Browsing by Author "Oliveira, Manuel M."
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Prefilters for Sharp Image Display
Rocha, Luís Cláudio Gouveia; Oliveira, Manuel M.; Gastal, Eduardo S. L. (The Eurographics Association and John Wiley & Sons Ltd., 2020)In this paper we use a simplified model of the human visual system to explain why humans tend do prefer ''sharpened'' digital images. From this model we then derive a family of image prefilters specifically adapted to ... -
Real-Time Frequency Adjustment of Images and Videos
Germano, Rafael L.; Oliveira, Manuel M.; Gastal, Eduardo S. L. (The Eurographics Association and John Wiley & Sons Ltd., 2021)We present a technique for real-time adjustment of spatial frequencies in images and videos. Our method allows for both decreasing and increasing of frequencies, and is orthogonal to image resizing. Thus, it can be used ...