A mobile computing device can comprise a microprocessor, a display, at least one motion sensor, and an imaging device including a two-dimensional image sensor and an imaging lens configured to focus an image of a target object on the image sensor. The mobile computing device can be configured to periodically display a preview image frame of the target object. The mobile computing device can be further configured to compensate for a movement of the imaging device relatively to the target object during a time period elapsed between taking and displaying the preview image frame, by transforming the preview image frame based on the device movement detected by the motion sensor.

Mobile computing device with improved image preview functionality

Systems and methods for local tone mapping are provided. In one example, an electronic device includes an electronic display, an imaging device, and an image signal processor. The electronic display may display images of a first bit depth, and the imaging device may include an image sensor that obtains image data of a higher bit depth than the first bit depth. The image signal processor may process the image data, and may include local tone mapping logic that may apply a spatially varying local tone curve to a pixel of the image data to preserve local contrast when displayed on the display. The local tone mapping logic may smooth the local tone curve applied to the intensity difference between the pixel and another nearby pixel exceeds a threshold.

Systems and methods for local tone mapping

Certain aspects of this disclosure relate to an image signal processing system that includes a flash controller that is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one embodiment, the flash controller receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. Then, the flash controller subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

Flash synchronization using image sensor interface timing signal

Systems and methods for processing image data in RGB format are provided. In one example, an electronic device includes memory to store image data in raw or RGB format, or both, and an RGB image processing pipeline to process the image data. Specifically, the RGB image processing pipeline may process the image data regardless of whether the image data is of raw or RGB format. The RGB image processing pipeline may include receiving logic to receive the image data in raw or RGB format and demosaicing logic to, when the receiving logic receives the image data in raw format, convert the image data into RGB format. The logic may include local tone mapping logic configured to apply spatially varying tone curves to the image data, a color correction matrix configured to correct color in the image data, and gamma logic configured to transform the image data into gamma space.

Systems and methods for rgb image processing

The present disclosure generally relates to systems and methods for image data processing. In certain embodiments, an image processing pipeline may compute noise statistics associated with image data by receiving a frame of the image data having a plurality of pixels. The image processing pipeline may then identify a plurality of portions of the frame of the image data such that each portion of the plurality of portions has a flat surface. The image processing pipeline may then calculate a plurality of gradients for each portion of the plurality of portions, determine one or more dominant gradient orientations for each portion of the plurality of portions, and generate a histogram that represents a plurality of dominant gradient orientations that corresponds to the plurality of portions. After generating the histogram, the image processing pipeline may store the histogram, which may represent the noise statistics, in a memory.

Systems and Methods for Determining Noise Statistics of Image Data

Disclosed embodiments provide for a an image signal processing system 32 that includes back-end pixel processing unit 120 that receives pixel data after being processed by at least one of a front-end pixel processing unit 80 and a pixel processing pipeline 82. In certain embodiments, the back-end processing unit 120 receives luma/chroma image data and may be configured to apply face detection operations, local tone mapping, bright, contrast, color adjustments, as well as scaling. Further, the back-end processing unit 120 may also include a back-end statistics unit 2208 that may collect frequency statistics. The frequency statistics may be provided to an encoder 118 and may be used to determine quantization parameters that are to be applied to an image frame.

System and method for processing image data using an image signal processor having back-end processing logic

The invention discloses a system and a method for processing image data using an image signal processor. Disclosed embodiments provide for a an image signal processing system (32) that includes back-end pixel processing unit (120) that receives pixel data after being processed by at least one of a front-end pixel processing unit (80) and a pixel processing pipeline (82). In certain embodiments, the back-end processing unit (120) receives luma/chroma image data and may be configured to apply face detection operations, local tone mapping, bright, contrast, color adjustments, as well as scaling. Further, the back-end processing unit (120) may also include a back-end statistics unit (2208) that may collect frequency statistics. The frequency statistics may be provided to an encoder (118) and may be used to determine quantization parameters that are to be applied to an image frame.

System and method for processing image data using an image signal processor

FIELD: physics, computer engineering.SUBSTANCE: invention relates to digital imaging devices and particularly to systems and a method of processing image data obtained using the image sensor of a digital imaging device. An image signal processing system includes a pixel final processing unit, a pixel preprocessing unit and a pixel processing conveyor. The final processing unit receives pixel data of image brightness/chrominance after processing by one of the preprocessing unit and processing conveyor. The final processing unit is configured to apply a facial detection operation, local tone mapping, brightness, contrast and colour control, as well as scaling. The final processing unit also includes a final statistics processing unit which collects frequency statistics. The frequency statistics are provided to an encoder and used to determine sampling parameters to be applied to an image frame.EFFECT: improved outward appearance of an image, achieved by increasing definition of the image without noise or artefacts.20 cl, 142 dwg, 5 tbl

Frederiksen Jeffrey E

Papers

System and method for processing image data using an image signal processor having back-end processing logic

System and method for processing image data using an image signal processor

System and method for processing image data using image signal processor having final processing logic