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Obstacle detection algorithm of low computational cost for Guanay II AUV
| Instrumentation Viewpoint
Obstacle detection is one of the most important stages in the obstacle
avoidance system. This work is focused to explain the operation of a designed and
implemented for the overall detection of objects with low computational cost strategy.
This strategy of low computational cost is based on performing a spatial segmentation
of the information obtained by the SONAR and determine the minimum
distance between the SONAR (AUV) and the obstacle.
All papers presented at Martech will be published in both the UPCommons and the Martech organization web sites, the former being the institutional digital deposit of Universitat Politècnica de Catalunya (https://upcommons.upc.edu). This difussion will be made through the Creative Commons License Attribution-NonCommercial-NoDerivs 2.5 or similar (http://creativecommons.org/licenses/by-nc-nd/2.5/deed.en).
When sending the final paper, the author must agree to the conference having non-exclusive rights on this operation. The author will maintain his/her right to diffuse the paper elsewhere.
Warning: mkdir(): Permission denied in /var/www/ojs/lib/pkp/classes/file/FileManager.php on line 424
Warning: file_put_contents(/SAN/files_ojs/usageStats/salt): Failed to open stream: No such file or directory in /var/www/ojs/lib/pkp/classes/statistics/PKPStatisticsHelper.php on line 158
Warning: filemtime(): stat failed for /SAN/files_ojs/usageStats/salt in /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php on line 213
Warning: file_put_contents(/SAN/files_ojs/usageStats/salt): Failed to open stream: No such file or directory in /var/www/ojs/lib/pkp/classes/statistics/PKPStatisticsHelper.php on line 158
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Warning: fopen(/SAN/files_ojs/usageStats/usageEventLogs/usage_events_20260926.log): Failed to open stream: No such file or directory in /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php on line 104
Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, false given in /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php:105
Stack trace:
#0 /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php(105): flock(false, 2)
#1 /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php(53): PKP\observers\listeners\LogUsageEvent->logUsageEvent('{"time":"2026-0...')
#2 /var/www/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(512): PKP\observers\listeners\LogUsageEvent->handle(Object(APP\observers\events\UsageEvent))
#3 /var/www/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(319): Illuminate\Events\Dispatcher->Illuminate\Events\{closure}('APP\\observers\\e...', Array)
#4 /var/www/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(299): Illuminate\Events\Dispatcher->invokeListeners('APP\\observers\\e...', Array, false)
#5 /var/www/ojs/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php(505): Illuminate\Events\Dispatcher->dispatch(Object(APP\observers\events\UsageEvent))
#6 /var/www/ojs/pages/article/ArticleHandler.php(366): event(Object(APP\observers\events\UsageEvent))
#7 [internal function]: APP\pages\article\ArticleHandler->view(Array, Object(APP\core\Request))
#8 /var/www/ojs/lib/pkp/classes/core/PKPRouter.php(327): call_user_func(Array, Array, Object(APP\core\Request))
#9 /var/www/ojs/lib/pkp/classes/core/PKPPageRouter.php(249): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(APP\core\Request), Array, false)
#10 /var/www/ojs/lib/pkp/classes/core/Dispatcher.php(157): PKP\core\PKPPageRouter->route(Object(APP\core\Request))
#11 /var/www/ojs/lib/pkp/classes/core/PKPApplication.php(429): PKP\core\Dispatcher->dispatch(Object(APP\core\Request))
#12 /var/www/ojs/index.php(21): PKP\core\PKPApplication->execute()
#13 {main}
thrown in /var/www/ojs/lib/pkp/classes/observers/listeners/LogUsageEvent.php on line 105