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Making the Web Accessible
Published in Constantine Stephanidis, User Interfaces for All, 2000
Daniel Dardailler, Judy Brewer, Ian Jacobs
HTML 4.0 includes several features to facilitate navigation: For client-side image maps, the “MAP” element may contain anchor elements (“A”) that simultaneously specify the active regions of the image map and provide detailed textual explanations of links. As mentioned earlier, these links may be marked up with rich alternate descriptions of the image map.The “title” attribute, with the “A” element, can describe the nature of a link, so that users may decide whether to follow it.The “accesskey” attribute allows users to activate links or form controls from the keyboard.The “tabindex” attribute allows users to use the keyboard to navigate the links or form controls on a page in a logical sequence.The “LINK” element (specified in the header of a document) together with the “media” attribute allow user agents (e.g., browsers) to load appropriate pages for a specific target medium automatically, making user navigation to those pages unnecessary.
Comprehensive assessment to residents’ perceptions to historic urban center in megacity: a case study of Yuexiu District, Guangzhou, China
Published in Journal of Asian Architecture and Building Engineering, 2021
Zhaohua Deng, Dantong Chen, Xiaoling Qin, Shifu Wang
For the production of a cognitive image map, the coordinate finding function of the Baidu Map was used (Baidu 2020a). The environmental features were located in GIS on an ordinance survey map downloaded from the Baidu Map (Baidu 2020b). The ArcScene component of ArcGIS 3D Analyst was employed to visualize the cognitive map in three dimensions, in which the mentioned frequencies constituted the z-axis, indicating the levels of imageability. Accordingly, a 3D cognitive map for the Yuexiu District could be created. Its representative features were later arranged in terms of form (landmark, path, and district) and function (public space, transportation, culture, public service, residential, office, commercial, and nature), as explained previously, to explain their spatial structure.
Alteration and structural features mapping in Kacho-Mesqal zone, Central Iran using ASTER remote sensing data for porphyry copper exploration
Published in International Journal of Image and Data Fusion, 2021
Soheyla Beygi, Irina Vladimirovna Talovina, Meisam Tadayon, Amin Beiranvand Pour
Figure 7 shows the SAM classification map for the study area. The pink colour pixels show the argillic alteration that dominated by kaolinite and montmorillonite. Muscovite and illite considered for phyllic alteration as yellow colour pixels. Chlorite and epidote are indicator for propyllitic alteration as green colour pixels. The argillic zone shows similar spatial distribution with PCA image-map (see Figure 6), which is typically mapped in granodiorite intrusion (Nasrand granodiorite), tuff breccia, siltstone and conglomerate, shale and marl, sandstone and some parts of andesitic background (Figure 7). Phyllic alteration is mostly detected in sandstone unit. However, some high abundance zones are observable in granodiorite intrusion (Nasrand granodiorite) and andesitic background (Figure 7). Phyllic zone in the SAM image-map (Figure 7) is stronger compared to the PCA image-map (see Figure 6). The spatial distribution of propyllitic alteration zone in the SAM image-map compared to PCA image-maps is lower. However, propyllitic alteration is especially abundant in the western part of the study area in the andesitic background (Figure 7).
A visual attention system based anisotropic diffusion method for an effective textile defect detection
Published in The Journal of The Textile Institute, 2021
Mohamed Ben Gharsallah, Ezzedine Ben Braiek
High gradient amplitude is usually a good indication of image edges. These edges may belong to defects or background. The aim is retain only defect edges. Hence, the gradient amplitude should not be used as the sole local feature in the diffusion process. The principle of saliency systems is to focus attention to the striking patterns in the image which corresponds frequently to the defect zone. Based on these assumptions we propose to incorporate a saliency image map in the anisotropic diffusion model. The aim is to apply a high diffusion flux in the faultless area and to stop it at the defect zone. These defects should be carefully conserved while the diffusion progression so that they will not deceive the further segmentation step.