From bc4c95c18c69d92921f6a1586c8b47839313e4e0 Mon Sep 17 00:00:00 2001
From: liuyebo <1515783401@qq.com>
Date: Fri, 12 Sep 2025 14:40:52 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=88=A4=E6=96=AD=E6=88=AA?=
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---
 util/image_util.py | 58 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/util/image_util.py b/util/image_util.py
index 31a29da..f1949cc 100644
--- a/util/image_util.py
+++ b/util/image_util.py
@@ -268,3 +268,61 @@ def parse_clarity(image):
     except Exception as e:
         logging.error("获取图片清晰度失败", exc_info=e)
     return clarity_result
+
+
+def is_photo_by_exif(exif_tags):
+    """分析EXIF数据判断是否为照片"""
+    # 照片通常包含的EXIF标签
+    photo_tags = [
+        'FNumber',  # 光圈
+        'ExposureTime',  # 曝光时间
+        'ISOSpeedRatings',  # ISO
+        'FocalLength',  # 焦距
+        'LensModel',  # 镜头型号
+        'GPSLatitude'  # GPS位置信息
+    ]
+
+    # 统计照片相关的EXIF标签数量
+    photo_tag_count = 0
+    if exif_tags:
+        for tag in photo_tags:
+            if tag in exif_tags:
+                photo_tag_count += 1
+                # 如果有2个以上照片相关的EXIF标签，倾向于是照片
+                if photo_tag_count >= 2:
+                    return True
+    # 不确定是照片返回False
+    return False
+
+
+def is_screenshot_by_image_features(image):
+    """分析图像特征判断是否为截图"""
+    # 定义边缘像素标准差阈值，小于此阈值则认为图片是截图
+    edge_std_threshold = 20.0
+    try:
+        # 检查边缘像素的一致性（截图边缘通常更整齐）
+        edge_pixels = []
+        # 取图像边缘10像素
+        edge_pixels.extend(image[:10, :].flatten())  # 顶部边缘
+        edge_pixels.extend(image[-10:, :].flatten())  # 底部边缘
+        edge_pixels.extend(image[:, :10].flatten())  # 左侧边缘
+        edge_pixels.extend(image[:, -10:].flatten())  # 右侧边缘
+
+        # 计算边缘像素的标准差（值越小说明越一致）
+        edge_std = numpy.std(edge_pixels)
+        logging.info(f"边缘像素标准差: {edge_std}")
+        return edge_std < edge_std_threshold
+    except Exception as e:
+        logging.error("图像特征分析失败", exc_info=e)
+        return False
+
+
+def is_screenshot(image, exif_tags):
+    """综合判断是否是截图"""
+    # 先检查EXIF数据
+    result_of_exif = is_photo_by_exif(exif_tags)
+    # 如果有明显的照片EXIF信息，直接判断为照片
+    if result_of_exif:
+        return False
+    # 分析图像特征
+    return is_screenshot_by_image_features(image)