Device for correcting and compressing image error data, and method related thereto
An electronic device includes a processor, and an image sensor module, wherein the image sensor module may include an image sensor, and a control circuit electrically connected to the image sensor and connected to the processor through an interface, and wherein the control circuit may obtain raw image data through the image sensor, sense at least one pixel data included in the raw image data and at least one error data based on a difference between pixel values of the at least one pixel data and each of at least one other pixel data adjacent to the at least one pixel data, generate attribute information corresponding to the at least one error data, correct the at least one error data based on a specified scheme, compress the raw image data in which the at least one error data are corrected, and transmit the compressed raw image data and the attribute information to the processor.
1. An electronic device comprising:
an image signal processor (ISP); and
an image sensor module,
wherein the image sensor module includes:
an image sensor;
a correction circuit for correcting image data obtained through the image sensor;
an encoder; and
a transmitter,
wherein the image sensor is configured to obtain raw image data,
wherein the correction circuit is configured to:
sense at least one pixel data included in the raw image data and at least one error data based on a difference between pixel values of the at least one pixel data and each of a plurality of other pixel data adjacent to the at least one pixel data,
generate attribute information corresponding to the at least one error data, and
correct the at least one error data based on a specified scheme,
wherein the encoder is configured to compress the raw image data in which the at least one error data are corrected, and
wherein the transmitter is configured to transmit the compressed raw image data and the attribute information to the image signal processor.
2. The electronic device of claim 1 , wherein the correction circuit is configured to generate flag data corresponding to a location of the at least one error data as at least a part of the attribute information.
3. The electronic device of claim 1 , wherein the image signal processor is configured to:
restore the compressed raw image data, and
restore the corrected at least one error data based on the attribute information.
4. The electronic device of claim 1 , wherein the image signal processor is configured to correct the at least one error data based on the attribute information by using a scheme at least partially different from the specified scheme.
5. The electronic device of claim 1 , wherein the specified scheme includes the steps of:
select a plurality of pixel pairs from the plurality of other pixel data adjacent to the at least one pixel data,
calculate a difference in pixel value for each of the plurality of pixel pairs,
select a pixel pair in the plurality of pixel pairs having a smallest difference,
calculate an average pixel value for the selected pixel pair, and
replace the pixel value of the at least one pixel data with the average pixel value.
6. The electronic device of claim 1 , wherein the correction circuit is configured to:
compress the attribute information in a specified compression scheme, and
transmit the compressed attribute information to the image signal processor.
7. The electronic device of claim 6 , wherein the correction circuit is configured to:
determine a run value corresponding to the at least one error data based on the attribute information,
binarize the attribute information based on the determined run value, and
compress the binarized attribute information.
8. The electronic device of claim 7 , wherein the correction circuit is configured to binarize the attribute information by using at least one of k-th-order exponential Golomb, unary, truncation unary, and Gollum rice techniques.
9. An image sensor module comprising:
an image sensor configured to generate image data corresponding to light reflected or generated from a subject;
a correction circuit configured to sense at least one pixel data included in the image data and at least one error data based on a difference between pixel values of he at least one pixel data and each of a plurality of other pixel data adjacent to the at least one pixel data, and correct the at least one error data based on a specified scheme;
an encoder configured to compress the image data in which the at least one error data are corrected; and
a transmitter configured to transmit the compressed image data to an image signal processor connected to the image sensor module through an interface.
10. The image sensor module of claim 9 , wherein the encoder includes the correction circuit.
11. The image sensor module of claim 9 , wherein the correction circuit is configured to generate attribute information corresponding to the at least one error data, and
wherein the transmitter is configured to transmit the attribute information to the image signal processor.
12. The image sensor module of claim 11 , wherein the correction circuit is configured to generate flag data corresponding to a location of the at least one error data as at least a part of the attribute information.
13. The image sensor module of claim 11 , wherein the encoder is configured to compress the attribute information,
wherein the transmitter is configured to transmit the compressed attribute information to the image signal processor.
14. The image sensor module of claim 13 , wherein the encoder is configured to:
identify a run value of the at least one error data,
binarize the attribute information based on the run value, and
compress the binarized attribute information.