Stereoscopic image systems based on binocular parallax can present a stereo pair of images with significant binocular parallax. However, if such parallax often approaches or exceeds the viewer's fusional limit, eye strain or fatigue may result. lt is necessary to assess the fusional limits of many people in order to design stereoscopic image systems. We studied how to measure the limits of many people without any additional correction of visual function from the ordinary because of the idea that the variation of the visual function of many people is one of the factors in the distribution of fusional limits.
We are investigating psychophysics for Extra High Quality Imaging System. In this report, we have investigated an EEG(Electroencephalogram)by a comparison between Extra high quality images and conventional quality images where are corrected and quantization is 12bits in the Extra hige quality images. As a result, an α-EEG around occipital cortex has activated in the Extra high quality images compared to conventional quality images.
Since the final receiver of information of the video system is the observer, the final assessment of the system should be carried out by the observere, which is called as the subjective assessment. In the various factors to that subjctive assessement can be adopted, the picture quality is regarded as the most important one because it showed the overall quality of the system. This report describes recent trends of the subjective picture quality assessment method including the method for degital pictures.
In recent years the recognition of handwritten characters by OCR has been reported to mark as high as 98-99% of accuracy rate. These results were obtained for the characters written in specific boxes or frames carefully. Such a high accuracy rate cannot be expected, however, for broken characters that result from rough printing. In the present paper we compared human readers'recognition ability for poorly handwritten or similar characters with the ability of the character recognition system using neural network(ELNET-II), for two handwritten character databases(ETL9B and IPTP). The experiments showed that human recognition ability was better, in comparison with OCR, especially in recognition of those characters that were broken or written in a cursive style. We can consider that the results depend on the difference of the processing ability of the local fluctuation of character strokes.
In order to investigate the difference of component importance and the integration of component information in facial-expression judgment, an experiment was conducted using the technique of Slit Viewing, in which a whole figure can be seen by moving the figure behind a stationary slit, with controlling the moving direction of face stimulus and the width of slit. The results showed that the accuracy of recognizing sadness and anger faces was more reduced when they moved to upward than when moved to downward. In contrast, happiness and surprise faces produced high accuracy whatever direction they moved to, even when the slit width was narrow. These results indicated that sadness and anger faces were recognized by utilizing the information contained by upper face components. The results also suggest that happy and surprise faces were recognized holistically and integrated more quickly than other faces.
Human faces have structurally changed through growth from childhood to adulthood. Three rating experiments were conducted to investigate whether we can recognize the facial identities between child-faces(about 5 years old)and adult-faces(about 20 years old). Subjects were female undergraduates. All experiments showed the mean rating scores of same person pairs were significantly higher than the ones for different person pairs. These results suggest we can recognize facial identity between child-face and adult-face. Experiment 2 showed familiarity with adult-faces improved the facial identification. In experiment 3, the facial identification improved in the case that both adult-faces and child-faces were judged distinctive.
Children 2, 3 and 4 years of age were assessed on their ability to comprehend emotional labels, and recognize and identify facial expressions of emotion. In a label recognition task, children were presented with four line drawings and were asked to select the picture representing a particular emotion. Four emotions were introduced:happiness, sadness, anger, and surprise. In another task, matching discrimination, children matched photographs of different faces representing different expressions. Results showed that , scores on the label recognition task were significantly better than scores on the matching discrimination task. However the degree of superiority depends on the emotion, suggesting that the process of emotion recognition vary with the emotion. The visual and auditory process model suggested by the findings is discussed.
The purpose of this study was to examine developmental process of line drawing ability in pre-school children. And we succeeded in dividing compound line drawing ability by the drawing completion tasks with occluded objects by pre-school children. As a result. it was found out that children between 5- and 6-year-old explosively developed the ability of memory transfer of the line drawing 2-D image to a plane.