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 >>

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 >>

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 >>

Last time I posed this question: How does MATLAB associate the value of particular array elements with a color displayed on the screen? Let's start by exploring MATLAB's two basic pixel-color display models:... read more >>

Here's a quick quiz for you: How bright are these pixel values?... read more >>