Using MATLAB Graphics     Search    Help Desk 

Displaying Bit-Mapped Images

Overview

MATLAB provides commands for reading, writing, and displaying several types of graphics file formats for images. As with MATLAB-generated images, once a graphics file format image is displayed, it becomes a Handle Graphics® image object. MATLAB supports the following graphics file formats:

For information concerning the bit depths and image types supported for these formats, see imread and imwrite.

MATLAB supports three different numeric classes for image display: double-precision floating-point (double), 16-bit unsigned integer (uint16), and 8-bit unsigned integer (uint8). The image display commands interpret data values differently depending on the numeric class the data is stored in.

This chapter discusses the different data and image types you can use, and includes details on how to: read, write, work with, and display graphics images; how to alter the display properties and aspect ratio of an image during display; how to print an image; and how to convert the data type or graphics format of an image.

This table lists the functions discussed in this chapter.

Function
 Purpose
 Function Group
axis
 Plot axis scaling and appearance
Display
image
 Display image (create image object)
 Display
imagesc
 Scale data and display as image
 Display
imread
 Read image from graphics file
 File I/O
imwrite
 Write image to graphics file
 File I/O
imfinfo
 Get image information from graphics file
 Utility
ind2rgb
 Convert indexed image to RGB image
 Utility


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