From 3e6e5fa3a41da4e8a42a9341ea4f63e982bd32cd Mon Sep 17 00:00:00 2001
From: Daniel <845765@qq.com>
Date: Sat, 17 Jan 2026 10:45:04 +0800
Subject: [PATCH] :art: Improve image export size for database assets fields
 https://github.com/siyuan-note/siyuan/issues/16470

Signed-off-by: Daniel <845765@qq.com>
---
 kernel/model/assets.go | 18 ++++++++++++++++++
 kernel/model/export.go | 12 ++++++++----
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/kernel/model/assets.go b/kernel/model/assets.go
index 15de3f68b..5f6dfdabf 100644
--- a/kernel/model/assets.go
+++ b/kernel/model/assets.go
@@ -51,6 +51,24 @@ import (
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
 
+func GetAssetImgSize(assetPath string) (width, height int) {
+	absPath, err := GetAssetAbsPath(assetPath)
+	if err != nil {
+		logging.LogErrorf("get asset [%s] abs path failed: %s", assetPath, err)
+		return
+	}
+
+	img, err := imaging.Open(absPath)
+	if err != nil {
+		logging.LogErrorf("open asset image [%s] failed: %s", absPath, err)
+		return
+	}
+
+	width = img.Bounds().Dx()
+	height = img.Bounds().Dy()
+	return
+}
+
 func GetAssetPathByHash(hash string) string {
 	assetHash := cache.GetAssetHash(hash)
 	if nil == assetHash {
diff --git a/kernel/model/export.go b/kernel/model/export.go
index dc53d7cbe..1c8781d32 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -2831,10 +2831,14 @@ func exportTree(tree *parse.Tree, wysiwyg, keepFold, avHiddenCol bool,
 									img.AppendChild(&ast.Node{Type: ast.NodeLinkDest, Tokens: []byte(a.Content)})
 									img.AppendChild(&ast.Node{Type: ast.NodeCloseParen})
 									mdTableCell.AppendChild(img)
-									height := "height: 128px;"
-									spanIAL := &ast.Node{Type: ast.NodeKramdownSpanIAL, Tokens: []byte("style=\"" + height + "\"")}
-									mdTableCell.AppendChild(spanIAL)
-									img.SetIALAttr("style", height)
+									img.SetIALAttr("style", "max-height: 128px;")
+
+									width, height := GetAssetImgSize(a.Content)
+									if height > 128 {
+										img.SetIALAttr("height", "128px")
+										newWidth := int(float64(width) * (128.0 / float64(height)))
+										img.SetIALAttr("width", strconv.Itoa(newWidth)+"px")
+									}
 								} else if av.AssetTypeFile == a.Type {
 									linkText := strings.TrimSpace(a.Name)
 									if "" == linkText {