US 11,812,168 B2
Imaging devices with image transform circuitry for improved motion detection
Alexander Lu, San Jose, CA (US); and Kuang-Yen Lin, Taipei (TW)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Jan. 7, 2020, as Appl. No. 16/735,974.
Prior Publication US 2021/0211594 A1, Jul. 8, 2021
Int. Cl. H04N 25/50 (2023.01); G06T 7/00 (2017.01); G06T 7/262 (2017.01)
CPC H04N 25/50 (2023.01) [G06T 7/262 (2017.01); G06T 7/97 (2017.01)] 15 Claims
OG exemplary drawing
 
1. An imaging device configured to generate images in response to incident light, the imaging device comprising:
an image sensor having an array of pixels configured to generate frames of image data in response to the incident light; and
processing circuitry configured to process the frames of image data, the processing circuitry comprising:
a transformation circuit configured to transform each frame of image data to produce a respective transform value, wherein the transformation circuit is configured to apply a discrete cosine transform to the frame of image data to produce the respective transform value, and
a comparator circuit configured to compare the respective transform value to a transform value corresponding to a previous frame of image data.