基于区域特征的定位方法在车牌识别中的应用

车牌定位是车牌识别中的关键部分。由于拍摄角度以及环境的不同,不同车牌图像的亮度、灰度以及纹理会有比较大的差异。基于区域特征的定位方法综合了图像区域的细节和整体特征,因而有良好的适用性,试验的结果也证明了这一点。     

Labeling Context and Reference Point Effects in Models of Food Attribute Demand

There is considerable interest in the effect of labels on food product demand. Labeling statements may convey new information about attributes and place consumers in different choice contexts; consumers' assessment of information in labels may be affected by reference points. We examine labeling context relating to genetically modified (GM) food as a factor in the stochastic component of a random utility model and assess reference points over a set of observable characteristics of consumers. We find that labeling context effects are present, although relatively small, while reference dependence is a very important factor that varies over observable characteristics of the sampled consumers.     

Why U.S. Consumers Support Country of Origin Labeling: Examining the Impact of Ethnocentrism and Food Safety

ABSTRACT

The legality of U.S. country of origin labeling (COOL) laws for agricultural products has been challenged by foreign countries. Isolating the reasons why consumers support COOL can help determine the efficiency of COOL as a policy. Therefore, this study investigated why consumers have a desire for COOL. Data were collected through an online survey with 566 U.S. participants. Results of a bivariate ordered probit model indicate that as consumers are more ethnocentric and more pessimistic about the safety of their food, they are more likely to support COOL for sugar and for sugar in soft drinks. Thus, policies designed to inform the public about the safety of foreign commodities could reduce their desire for COOL. Evidence is also provided that highly ethnocentric individuals support COOL in an effort to “buy American” products.     

Health and Environmental Consciousness

Abstract

A serious diversification of Greek consumers' food buying behavior can be observed during the last decade. Following similar trends worldwide, an important percentage of Greek consumers have been oriented to quality food products of higher added value. This value is delivered through the implementation of various certification strategies and the use of different communication messages. A study of the procedure through which Greek consumers evaluate a variety of quality certification schemes is, hence, necessary and valuable. In the present survey, a stratified sample of urban consumers is used with the objective to analyze their attitudes toward the organic label and the HACCP and ISO14000 certification schemes separately. The study evolves around the assumption that purchasing of organic, HACCP or ISO14000-certified food products expresses consumers' health and environmental consciousness and reflects the food industry's ethical concern.     

Perceived Motives,Barriers and Role of Labeling Information on Tropical Fruit Consumption: Exploratory Findings

This article reports findings from an exploratory study about tropical fruit consumption in Belgium. The aim of this study is to identify motives and barriers for the consumption of fresh tropical fruits and their juices. Also the potential role of labeling information, more specifically process-related quality labeling for fresh tropical fruits, and on-label nutrition and health claims for tropical fruit juices, are investigated. This study indicates that pleasure-seeking and hedonism motives are major drivers, whereas high perceived price and unfamiliarity form the most prominent barriers for consuming tropical fruit and tropical fruit juices. Process-related quality labels are considered credible and persuasive, but the expected price premium hampers the purchase of process-certified tropical fruit products. Health and nutrition claims on tropical fruit juices are not believed to be persuasive unless they match well with the perceived naturalness of the juices.     

Consumers’ perception of reduced calorie meals: How low is “Low-Calorie”?

ABSTRACT

With consumers becoming increasingly health conscious, the demand for reduced calorie food has significantly increased over the years. However, the definition of low-calorie food remains unclear. Therefore, the purpose of this study was to investigate consumers’ perception of reduced calorie meals, from the perspective of the maximum calorie level that consumers would consider as “low-calorie.” Survey data were collected using MTurk. In addition to respondents’ perception of the calorie count of low-calorie food when eating out and eating at home, respondents’ attitude toward low-calorie food, behaviors about consuming low-calorie food and exercise frequency, and demographic information were also assessed in the survey. The results demonstrate that consumers’ calorie perception of low-calorie food served in restaurants is consistent among different types of restaurants. Moreover, consumers believe that a low-calorie meal served in restaurants should be under 367 calories for breakfast, 500 calories for lunch, and 677 calories for dinner. Lastly, consumers perceive home-cooked meals to be lower in calories than restaurant food. This study is the first attempt to explore consumers’ definition of a low-calorie meal served in restaurants. The findings will provide guidance to restaurant operators in designing menus, and help policymakers better understand the ongoing need to develop a sound and comprehensive definition for the term “low-calorie.”     

Does food processing mitigate consumers’ concerns about crops grown with recycled water?

This paper presents results from a field experiment designed to evaluate whether food processing alleviates consumers’ concerns about crops grown with recycled water. Recycled water has emerged as a potentially safe and cost-effective way to replace or supplement traditional irrigation water. However, adoption of recycled water by U.S. agricultural producers has been modest, in part, because of concerns that consumers will be reluctant to accept their products. Our results suggest that simple processing of foods such as drying or liquefying can relieve some of consumers’ concerns about use of recycled irrigation water. While consumers of processed foods are indifferent between irrigation with recycled and conventional water, they are less willing to pay for fresh foods irrigated with recycled water relative to conventional water. We also found that consumers would experience a welfare gain from a labeling policy communicating the use of recycled irrigation water on both processed and fresh foods. Our analysis further reveals that informational nudges that provide consumers with messages about benefits, risks, and both the benefits and risks of using recycled water have no statistically significant effect on consumers’ willingness to pay for fresh and processed foods irrigated with recycled water relative to a no-information control group.