diff --git a/typo3/sysext/core/Classes/Resource/Service/FileProcessingService.php b/typo3/sysext/core/Classes/Resource/Service/FileProcessingService.php
index 07b26cabf1319efef27876753905845479952334..ea75081659252be108965e59bb63d2bb1d9d0b66 100644
--- a/typo3/sysext/core/Classes/Resource/Service/FileProcessingService.php
+++ b/typo3/sysext/core/Classes/Resource/Service/FileProcessingService.php
@@ -17,6 +17,7 @@ namespace TYPO3\CMS\Core\Resource\Service;
 use Psr\EventDispatcher\EventDispatcherInterface;
 use TYPO3\CMS\Core\Resource;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Utility\MathUtility;
 
 /**
  * File processing service
@@ -81,6 +82,13 @@ class FileProcessingService
         if ($taskType === Resource\ProcessedFile::CONTEXT_IMAGEPREVIEW) {
             $configuration = Resource\Processing\LocalPreviewHelper::preProcessConfiguration($configuration);
         }
+        // Ensure that the processing configuration which is part of the hash sum is properly cast, so
+        // unnecessary duplicate images are not produced, see #80942
+        foreach ($configuration as &$value) {
+            if (MathUtility::canBeInterpretedAsInteger($value)) {
+                $value = (int)$value;
+            }
+        }
 
         /** @var Resource\ProcessedFileRepository $processedFileRepository */
         $processedFileRepository = GeneralUtility::makeInstance(Resource\ProcessedFileRepository::class);