Thirteen Common Methods for X-Ray Image Recognition in Security Screening of Passenger Baggage

In theory, image recognition involves judging based on the colors and shapes displayed on the monitor, but in actual operation, more issues may arise. There are various methods for image recognition, and the most important factor is the accumulation of experience in daily work. Under normal circumstances, image recognition mainly relies on: 1. Color judgment; 2. Shape judgment; 3. Use of the zoom key; 4. Use of function keys.</p><p><strong>I. Overall Image Analysis Method</strong><br>Interpret the entire image from the center outward. Observe every detail of the image to determine whether the items in it are interconnected. If suspicious explosive items are encountered, an overall judgment should be made based on the presence of power sources, wires, timing devices, detonation devices, etc.</p><p><strong>II. Color Analysis Method</strong><br>The screening operator can identify the inspected item based on the colors in the X-ray image. After X-ray penetration, the colors displayed in the image mainly fall into four categories: orange, blue, green, and black. Based on the different colors in the image, the composition of the item passing through the machine can be roughly determined.</p><p><strong>III. Shape Analysis Method</strong><br>The shape analysis method judges items based on their outlines in the X-ray image. For items with relatively obvious external features (such as scissors, pistols, etc.), the shape analysis method can be used for identification.</p><p><strong>IV. Function Key Analysis Method</strong><br>The function key analysis method refers to making full use of the functions of the function keys to conduct comprehensive analysis and comparison of the image for judgment. The main function keys of the security inspection machine include zoom, organic/inorganic removal, inversion, brightening, and image enhancement.<br>1. Zoom key<br>The zoom key can enlarge the X-ray image to help identify details of the item under inspection.<br>2. Organic/inorganic removal key<br>The organic/inorganic removal key can remove the colors representing organic or inorganic substances, allowing for identification of one type of substance.<br>3. Inversion key<br>The inversion key can display the X-ray image in black-and-white inverted effect. When it is necessary to identify items with lower density or lighter-colored parts, the inversion key can be used to help determine the outline of the item.<br>4. Brightening key<br>The brightening key can enhance the brightness of the X-ray image. When the X-ray image is too dark, the brightening key can be used to help identify the item.<br>5. Image enhancement key<br>The image enhancement key can make originally unclear X-ray images clearer or emphasize specific features, enlarging the differences between features of different items in the X-ray image to facilitate item identification.</p><p><strong>V. Key Point Analysis Method</strong><br>The key point analysis method refers to conducting focused analysis on items in the X-ray image whose nature is difficult to determine, items that X-rays cannot penetrate, or areas of suspicion.</p><p><strong>VI. Symmetry Analysis Method</strong><br>The symmetry analysis method refers to finding symmetrical points based on the structural characteristics of the luggage in the X-ray image, mainly analyzing and comparing asymmetric point-like or line-like items in the luggage structure to discover suspicious items.</p><p><strong>VII. Feature Analysis Method</strong><br>The feature analysis method, also known as the structural analysis method, refers to identifying items by capturing certain features in the structure of an item.</p><p><strong>VIII. Commonality Analysis Method</strong><br>The commonality analysis method, also known as the structural analysis method, refers to identifying items by capturing certain features in the structure of an item.</p><p><strong>IX. Associative Analysis Method</strong><br>The associative analysis method refers to inferring other items based on one identifiable item in the X-ray image.</p><p><strong>X. Conventional Analysis Method</strong><br>Determine whether the items displayed in the image violate conventional norms. For example, if the shape, color, or structural features of items in the image differ significantly from images of common items.</p><p><strong>XI. Elimination Method</strong><br>First eliminate items that have already been identified, then conduct focused analysis on the remaining item images. For example, first eliminate confirmed safe items in the image (such as phones, chargers, coins, etc.), then conduct focused analysis on the remaining images.</p><p><strong>XII. Angle Analysis Method</strong><br>The angle analysis method refers to making judgments by analyzing the characteristics of items in the X-ray image from various angles.</p><p><strong>XIII. Comprehensive Analysis Method</strong><br>Use several of the above methods simultaneously to analyze and interpret the image. For example, when interpreting a laptop, methods such as key point analysis, associative analysis, and feature analysis can be used for interpretation.</p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p>