So sánh phương pháp

	Cân bằng lược đồ mức xám	Phát hiện đốm	Các phép toán hình thái học ảnh
Lĩnh vực	Thị giác máy tính	Thị giác máy tính	Thị giác máy tính
Họ	Machine learning	Machine learning	Machine learning
Năm ra đời	1970s	1998	1982
Người khởi xướng	Signal processing community	Tony Lindeberg	Jean Serra
Loại	Contrast enhancement and preprocessing	Multi-scale feature detection	Set theory and topological image processing
Công trình gốc	Gonzalez, R. C., & Woods, R. E. (1992). Digital Image Processing. Addison-Wesley, 2nd edition, Chapter 3.	Lindeberg, T. (1998). Feature detection with automatic scale selection. International Journal of Computer Vision, 30(2), 79–116.	Serra, J. (1982). Image Analysis and Mathematical Morphology. Academic Press.
Tên gọi khác	Histogram stretching, Contrast enhancement	Connected component analysis, Region-based detection	Mathematical morphology, Morphological filtering
Liên quan	5	5	5
Tóm tắt	Histogram equalization is an image preprocessing technique that redistributes pixel intensities to improve contrast and visibility of details. By spreading the histogram of pixel values evenly across the available range, histogram equalization enhances images with poor contrast, making features more visually distinct and easier to process algorithmically.	Blob detection is a technique for identifying regions of interest (blobs)—connected, homogeneous areas that differ from their surroundings—at multiple scales. Introduced by Lindeberg in the context of scale-space theory, blob detection automatically finds and characterizes circular or elliptical objects without requiring a priori knowledge of their size.	Morphological image processing, introduced by Jean Serra in 1982, is a technique based on set theory that reshapes and analyzes image regions using geometric structuring elements. Core operations include erosion and dilation, which can be combined into more complex operations like opening and closing, enabling noise removal, edge detection, and object analysis.