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6 results for “Straight arrow”
RoadArrowORIEN: dataset of 6701 images (64x64 pixels) of straight arrow-type road markings and their azimuths
<p>The dataset consisting of 6701 PNG images (64x64 pixels) of straight arrow type road markings with different dimensions and orientations, together with the angle it forms with respect to the vertical axis (azimuth), has been constructed in the framework of the SROADEX project to train a regression neural network to calculate the azimuth of other straight arrows that can be identified in high resolution aerial orthoimages.</p> <p>The dataset was created by labeling with the labelme tool the straight arrows on orthoimage tesserae of 256x256 pixels. After semantic labeling by drawing an arrow on the orthoimage, the data was automatically processed to calculate the azimuthal angle. The procedure followed is as follows:<br> 1.- The vertices of the generated arrow-shaped polygon have been extracted.<br> 2.- Clusters of nearby points have been generated, with a minimum of 2 points and the cluster with less points and the one with more points has been identified. <br> 3.- For the clusters, the centroid has been generated, preserving the information of the number of vertices that define the cluster.<br> 4.- Then a vector has been generated with origin in the centroid of the arrow with less vertices grouped and as end the centroid with the highest number of vertices.<br> 5.- Finally, the azimuth of this vector with respect to the ordinate axis has been calculated, <br> The images have been automatically cropped with a constant size of 64x64 pixels taking an extension greater than the occupied of the arrow in the scene.</p> <p>The shared dataset consists of a compressed file with the images and a text file in CSV format with the names of the images and the normaliced [0..1] Azimutal angles of the straight arrows contained in the images.</p>
RoadTrafficMARKS: Dataset of 10057 images (256x256 pixels) of Curved arrow, Straight arrow, Pedestrian crossing, Straight-right merge arrow, Merge arrow, Left arrow, Yield, Stop, Right arrow, Straight-left merge arrow, Speed limit and Straight-right-left merge arrow markings and their BoundingBox labels
<p><strong>The dataset consists of 10057 PNG images (256x256 pixels) of </strong><strong>high resolution aerial orthoimages </strong><strong>taggged with </strong><strong>twelve classes of traffic signals</strong><strong>: (1) Curved arrow, (2) Straight arrow, (3) Pedestrian crossing, (4) Straight-right merge arrow, (5) Merge arrow, (6) Left arrow, (7) Yield, (8) Stop, (9) Right arrow, (10) Straight-left merge arrow, (11) Speed limit and (12) Straight-right-left merge arrow markings, together with their corresponding Bounding Boxes. The dataset has been created in the framework of the SROADEX project to train an identification process based on artificial neural networks.</strong></p> <p><strong>The dataset was created by manually tagging the twelve class of marks on orthoimage tiles of 256x256 pixels </strong><strong><strong>with the LabelMe tool</strong>. After the semantic labeling (manual digitalization of the contour of the signals), a transformation and random splitting process has been carried to prepare the data for the neural networks</strong><strong><strong> training</strong>. It resulted in 80% of the images for training (8031), 10% for validation (1000) and 10% for testing (1021).</strong></p> <p><strong>The next table presents the number of images of each class on the </strong><strong><strong>"train", "valid" and "test" </strong>sets.</strong></p> <table> <tbody> <tr> <td> </td> <td>Train</td> <td>Valid</td> <td>Test</td> <td>Total</td> </tr> <tr> <td>CURVED ARROW</td> <td>319</td> <td>43</td> <td>48</td> <td>410</td> </tr> <tr> <td>STRAIGHT ARROW</td> <td>6730</td> <td>806</td> <td>843</td> <td>8379</td> </tr> <tr> <td>PEDESTRIAN CROSSING</td> <td>3881</td> <td>465</td> <td>485</td> <td>4831</td> </tr> <tr> <td>STRIGNT-RIGHT MERGE ARROW</td> <td>1373</td> <td>187</td> <td>177</td> <td>1737</td> </tr> <tr> <td>MERGE ARROW</td> <td>550</td> <td>91</td> <td>59</td> <td>700</td> </tr> <tr> <td>LEFT ARROW </td> <td>238</td> <td>33</td> <td>31</td> <td>302</td> </tr> <tr> <td>YIELD</td> <td>356</td> <td>47</td> <td>40</td> <td>443</td> </tr> <tr> <td>STOP</td> <td>141</td> <td>19</td> <td>15</td> <td>175</td> </tr> <tr> <td>RIGHT ARROW</td> <td>836</td> <td>93</td> <td>111</td> <td>1040</td> </tr> <tr> <td>STRIGNT-LEFT MERGE ARROW</td> <td>152</td> <td>19</td> <td>21</td> <td>192</td> </tr> <tr> <td>SPEED LIMIT</td> <td>392</td> <td>50</td> <td>45</td> <td>487</td> </tr> <tr> <td>STRIGNT-RIGHT-LEFT MERGE ARROW</td> <td>82</td> <td>9</td> <td>9</td> <td>100</td> </tr> </tbody> </table>
◂Fig.15 Scanning electron micrographs (SEM) showing transverse rows of dentition on Dinaride Zospeum and Iberozospeum radulae; (a) Z. pretneri, (NMBE 553290), Gornja Cerovačka pećina, Croatia, transverse rows of teeth on long, slender basal plates (bp), rachidian (r) and lateral teeth (l), arrows indicate medial grooves on mesocones of individual teeth; (b) Z. isselianum, NMBE 553389, Turjeva jama, Slovenia, ibid.; (c) Iberozospeum sp. (RMNH.MOL.234,116), Cueva a Sul, straight transverse rows of small, seemingly bi-cuspid lateral teeth (l) with reduced mesocones on compact basal plates; (d) ibid., close up view of rachidian teeth (r), lateral fang-like teeth (l) and transitional teeth (t); (e) I. vasconicum, (AJC 1848), Cueva Ermita de Sandaili, rachidian teeth (r) flanked by 4-cuspid lateral teeth (l), C. ibazoricum-like in form; (f) Iberozospeum sp. (RMNH. MOL.234108), Cueva la Torcona, lateral teeth showing reduced mesocones (me) flanked by long, fang-like endo- and ectocones (e), rachidian tooth (r) (flipped over in upper righthand corner of image); (g) I. zaldivarae (AJC 1876a), Cueva de Las Paúles, transverse rows of teeth showing varying cusp lengths; (h) ibid., close up view (left to right) of marginal (m) and transitional teeth (t) on short, compact basal plates (bp). — Magnification varies for each perspective, see scale bars; all Figs taken by M. Ruppel, (ret.) Goethe University Frankfurt am Main in Molecular investigation and description of Iberozospeum n. gen., including the description of one new species (Eupulmonata, Ellobioidea, Carychiidae)
◂Fig.15 Scanning electron micrographs (SEM) showing transverse rows of dentition on Dinaride Zospeum and Iberozospeum radulae; (a) Z. pretneri, (NMBE 553290), Gornja Cerovačka pećina, Croatia, transverse rows of teeth on long, slender basal plates (bp), rachidian (r) and lateral teeth (l), arrows indicate medial grooves on mesocones of individual teeth; (b) Z. isselianum, NMBE 553389, Turjeva jama, Slovenia, ibid.; (c) Iberozospeum sp. (RMNH.MOL.234,116), Cueva a Sul, straight transverse rows of small, seemingly bi-cuspid lateral teeth (l) with reduced mesocones on compact basal plates; (d) ibid., close up view of rachidian teeth (r), lateral fang-like teeth (l) and transitional teeth (t); (e) I. vasconicum, (AJC 1848), Cueva Ermita de Sandaili, rachidian teeth (r) flanked by 4-cuspid lateral teeth (l), C. ibazoricum-like in form; (f) Iberozospeum sp. (RMNH. MOL.234108), Cueva la Torcona, lateral teeth showing reduced mesocones (me) flanked by long, fang-like endo- and ectocones (e), rachidian tooth (r) (flipped over in upper righthand corner of image); (g) I. zaldivarae (AJC 1876a), Cueva de Las Paúles, transverse rows of teeth showing varying cusp lengths; (h) ibid., close up view (left to right) of marginal (m) and transitional teeth (t) on short, compact basal plates (bp). — Magnification varies for each perspective, see scale bars; all Figs taken by M. Ruppel, (ret.) Goethe University Frankfurt am Main
Text-fig. 8. Lusitanispermum choffatii gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025) (a, b, d, e), and the Vale de Água locality (sample 333) (c, f, g), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, volume renderings). a) Smaller seed in lateral view showing the bulging region (arrow head) close to hilum (S174467). b) Cut volume rending (cut at yz1032) of seed in (8a) showing the expanded cells of exotesta immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and the well preserved nutritive tissue. c) Small seed in lateral view showing the bulging exotesta (arrow head) close to hilum (S175046). d, e) Larger seed in lateral (d) and raphal (e) view (S174035). f) Detail of seed in (8c) showing the micropylar slit (mi) above the hilum (hi) and bulging exotestal tissue (arrow head) in which the walls of the exotestal cells have straight anticlinal walls. g) Surface of seed in (8c) showing the raised undulate anticlinal walls of the exotestal cells. Scale bars = 500 µm (a–e); 250 µm (f); 125 µm (g). in Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal
Text-fig. 8. Lusitanispermum choffatii gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025) (a, b, d, e), and the Vale de Água locality (sample 333) (c, f, g), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, volume renderings). a) Smaller seed in lateral view showing the bulging region (arrow head) close to hilum (S174467). b) Cut volume rending (cut at yz1032) of seed in (8a) showing the expanded cells of exotesta immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and the well preserved nutritive tissue. c) Small seed in lateral view showing the bulging exotesta (arrow head) close to hilum (S175046). d, e) Larger seed in lateral (d) and raphal (e) view (S174035). f) Detail of seed in (8c) showing the micropylar slit (mi) above the hilum (hi) and bulging exotestal tissue (arrow head) in which the walls of the exotestal cells have straight anticlinal walls. g) Surface of seed in (8c) showing the raised undulate anticlinal walls of the exotestal cells. Scale bars = 500 µm (a–e); 250 µm (f); 125 µm (g).
FIGURES – 0. Cocconeis sp. (cf. capensis (Cholnoky) Witkowski). SEM (New Caledonia, Melanesia). External views. Biseriate SV striae (16, 18, twin arrows), narrow and straight SV sternum, marginal large area with one row of beads (16–18), SV marginal area with tiny pores (17), SV crater-like areolae with oblong in a zigzag lumen (19), SV areolae with sort of expansions (20). Scale bars: 4 µm (16), 3 µm (18), 700 nm (17), 400 nm (19–20). in Marine Achnanthales (Bacillariophyceae) from New Caledonia (Melanesia): assemblage specificities, ultramafic environment
FIGURES – 0. Cocconeis sp. (cf. capensis (Cholnoky) Witkowski). SEM (New Caledonia, Melanesia). External views. Biseriate SV striae (16, 18, twin arrows), narrow and straight SV sternum, marginal large area with one row of beads (16–18), SV marginal area with tiny pores (17), SV crater-like areolae with oblong in a zigzag lumen (19), SV areolae with sort of expansions (20). Scale bars: 4 µm (16), 3 µm (18), 700 nm (17), 400 nm (19–20).
Text-fig. 35. Scanning electron microscope (SEM, a, b, d) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c, e) images of "Paisia-like follicle"; Catefica locality, Portugal. a) Lateral view of slender follicle with an almost straight ventral margin and a slightly curved dorsal margin; b) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; c) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; d) Apical part of follicle in (a) showing the slight apical cleft in the probable stigmatic region; e) Transverse section (orthoslice xy0407) of follicle showing ovules and distinct follicle wall with small, thin-walled cells of the outer epidermis (arrow), larger, isodiametric cells of the mesocarp and an inner layer of smaller, thin-walled cells. Specimens, Catefica 50-S171523 (a, d), Catefica 343-S171515 (b), Catefica 49-S174929 (c, e). Scale bars = 300 Μm (a–c), 100 Μm (d, e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 35. Scanning electron microscope (SEM, a, b, d) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c, e) images of "Paisia-like follicle"; Catefica locality, Portugal. a) Lateral view of slender follicle with an almost straight ventral margin and a slightly curved dorsal margin; b) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; c) Lateral view of small, broad follicle with slightly sinuous ventral margin and rounded dorsal margin; d) Apical part of follicle in (a) showing the slight apical cleft in the probable stigmatic region; e) Transverse section (orthoslice xy0407) of follicle showing ovules and distinct follicle wall with small, thin-walled cells of the outer epidermis (arrow), larger, isodiametric cells of the mesocarp and an inner layer of smaller, thin-walled cells. Specimens, Catefica 50-S171523 (a, d), Catefica 343-S171515 (b), Catefica 49-S174929 (c, e). Scale bars = 300 Μm (a–c), 100 Μm (d, e).
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