A filter that blocks low frequencies and allows higher frequencies to pass through. Such filters are used in devices such as POTS splitters that direct phone and DSL signals to different lines.

But by applying the High Pass Filter in Photoshop CC, you can selectively paint a sharpening effect onto your images. This means you can choose where to sharpen your image, likely your focal point.

Utilize analog and digital signal processing techniques in building a low-cost high-precision digital oscilloscope for high ...

The simulation shows that the filter behaves as expected. As field programmable gate array (FPGA) technology has steadily improved, FPGAs have become alternatives to other technology implementations ...