Patent ID: 8605167

Claim:
An image signal processing circuitry comprising: a front-end pixel processing unit configured to receive a frame of multi-color raw image data comprising pixels representing an image scene acquired using a digital image sensor, wherein the front-end pixel processing unit comprises statistics collection logic configured to collect statistics based upon the raw frame pixel data, wherein the collected statistics comprises at least one of auto-white balance statistics and auto-exposure statistics, and wherein the statistics collection logic comprises: an input configured to receive the raw frame pixel data; color space conversion logic configured to convert the raw frame pixel data into multiple sets of converted pixel data, each of the converted pixel data sets being in a different color space; and a set of pixel filters, each being configured to receive the raw frame pixel data and the multiple sets of converted pixel data, to select one set of either the raw frame pixel data or the converted pixel data, and to analyze the selected set of pixel data and determine one or more accumulated color sum values; wherein the image signal processing circuitry comprises control logic configured to determine a set of white point balance gains to apply to the multi-color raw frame pixels based at least partially upon the accumulated color sum values.