Motorola Mobility LLC

Dalong Li

Daniel Maack Bloom

Jing-Nan Zhu

For selective local registration based on registration error, a method determines a first registration error between a template image and a source image. The method further warps the source image to compensate for camera motion in response to the first registration error exceeding a registration error threshold. In addition, the method determines a second registration error between the template image and the warped source image. The method generates a pixel difference mask using the template image. The method further selectively performs local registration for the source image based on the pixel difference mask in response to the second registration error exceeding the registration error threshold.

Selective local registration based on registration error

For deblurring an image, a method records both short-exposed pixels at a higher frame rate for a short-exposure region and normal-exposed pixels at a normal frame rate for full resolution. In addition, the method deblurs a normal-exposed image as a function of the short-exposed pixels and the normal-exposed pixels.

Deblurring an image

The present application provides an image processing circuit, a hand-held electronic device and a method for compensating for motion in an image received by an image sensor. The method includes sub-dividing an array of individual sensor cells from an image sensor adapted for receiving an image into at least a first sub-group and a second sub-group of sensor cells. Multiple timing signals are then generated for use in reading data out of the individual sensor cells of the image sensor. Data values are then read out from the individual sensor cells, wherein the data values from the individual sensor cells of the first sub-group of sensor cells are read out at a first rate using a first timing signal, and the data values from the individual sensor cells of the second sub-group of sensor cells are read out at a second rate using a second timing signal. The second rate is different than the first rate, where the sensor cells in the second sub-group of sensor cells are sampled more frequently than the sensor cells in the first sub-group of sensor cells. Motion of the image sensor is then determined from the data values read out of the individual sensor cells of the second sub-group of sensor cells. The image derived from the data values read out of the individual sensor cells of the first sub-group of sensor cells is then modified using the motion detected for producing a processed image.

Image processing circuit, hand-held electronic device and method for compensating for motion in an image received by an image sensor

For calculating a sharpness value, a method filters an image with an edge extraction filter to generate filtered pixel values for each pixel of the image. The method further calculates a sharpness threshold as a function of the filtered pixel values. In addition, the method calculates a sharpness weight for each filtered pixel value as a function of the filtered pixel value and the sharpness threshold. The method calculates a weighted pixel value for each filtered pixel value as a function of the filtered pixel value and the corresponding sharpness weight for the filtered pixel value. The method further calculates a sharpness value for the image as a function of the weighted pixel values.

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Naperville, IL, United States of America

Dalong Li