以實驗策略進行高中影像處理原理教學之研究

Abstract

本研究的目的是希望透過準實驗研究法（quasi-experiment），探討以實驗策略進行教學對高中生學習影像處理原理的影響，並進而設計一套能幫助高中生學習影像處理原理的實驗活動與實驗軟體。本研究參考SIVA系統的實驗軟體模式來設計一套關於影像處理原理的實驗活動及實驗軟體，希望藉實驗活動的進行，提升高中生對影像處理原理之瞭解。 本研究以國立新店高中二年級的143位學生作為研究樣本，並採用實驗組、控制組後測設計，實驗研究的自變項為是否以實驗策略進行教學，依變項是影像處理原理成就測驗的結果，並對測驗結果進行單因子共變數分析。 研究結果發現：一、以實驗策略進行影像處理原理教學有助於提升高中生的學習成效；二、學生對影像處理課的刻板印象為學習影像處理軟體的操作；三、學生普遍肯定以實驗活動策略進行教學，有助於影像處理原理的了解，並且能夠提高其學習興趣；四、本研究所發展的影像處理實驗活動與實驗軟體，可幫助學生進行影像處理原理的學習，作為輔助工具；五、影像處理的遮罩（mask）概念是學生普遍認為較難的部份。This study investigate how lab-based instruction influence senior high school students when learning Image Processing theories. A quasi-experiment was conducted in order to test the lab-based instructional approach. Four classes of 143 senior high school students served as the subjects for this study. Two classes of students were assigned to experiment group (using Image Processing Lab software), the other two classes of students were assigned to control group (not using Image Processing Lab Software). A posttest was administered to compare students’ performance in the two groups. The statistical procedure of ANCOVA was employed to analyze students performance. The final grades of a previous Computer course was used to equate the variance caused by students’ prior knowledge in the statistical analysis. A questionnaire was conducted to collect students’ comments about the lab-based activities.

Five important findings of this study are: (1) lab-based instruction is effective in learning of basic image processing techniques; (2) students had a stereo-typed impression that studying of image processing is to study manipulation of image processing software; (3)Students agreed that lab-based instruction helped them understand the theory and techniques better and that it enhances their learning enthusiasms ; (4) The lab-based image processing package so developed is a good learning aid; (5) Students find that the “mask” operation concept is the most difficult to grasp.