Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-1736, USA.
Eur J Clin Nutr. 2011 Oct;65(10):1156-62. doi: 10.1038/ejcn.2011.75. Epub 2011 May 18.
BACKGROUND/OBJECTIVES: The accuracy of dietary recalls might be enhanced by providing participants with photo images of foods they consumed during the test period.
SUBJECTS/METHODS: We examined the feasibility of a system (Image-Diet Day) that is a user-initiated camera-equipped mobile phone that is programmed to automatically capture and transmit images to a secure website in conjunction with computer-assisted, multipass, 24-h dietary recalls in 14 participants during 2007. Participants used the device during eating periods on each of the three independent days. Image processing filters successfully eliminated underexposed, overexposed and blurry images. The captured images were accessed by the participants using the ImageViewer software while completing the 24-h dietary recall on the following day.
None of the participants reported difficulty using the ImageViewer. Images were deemed 'helpful' or 'sort of helpful' by 93% of participants. A majority (79%) of users reported having no technical problems, but 71% rated the burden of wearing the device as somewhat to very difficult, owing to issues such as limited battery life, self-consciousness about wearing the device in public and concerns about the field of view of the camera.
Overall, these findings suggest that automated imaging is a promising technology to facilitate dietary recall. The challenge of managing the thousands of images generated can be met. Smaller devices with a broader field of view may aid in overcoming self-consciousness of the user with using or wearing the device.
背景/目的：通过向参与者提供他们在测试期间所食用食物的照片，可以提高饮食回忆的准确性。
受试者/方法：我们研究了一种系统（Image-Diet Day）的可行性，该系统是一个用户启动的、配备摄像头的移动电话，与计算机辅助、多遍、24 小时饮食回忆相结合，在 2007 年期间对 14 名参与者进行了测试。参与者在三天中的每一次独立进食期间都使用该设备。图像处理滤波器成功地消除了曝光不足、曝光过度和模糊的图像。参与者在第二天完成 24 小时饮食回忆时，可以使用 ImageViewer 软件访问捕获的图像。
没有参与者报告使用 ImageViewer 有困难。93%的参与者认为图像“有帮助”或“有点帮助”。大多数（79%）用户报告没有技术问题，但 71%的用户认为佩戴设备的负担有点到非常困难，原因是电池寿命有限、在公共场合佩戴设备时感到不自在以及担心相机的视野。
总的来说，这些发现表明自动成像技术是一种很有前途的辅助饮食回忆的方法。管理数千张生成的图像的挑战是可以克服的。具有更宽视野的更小设备可能有助于克服用户使用或佩戴设备时的自我意识。
