diff --git a/ofdgo_reader.go b/ofdgo_reader.go
index a42b895..284212d 100644
--- a/ofdgo_reader.go
+++ b/ofdgo_reader.go
@@ -38,6 +38,7 @@ type Reader struct {
 	Stamps                    map[string][]Stamp
 	Annots                    map[string][]Annotation
 	fileIndex                 map[string]*zip.File
+	fileIndexFold             map[string]*zip.File
 }
 
 // Close 关闭阅读器
@@ -53,9 +54,14 @@ func (r *Reader) Close() error {
 // 返回: error 错误信息
 func (r *Reader) initRoot() error {
 	r.fileIndex = make(map[string]*zip.File)
+	r.fileIndexFold = make(map[string]*zip.File)
 	for _, f := range r.Zip.File {
 		name := cleanPackagePath(f.Name)
 		r.fileIndex[name] = f
+		fold := strings.ToLower(name)
+		if _, ok := r.fileIndexFold[fold]; !ok {
+			r.fileIndexFold[fold] = f
+		}
 	}
 	data, err := r.readFile("OFD.xml")
 	if err != nil {
@@ -111,6 +117,9 @@ func (r *Reader) packageFile(name string) (*zip.File, bool) {
 	if f, ok := r.fileIndex[name]; ok {
 		return f, true
 	}
+	if f, ok := r.fileIndexFold[strings.ToLower(name)]; ok {
+		return f, true
+	}
 	return nil, false
 }
 
diff --git a/ofdgo_renderer.go b/ofdgo_renderer.go
index d61c2ac..926042f 100644
--- a/ofdgo_renderer.go
+++ b/ofdgo_renderer.go
@@ -38,6 +38,7 @@ type Renderer struct {
 	templatePageCache     map[string]*PageContent
 	fontDirs              []string
 	fontFS                []fs.FS
+	decodeImages          bool
 }
 
 // RendererOption 渲染器配置选项
@@ -168,5 +169,7 @@ func (r *Renderer) childRenderer(reader *Reader) *Renderer {
 	if len(r.fontFS) > 0 {
 		opts = append(opts, WithFontFS(r.fontFS...))
 	}
-	return NewRenderer(reader, opts...)
+	renderer := NewRenderer(reader, opts...)
+	renderer.decodeImages = r.decodeImages
+	return renderer
 }
diff --git a/ofdgo_renderer_image.go b/ofdgo_renderer_image.go
index edac8bd..37b28a1 100644
--- a/ofdgo_renderer_image.go
+++ b/ofdgo_renderer_image.go
@@ -88,10 +88,24 @@ func (r *Renderer) decodeImageResource(resPath string) (image.Image, error) {
 	reader := bufio.NewReaderSize(rc, 8)
 	header, _ := reader.Peek(8)
 	if isJPEGData(header) {
-		return canvasimage.NewJPEGImage(reader)
+		img, err := canvasimage.NewJPEGImage(reader)
+		if err != nil {
+			return nil, err
+		}
+		if r.decodeImages {
+			return img.Image()
+		}
+		return img, nil
 	}
 	if isPNGData(header) {
-		return canvasimage.NewPNGImage(reader)
+		img, err := canvasimage.NewPNGImage(reader)
+		if err != nil {
+			return nil, err
+		}
+		if r.decodeImages {
+			return img.Image()
+		}
+		return img, nil
 	}
 	data, err := io.ReadAll(reader)
 	if err != nil {
diff --git a/ofdgo_renderer_output.go b/ofdgo_renderer_output.go
index 5b5f49f..2ad0de3 100644
--- a/ofdgo_renderer_output.go
+++ b/ofdgo_renderer_output.go
@@ -30,7 +30,9 @@ import (
 // 入参: page 页面内容
 // 返回: image.Image 图像对象, error 错误信息
 func (r *Renderer) RenderToImage(page *PageContent) (image.Image, error) {
-	c, err := r.RenderPage(page)
+	renderer := *r
+	renderer.decodeImages = true
+	c, err := renderer.RenderPage(page)
 	if err != nil {
 		return nil, err
 	}
diff --git a/ofdgo_renderer_stamp.go b/ofdgo_renderer_stamp.go
index b58a304..5843871 100644
--- a/ofdgo_renderer_stamp.go
+++ b/ofdgo_renderer_stamp.go
@@ -63,6 +63,9 @@ func (r *Renderer) renderStamp(ctx *canvas.Context, s Stamp, pageH float64) {
 	if len(s.Data) > 0 {
 		img, _, err := decodeImageData(s.Data)
 		if err == nil {
+			if r.decodeImages {
+				img = imagePixelSource(img)
+			}
 			r.renderStampImage(ctx, stampImageWithTransparentWhite(img), s, pageH)
 			return
 		}
@@ -83,6 +86,7 @@ func (r *Renderer) renderOFDStampImage(data []byte) image.Image {
 		return nil
 	}
 	renderer := r.childRenderer(reader)
+	renderer.decodeImages = true
 	for _, pageRef := range doc.Pages.Page {
 		content, err := reader.PageContent(pageRef)
 		if err != nil {