So sánh phương pháp

	Cân bằng lược đồ mức xám	Phát hiện biên Canny	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	1986	1982
Người khởi xướng	Signal processing community	John Canny	Jean Serra
Loại	Contrast enhancement and preprocessing	Image gradient analysis	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.	Canny, J. (1986). A computational approach to edge detection. IEEE Transactions on Pattern Analysis and Machine Intelligence, 8(6), 679–698.	Serra, J. (1982). Image Analysis and Mathematical Morphology. Academic Press.
Tên gọi khác	Histogram stretching, Contrast enhancement	Canny operator, Canny edge detector	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.	The Canny edge detector, introduced by John Canny in 1986, is a multi-stage algorithm for identifying edges in digital images where significant intensity changes occur. Canny's method is optimal for step edges in additive Gaussian noise and remains the gold standard for edge detection in computer vision due to its mathematical elegance and practical effectiveness.	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.