电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC Types of Image Enhancement in the Spatial Domain Single pixel methods Gray level transformations Example Historgram equalization Contrast stretching -Arithmetic/logic operations Examples Image subtraction Image averaging Multiple pixel methods Examples:Spatial filtering Smoothing filters Sharpening filtersTypes of Image Enhancement in the Spatial Domain ◼ Single pixel methods - Gray level transformations Example - Historgram equalization - Contrast stretching - Arithmetic/logic operations Examples - Image subtraction - Image averaging ◼ Multiple pixel methods Examples: Spatial filtering - Smoothing filters - Sharpening filters