from PIL import Image def convert_image3(image_path, width_mm, height_mm, dpi): # 打开原始图片 image = Image.open(image_path) # 计算目标像素尺寸 width_px = int(width_mm / 25.4 * dpi) height_px = int(height_mm / 25.4 * dpi) # 调整图片尺寸 resized_image = image.resize((width_px, height_px)) # 保存调整后的图片 resized_image.save(r'D:\temp\zcy21ok_3.jpg') print('over') def get_physical_size(image_path): # 打开图片 with Image.open(image_path) as img: # 获取像素尺寸 width, height = img.size # 尝试获取DPI信息 dpi = 300 # 如果DPI信息存在,则计算物理尺寸 if dpi: # DPI通常是一个元组,包含水平和垂直方向的DPI dpi_x, dpi_y = 300, 300 # 计算物理尺寸(以英寸为单位) physical_width_inches = width / dpi_x physical_height_inches = height / dpi_y # 转换为毫米(1英寸 = 25.4毫米) physical_width_mm = physical_width_inches * 25.4 physical_height_mm = physical_height_inches * 25.4 return (physical_width_mm, physical_height_mm) else: # 如果DPI信息不存在,则返回None return None if __name__ == '__main__': # 调用函数进行转换,传入参数:图片路径、目标宽度(毫米)、目标高度(毫米)、目标宽度(像素)、目标高度(像素) # convert_image(r'D:\temp\zcy21ok.jpg', 35, 49, 413, 579) # 调用函数进行转换,传入参数:图片路径、目标宽度(毫米)、目标高度(毫米)、像素密度(dpi) convert_image3(r'D:\temp\zcy21ok.jpg', 35, 49, 300) # 测试 image_path = r'D:\temp\zcy21ok_3.jpg' print(get_physical_size(image_path))
标签:mm,image,height,照片,width,尺寸,调整,dpi,physical From: https://www.cnblogs.com/testzcy/p/17993796