Jing Wang

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Capturing surface appearance is a challenging task because reflectance varies as a function of viewing and illumination direction. In addition, most real-world surfaces have a textured appearance, so reflectance also varies spatially. We present a texture camera that can conveniently capture spatially varying reflectance on a surface. Unlike other(More)
The slash distribution is often used as a challenging distribution for a statistical procedure. In this article, we define a skewed version of the slash distribution in the multivariate setting and derive several of its properties. The multivariate skew-slash distribution is shown to be easy to simulate from and can therefore be used in simulation studies.(More)
In vision and graphics, advanced object models require not only 3D shape, but also surface detail. While several scanning devices exist to capture the global shape of an object, few methods concentrate on capturing the fine-scale detail. Fine-scale surface geometry (relief texture), such as surface markings, roughness, and imprints, is essential in highly(More)
Two very linear ramp-generator designs are presented. The circuits are to be used in high-resolution ADC built-in-self-test (BIST) and on-chip calibration. The first design is to charge a capacitor by a small current, which is linear enough to test 14-bit ADCs. The second design is in a relaxation oscillator architecture. It is linear enough to test up to(More)
The appearance of surface texture as it varies with angular changes of view and illumination is becoming an increasingly important research topic. The bidirectional texture function (BTF) is used in surface modeling because it describes observed image texture as a function of imaging parameters. The BTF has no geometric information, as it is based solely on(More)
An OTA with a feedforward compensation scheme uses positive phase shifl of Left Half plane (LHP) zeros created by a feedforward path to cancel the negative phase shift of poles, thereby overcoming the limitations of traditional Miller compensation schemes. The OTA is used in the design of a fourth order switched capacitor bandpass XA modulator with the IF(More)
Having been demonstrated at frequencies up to 6.2 GHz with measured Q's > 4,000, micromechanical resonators hold great promise for enabling on-chip high-Q passives needed in wireless communication systems. However, the acceptance of such devices in present-day transceivers has been hindered by their excessive motional impedances and feedthrough(More)
The employment of the diamagnetic levitation strategy by MEMS inertial sensors and energy scavengers is analyzed as an alternative to traditional mechanical suspensions, with special focus on performance improvements in accuracy and efficiency. The basics of the diamagnetic levitation are described. Both analytical and numerical simulation approaches are(More)