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Introduction to MATLAB and
image processing
MATLAB and images
• The help in MATLAB is very good, use it!
• An image in MATLAB is treated as a matrix
• Every pixel is a matrix element
• All the operators in MATLAB defined on
matrices can be used on images: +, -, *, /, ^, sqrt, sin, cos etc.
Images in MATLAB
• MATLAB can import/export
several image formats
– BMP (Microsoft Windows Bitmap)
– GIF (Graphics Interchange Files)
– HDF (Hierarchical Data Format)
– JPEG (Joint Photographic Experts
Group)
– PCX (Paintbrush)
– PNG (Portable Network Graphics)
– TIFF (Tagged Image File Format)
– XWD (X Window Dump)
– MATLAB can also load raw-data or
other types of image data
• Data types in MATLAB
– Double (64-bit double-precision
floating point)
– Single (32-bit single-precision
floating point)
– Int32 (32-bit signed integer)
– Int16 (16-bit signed integer)
– Int8 (8-bit signed integer)
– Uint32 (32-bit unsigned integer)
– Uint16 (16-bit unsigned integer)
– Uint8 (8-bit unsigned integer)
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