Solid-state imaging device and electronic device
A decrease in event detection efficiency is suppressed. A solid-state imaging device according to an embodiment includes a pixel array unit ( 101 ) in which a plurality of pixels each detecting a change in luminance of incident light is disposed in a two-dimensional lattice pattern, a signal processing unit ( 103 ) that generates first event data including position information about one or more pixels that detect a change in luminance, an adjustment unit ( 320 ) that adjusts an amount of data of the first event data to generate second event data, and an output unit ( 109 ) that outputs the second event data to an outside, wherein the adjustment unit includes a plurality of paths that adjusts the amount of data of the first event data by respective different methods to generate the second event data, and wherein the output unit outputs at least one of the second event data output from the plurality of respective paths to the outside.
1. A solid-state imaging device including:
a pixel array unit in which a plurality of pixels each detecting a change in luminance of incident light is disposed in a two-dimensional lattice pattern;
a signal processing unit that generates first event data including position information about one or more pixels that detect a change in luminance;
an adjustment unit that adjusts an amount of data of the first event data to generate second event data; and
an output unit that outputs the second event data, wherein
the adjustment unit includes a plurality of paths that respectively adjust the amount of data of the first event data by respective different methods to generate instances of adjusted second event data, and wherein the output unit outputs at least one of the instances of adjusted second event data output from the plurality of paths.
2. The solid-state imaging device according to claim 1 , wherein the plurality of paths includes one or more first paths that generate one or more of the instances of adjusted second event data by respectively coding the first event data.
3. The solid-state imaging device according to claim 2 , wherein the one or more first paths include a path that codes the first event data by using at least one of Hcomp coding, Run Length coding, Huffman coding, Light Huffman coding, Event Distance coding, and Entropy coding.
4. The solid-state imaging device according to claim 1 , wherein the plurality of paths includes one or more second paths that generate one or more of the instances of second event data by respectively performing a signal process on the first event data.
5. The solid-state imaging device according to claim 4 , wherein the one or more second paths include a path that performs a signal process on the first event data using at least one of optical flow calculation, feature point extraction, and region of interest (ROI) extraction.
6. The solid-state imaging device according to claim 1 , wherein the plurality of paths includes a third path that outputs the first event data unadjusted.
7. The solid-state imaging device according to claim 1 , wherein the adjustment unit inputs the first event data generated by the signal processing unit to the plurality of paths and inputs the instances of adjusted second event data to the output unit.
8. The solid-state imaging device according to claim 7 , wherein the output unit outputs a given instance of adjusted second event data with an amount of data not exceeding a transmission band among the instances of adjusted second event data.
9. The solid-state imaging device according to claim 7 , wherein the output unit outputs a given instance of adjusted second event data with a smallest amount of data among the instances of adjusted second event data.
10. The solid-state imaging device according to claim 1 , further including:
a determination unit that determines a scene based on the first event data, wherein
the determination unit inputs the first event data to at least one path of the plurality of paths based on the scene determined based on the first event data.
11. The solid-state imaging device according to claim 1 , wherein the output unit outputs the second event data in frame.
12. The solid-state imaging device according to claim 11 , wherein the output unit outputs frame data in which a data length of each line is adjusted by the adjustment unit.
13. The solid-state imaging device according to claim 11 , wherein the output unit outputs frame data not including line data of a line in which a pixel in which a change in luminance of incident light is detected does not exist.
14. The solid-state imaging device according to claim 11 , wherein the output unit outputs a horizontal synchronization signal as soon as an output of line data of each line is completed.
15. An electronic device including:
a solid-state imaging device according to claim 1 ; and
an information processing device that processes second event data output from the solid-state imaging device.