tian/robot_face_rec
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压缩二维码图片尺寸

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Tian jianyong 2025-12-28 14:51:18 +08:00
parent be9d9ca88d
commit d53d5be8d1
1 changed files with 16 additions and 13 deletions
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face_rec.py
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@ -692,9 +692,17 @@ class FaceRecognitionSystem:
# 获取二维码图片尺寸
qr_height, qr_width = qr_image.shape[:2]
# 使用屏幕缓存尺寸，如果获取失败则使用图片尺寸
canvas_width = self.screen_width if self.screen_width > 0 else qr_width
canvas_height = self.screen_height if self.screen_height > 0 else qr_height
# 使用屏幕尺寸，按比例缩放图片
canvas_width = self.screen_width
canvas_height = self.screen_height
# 等比例缩放：保持图片宽高比
scale = min(canvas_width / qr_width, canvas_height / qr_height)
scaled_width = int(qr_width * scale)
scaled_height = int(qr_height * scale)
# 缩放二维码图片
qr_image_scaled = cv2.resize(qr_image, (scaled_width, scaled_height), interpolation=cv2.INTER_LINEAR)
# 创建二维码窗口
cv2.namedWindow(self.qrcode_window_name, cv2.WINDOW_NORMAL | cv2.WINDOW_GUI_NORMAL)
@ -702,24 +710,19 @@ class FaceRecognitionSystem:
x_pos = 0
y_pos = 0
rendered = self._build_qrcode_instruction_canvas(qr_image, (canvas_width, canvas_height))
rendered = self._build_qrcode_instruction_canvas(qr_image_scaled, (canvas_width, canvas_height))
if rendered is None:
# 回退到原二维码展示
scale_width = canvas_width / qr_width
scale_height = canvas_height / qr_height
scale = min(scale_width, scale_height)
new_width = int(qr_width * scale)
new_height = int(qr_height * scale)
resized_qr = cv2.resize(qr_image, (new_width, new_height), interpolation=cv2.INTER_LINEAR)
resized_qr = qr_image_scaled
# 创建背景画布
rendered = np.zeros((canvas_height, canvas_width, 3), dtype=np.uint8)
# 计算居中位置
x_offset = (canvas_width - new_width) // 2
y_offset = (canvas_height - new_height) // 2
x_offset = (canvas_width - scaled_width) // 2
y_offset = (canvas_height - scaled_height) // 2
rendered[y_offset:y_offset+new_height, x_offset:x_offset+new_width] = resized_qr
rendered[y_offset:y_offset+scaled_height, x_offset:x_offset+scaled_width] = resized_qr
cv2.resizeWindow(self.qrcode_window_name, canvas_width, canvas_height)
cv2.moveWindow(self.qrcode_window_name, x_pos, y_pos)