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US 5,309,183 AGranted
Image pickup apparatus having difference encoding and non-linear processing of image signals
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Sasaki, Izuru Horiuchi
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Abstract
An image pickup apparatus having difference encoding and non-linear processing of image signals includes a difference encoding circuit for quantizing a difference between signals from adjacent pixels, every other pixel, or pixels having a same color filter, in a solid-state image pickup element. A non-linear processing circuit non-linearly processes the output from the difference encoding circuit. An apparatus main body has an output terminal for supplying an output from the non-linear processing circuit, and a storage body capable of recording the output from the apparatus output terminal is coupled to the main body.
Claims13
An image pickup apparatus comprising:
- difference encoding means for quantizing a difference between signals from every other pixel in a solid-state image pickup element;
- non-linear processing means for non-linearly processing an output from said difference encoding means with a predetermined non-linear processing characteristic;
- A/D conversion means for A/D converting an output of said non-linear processing means with a predetermined conversion characteristic, said predetermined non-linear processing characteristic of said non-linear processing means being set according to said predetermined conversion characteristic of said A/D conversion means;
- an apparatus main body having an apparatus output terminal for supplying an output from said A/D conversion means;
- and
- a storage body capable of recording the output from said apparatus output terminal of said apparatus main body.
3 more elements
An image pickup apparatus comprising:
- a solid-state image pickup element provided with a plurality of color filters;
- difference encoding means for quantizing a difference between signals from pixels of the same kind of adjacent filters in a horizontal scanning direction of said solid-state image pickup element;
- non-linear processing means for non-linearly processing an output from said difference encoding means with a predetermined non-linear processing characteristic;
- A/D conversion means for A/D converting an output of said non-linear processing means with a predetermined conversion characteristic, said predetermined non-linear processing characteristic of said non-linear processing means being set according to said predetermined conversion characteristic of said A/D conversion means;
- an apparatus main body having an apparatus output terminal for supplying an output from said A/D conversion means;
- and
- a storage body capable of recording the output from said apparatus output terminal of said apparatus main body.
4 more elements
A digital signal processing apparatus comprising:
- difference signal forming means for receiving signals from a solid-state image pickup element provided with complementary color filters and forming a signal corresponding to a difference between signals from adjacent pixels;
- a non-linear processing means for non-linearly processing an output from said difference signal forming means;
- A/D conversion means for A/D-converting an output from said non-linear processing means;
- a memory for storing first- and second-system signals as outputs from said A/D conversion means;
- first addition means for adding the first- and second-system signals sequentially read out from said memory, and outputting line sequential color difference signals;
- first inverting means for inverting a polarity of the first-system signals sequentially read out from said memory;
- second inverting means for inverting a polarity of the second-system signals sequentially read out from said memory;
- first selection means for switching and selecting the first-system signals sequentially read out from said memory and outputs from said first inverting means in units of pixels;
- second selection means for switching and selecting the second-system signals sequentially read out from said memory and outputs from said second inverting means in units of pixels;
- first decoding means for decoding the outputs from said first selection means;
- second decoding means for decoding the outputs from said second selection means;
- and
- second addition means for adding the outputs from said first and second decoding means to output a luminance signal.
10 more elements
A digital signal process apparatus comprising:
- encoding means for non-linearly processing, with a predetermined non-linear processing characteristic, a signal corresponding to a difference between signals from pixels adjacent to each other, and for A/D-converting the non-linearly processed signal with a predetermined conversion characteristic, said predetermined non-linear processing characteristic being set according to said predetermined conversion characteristic;
- a memory for storing an output from said encoding means;
- means for forming a color difference signal on the basis of an output from said memory;
- and
- means for decoding the output from said memory to form a luminance signal.
2 more elements
A signal process apparatus comprising a plurality of sets of channels, each of which includes:
- means for sampling and holding signals from spatially adjacent pixels to which the same kind of color filters are attached;
- and
- DPCM-type A/D-conversion means for, in accordance with a predetermined non-linear processing characteristic, non-linearly processing a difference between outputs from said sampling and holding means, and for A/D converting, in accordance with a predetermined conversion characteristic, the non-linearly processed difference, said predetermined non-linear processing characteristic being set in accordance with the predetermined conversion characteristic of said A/D conversion means.
Dependencies are inferred from the claim text.