Mitsubishi Denki Kabushiki Kaisha

Yuichi Koshiba

Eiichi Funatsu

Kazuo Kyuma

Kunihiko Hara

Shuichi Tai

Jun Ohta

Yoshikazu Nitta

Takashi Toyoda

Eberhard Lange

An apparatus for sensing and processing images is provided with a photo detector array arranged in a matrix form, a control circuit for feeding a row of the array with voltage for sensitivity control, and a neural network for processing current flowing from a column of the array to the ground in order to obtain an apparatus for sensing and processing images having a simple configuration, a high frame speed, the capability of forming a focus of attention, and high throughput of data and possibility of connecting to the neural network.

Apparatus and method for sensing and processing images

An input value x of floating-point representation is added up with an input value offset by a floating point adder, to be translated to a region where an exponent part is constant. On the basis of an output from the floating point adder, an address decoder generates an address for a lookup table. The lookup table stores only mantissa data in accuracy required for a function value of a necessary nonlinear function. A bit expansion circuit converts a function value read from the lookup table to corresponding numeric data of floating-point representation. The floating point adder subtracts an output value offset and outputs a nonlinear function value of floating-point representation for translating the numeric data received from the bit expansion circuit to its original region. A nonlinear function generator is provided which can efficiently implement nonlinear conversion processing in a digital electronic circuit at a high speed.

Nonlinear function generator having efficient nonlinear conversion table

Growing community of inventors

Hyogo, Japan

Yuichi Koshiba