{"id":16067,"date":"2026-01-15T10:00:00","date_gmt":"2026-01-15T09:00:00","guid":{"rendered":"https:\/\/www.sigterritoires.fr\/?p=16067"},"modified":"2026-01-10T19:04:46","modified_gmt":"2026-01-10T18:04:46","slug":"integration-de-esrgan-dans-qgis","status":"publish","type":"post","link":"https:\/\/www.sigterritoires.fr\/index.php\/integration-de-esrgan-dans-qgis\/","title":{"rendered":"Int\u00e9gration de ESRGAN dans QGIS"},"content":{"rendered":"\n

Il existe trois m\u00e9thodes simples pour exploiter ESRGAN dans QGIS (voir l’article pr\u00e9c\u00e9dent).
La premi\u00e8re \u2013 la plus flexible \u2013 consiste \u00e0 ajouter un script Python dans la Processing Toolbox<\/strong> de QGIS.<\/p>\n\n\n\n

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Contenu <\/p>\nToggle<\/span>
Int\u00e9gration via un script Python (Processing Toolbox)<\/a>
Principe<\/a><\/li><\/ul><\/li>
Exemple de script (version NCNN Vulkan recommand\u00e9e)<\/a>
Script QGIS (\u00e0 copier dans : Processing \u2192 Scripts \u2192 Nouveau script)<\/a><\/li><\/ul><\/li>
Comment installer ce script dans QGIS ?<\/a><\/li>
Comment l\u2019utiliser ?<\/a><\/li>
Avantages de cette m\u00e9thode<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n
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<\/span>Int\u00e9gration via un script Python (Processing Toolbox)<\/strong><\/span><\/h2>\n\n\n\n
Cette approche permet d\u2019appeler ESRGAN directement depuis QGIS, comme n\u2019importe quel algorithme de traitement.
L\u2019utilisateur s\u00e9lectionne un raster \u2192 ESRGAN l\u2019am\u00e9liore \u2192 QGIS recharge automatiquement le fichier r\u00e9sultant.<\/p>\n\n\n\n
<\/span>Principe<\/strong><\/span><\/h3>\n\n\n\n
Le script Python :<\/p>\n\n\n\n
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prend un raster d\u2019entr\u00e9e<\/strong>, appartenant d\u00e9j\u00e0 au projet QGIS ;<\/li>\n\n\n\n
appelle Real-ESRGAN<\/strong> (version NCNN Vulkan ou PyTorch) en ligne de commande ;<\/li>\n\n\n\n
g\u00e8re le fichier de sortie<\/strong> (nom, chemin, g\u00e9or\u00e9f\u00e9rencement si n\u00e9cessaire) ;<\/li>\n\n\n\n
charge automatiquement la version am\u00e9lior\u00e9e dans QGIS<\/strong>.<\/li>\n<\/ol>\n\n\n\n
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<\/span>Exemple de script (version NCNN Vulkan recommand\u00e9e)<\/span><\/h2>\n\n\n\n
Ce script fonctionne en appelant l\u2019ex\u00e9cutable :
realesrgan-ncnn-vulkan.exe<\/code><\/p>\n\n\n\n
Il suppose que :<\/p>\n\n\n\n
\nReal-ESRGAN-ncnn-vulkan se trouve dans : C:\/SR\/realesrgan-ncnn-vulkan-20220424-windows\/<\/mark><\/li>\n\n\n\n On veut g\u00e9n\u00e9rer un fichier suffix\u00e9 _sr.tif<\/code><\/li>\n\n\n\nLe g\u00e9or\u00e9f\u00e9rencement doit \u00eatre repris depuis le raster d\u2019origine (via GDAL<\/a>)<\/li>\n<\/ul>\n\n\n\nTu pouvez l\u2019adapter selon votre installation.<\/p>\n\n\n\n \n\n\n\n<\/span>Script QGIS (\u00e0 copier dans : Processing \u2192 Scripts \u2192 Nouveau script)<\/strong><\/span><\/h3>\n\n\n<\/div>esrgan_superresolution.py<\/div><\/div><\/div><\/p>\n\n\n\nfrom qgis.core import (\n QgsProcessingAlgorithm,\n QgsProcessingParameterRasterLayer,\n QgsProcessingParameterNumber,\n QgsProcessingParameterEnum,\n QgsProcessingParameterRasterDestination,\n QgsProcessingException\n)\nimport os\nimport subprocess\nfrom osgeo import gdal, osr\n\nclass ESRGANSuperResolution(QgsProcessingAlgorithm):\n\n def initAlgorithm(self, config=None):\n self.addParameter(\n QgsProcessingParameterRasterLayer(\"INPUT_RASTER\", \"Raster d\u2019entr\u00e9e\")\n )\n self.addParameter(\n QgsProcessingParameterNumber(\n \"SCALE\",\n \"Facteur d\u2019agrandissement\",\n type=QgsProcessingParameterNumber.Integer,\n defaultValue=4\n )\n )\n self.addParameter(\n QgsProcessingParameterEnum(\n \"MODEL\",\n \"Mod\u00e8le ESRGAN\",\n options=[\"realesrgan-x4plus\", \"realesrgan-x4plus-anime\", \"realesrnet-x4plus\"],\n defaultValue=0\n )\n )\n self.addParameter(\n QgsProcessingParameterRasterDestination(\"OUTPUT_RASTER\", \"Raster de sortie\")\n )\n\n def processAlgorithm(self, parameters, context, feedback):\n input_layer = self.parameterAsRasterLayer(parameters, \"INPUT_RASTER\", context)\n if input_layer is None:\n raise QgsProcessingException(\"Raster d\u2019entr\u00e9e invalide.\")\n \n input_raster = input_layer.source()\n scale = self.parameterAsInt(parameters, \"SCALE\", context)\n model_index = self.parameterAsInt(parameters, \"MODEL\", context)\n output_raster = self.parameterAsOutputLayer(parameters, \"OUTPUT_RASTER\", context)\n\n exe = r\"C:\/SR\/realesrgan-ncnn-vulkan-20220424-windows\/realesrgan-ncnn-vulkan.exe<\/mark>\"\n if not os.path.exists(exe):\n raise QgsProcessingException(\"Executable Real-ESRGAN introuvable : \" + exe)\n\n # Fichiers temporaires\n tmp_png = os.path.splitext(input_raster)[0] + \"_tmp.png\"\n sr_png = os.path.splitext(input_raster)[0] + \"_sr.png\"\n\n model_list = [\"realesrgan-x4plus\", \"realesrgan-x4plus-anime\", \"realesrnet-x4plus\"]\n model_name = model_list[model_index]\n\n # -----------------------------\n # Conversion vers PNG\n feedback.pushInfo(\"Conversion en PNG\u2026\")\n subprocess.run([\"gdal_translate\", \"-of\", \"PNG\", input_raster, tmp_png], check=True)\n\n # -----------------------------\n # Super-r\u00e9solution ESRGAN\n feedback.pushInfo(\"Ex\u00e9cution ESRGAN\u2026\")\n subprocess.run([exe, \"-i\", tmp_png, \"-o\", sr_png, \"-n\", model_name, \"-s\", str(scale)], check=True)\n\n # -----------------------------\n # Calcul de la nouvelle g\u00e9otransformation\n src<\/a> = gdal.Open(input_raster)\n gt = src.GetGeoTransform()\n proj = src.GetProjection()\n # Ajustement du pixel pour conserver l'emprise\n new_gt = (gt[0], gt[1]\/scale, gt[2], gt[3], gt[4], gt[5]\/scale)\n\n # Cr\u00e9ation du worldfile pour sr_png\n wld_path = sr_png.replace(\".png\", \".wld\")\n with open(wld_path, \"w\") as f:\n f.write(f\"{new_gt[1]}\\n{new_gt[2]}\\n{new_gt[4]}\\n{new_gt[5]}\\n{new_gt[0]}\\n{new_gt[3]}\\n\")\n\n # Cr\u00e9ation du .prj\n srs = osr.SpatialReference()\n srs.ImportFromWkt(proj)\n prj_path = sr_png.replace(\".png\", \".prj\")\n with open(prj_path, \"w\") as f:\n f.write(srs.ExportToWkt())\n\n # -----------------------------\n # Reprojection \/ cr\u00e9ation du TIF final\n feedback.pushInfo(\"Cr\u00e9ation du TIF final\u2026\")\n subprocess.run([\n \"gdalwarp\",\n \"-t_srs\", src.GetProjection(),\n sr_png, output_raster\n ], check=True)\n\n # -----------------------------\n # Nettoyage\n for f in [tmp_png, sr_png, wld_path, prj_path]:\n if os.path.exists(f):\n os.remove(f)\n\n return {\"OUTPUT_RASTER\": output_raster}\n\n def name(self):\n return \"esrgan_super_resolution\"\n\n def displayName(self):\n return \"Super-r\u00e9solution ESRGAN (NCNN)\"\n\n def group(self):\n return \"Super-R\u00e9solution\"\n\n def groupId(self):\n return \"super_resolution\"\n\n def createInstance(self):\n return ESRGANSuperResolution()\n\n<\/code><\/pre>\n\n\n\n<\/div><\/div>\n\n\n\n \n\n\n\n<\/span>Comment installer ce script dans QGIS ?<\/strong><\/span><\/h2>\n\n\n\n\nOuvrez QGIS<\/strong><\/li>\n\n\n\n Allez dans : Traitements \u2192 Bo\u00eete \u00e0 outils \u2192 Scripts \u2192 Ouvrir le dossier des scripts<\/strong><\/li>\n\n\n\n Cr\u00e9ez un nouveau fichier : esrgan_superresolution.py<\/code><\/li>\n\n\n\n Collez le script ci-dessus<\/li>\n\n\n\n Red\u00e9marrez QGIS<\/li>\n<\/ol>\n\n\n\nVous verrez appara\u00eetre :<\/p>\n\n\n\n Scripts \u2192 Super-r\u00e9solution Real-ESRGAN (NCNN)\n<\/code><\/pre>\n\n\n\n \n\n\n\n<\/span>Comment l\u2019utiliser ?<\/strong><\/span><\/h2>\n\n\n\n\nChargez une ortho, photo ancienne, ou tout raster dans QGIS<\/li>\n\n\n\n Ouvrez : Traitements \u2192 Scripts \u2192<\/strong><\/strong> Super-r\u00e9solution <\/strong><\/li>\n\n\n\n Choisissez :\n\nRaster d\u2019entr\u00e9e<\/li>\n\n\n\n Facteur \u00d74<\/li>\n\n\n\n Mod\u00e8le ESRGAN<\/li>\n\n\n\n Raster de sortie<\/li>\n<\/ul>\n<\/li>\n\n\n\n Lancez<\/li>\n<\/ol>\n\n\n\n\u2192 Le raster super-r\u00e9solu appara\u00eet directement sur la carte QGIS. <\/p>\n\n\n\n \n\n\n\n<\/span>Avantages de cette m\u00e9thode<\/strong><\/span><\/h2>\n\n\n\n\nInt\u00e9gration propre dans QGIS<\/li>\n\n\n\n Fonctionne sans GPU (NCNN Vulkan = CPU + GPU Intel)<\/li>\n\n\n\n R\u00e9sultats reproductibles<\/li>\n\n\n\n Aucune modification de QGIS n\u2019est n\u00e9cessaire<\/li>\n\n\n\n Possibilit\u00e9 d\u2019int\u00e9grer ensuite dans un cha\u00eenage de traitements<\/li>\n<\/ul>\n\n\n\n \n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":" Il existe trois m\u00e9thodes simples pour exploiter ESRGAN dans QGIS (voir l’article pr\u00e9c\u00e9dent).La premi\u00e8re \u2013 la plus flexible \u2013 consiste \u00e0 ajouter un script Python dans la Processing Toolbox de QGIS. Int\u00e9gration via un script Python…<\/p>\n","protected":false},"author":1,"featured_media":16064,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"give_campaign_id":0,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3853,147,62],"tags":[3917,3869,343,58],"class_list":["post-16067","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iafr","category-images","category-qgis-2","tag-esrgan","tag-ia","tag-images","tag-qgis"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/11\/resultatsr-scaled.jpg?fit=2560%2C755&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p6XU0A-4b9","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts\/16067","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/comments?post=16067"}],"version-history":[{"count":0,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts\/16067\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/media\/16064"}],"wp:attachment":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/media?parent=16067"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/categories?post=16067"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/tags?post=16067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}