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The relationship between the tensile properties and δ (delta) phase precipitation in cast alloy IN625 was investigated in this paper. Although the influences of δ phase on the mechanical properties have been pointed out in our previous work, the relationship is still not directly determined due to the coexistence of γ″ (gamma double prime) and δ precipitates. In order to exclude the effect from γ″...
White-RGB (WRGB) color filter array (CFA)-based CMOS sensor is a new and popular technique to improve the image quality directly with a higher sensitivity White (W) filter. Considering there is no color information in the pixel assigned to W, color separation from W raw data is necessary. We propose a color separation method based on a novel physicallike virtual color filters model for the WRGB CFA-based...
In this paper, we propose Adaptive Histogram Equalization (AHE) based contrast enhancement algorithm. Most histogram-based contrast enhancement methods have problems such as excessive contrast enhancement, unnatural output images, and the loss of visual information. The proposed method manipulates the slope of the input of the Probability Density Function (PDF) histogram. Our method adaptively enhances...
Low ambient light conditions usually result in under exposed images for cell phone cameras. This paper proposes a LUT-based histogram matching method to correct the color tone of the under-exposed images. This method can be performed in real-time and does not need frame memory.
In a real-time face recognition system, complex background that occurs in an image or video can degrade the accuracy of both face detection and recognition due to the uncontrolled environment. However, few studies have been proposed to address this issue. In this paper, we propose an adaptive skin color model to make the system more reliable. First, real face region is elected among face-like regions...
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