read more >>

All about pixel colors: Window-level and CLim 10

Posted by Steve Eddins,

All about pixel colors: Window-level and CLim  In a comp.soft-sys.matlab newsgroup post on January 17, Kevin wanted to know how the brightness/contrast control in imtool worked. Image Processing Toolbox function imtool is an image viewing/navigation GUI. In medical imaging the brightness/contrast control is called the "window/level" control, and... read more >>

All about pixel colors: Scaled indexed images 52

Posted by Steve Eddins,

All about pixel colors: Scaled indexed images  In my last post on pixel colors, I described the truecolor and indexed image display models in MATLAB, and I promised to discuss an important variation on the indexed image model. That variation is the scaled indexed image, and the relevant MATLAB... read more >>

All about pixel colors: Truecolor and indexed images 77

Posted by Steve Eddins,

All about pixel colors: Truecolor and indexed images  Last week I posed this question: How does MATLAB associate the value of a particular matrix element with a color displayed on the screen? Let's start by exploring MATLAB's two basic pixel-color... read more >>

All about pixel colors 9

Posted by Steve Eddins,

All about pixel colors  Tell me, quick: What are the colors of these pixel values? 252 249 246 243 237 255 255 250 246 243 253 254 248 245 ... read more >>

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