Apple gets patent for a multi-point focusing system

PanARMENIAN.Net - Apple was awarded a patent for a multi-point focusing system that integrates with devices capable of multitouch input, possibly pointing to future use of the technology in a next-generation iPhone, iPad or iPod touch.

According to AppleInsider, the awarded U.S. patent for "multi-point touch focus" describes a system that lets the user of a camera-equipped device select two or more areas of focus on a touchscreen which, when a picture is taken, are passed through a dedicated image processor to produce optimal sharpness and exposure for both regions.

The patent background mentions that as the capabilities of automated image capturing progresses, so do the "possibilities for capturing images not as desired by the photographer." To solve this dilemma, Apple proposes a solution that combines multitouch input, live-preview imaging and advanced auto-focusing algorithms and tracking assets.

The patent calls for an image processor that continuously tracks the user-defined "regions of interest" in a combination of live image processing and auto-focus technology similar to that found in the iPhone 4S. Unlike the current handset, however, the focus will not be limited to center-weighting or face-detection and will in theory choose the best mix of camera settings to achieve the highest possible clarity in the multiple selected areas.

In order to facilitate the multi-point focus acquisition, the dedicated imaging processor calculates the two or more user-defined regions and adjusts the camera's focus drive to change the distance between the image sensor and the rear element of the lens. In addition, the regions' sizes can be changed on-the-fly by pinching the touchscreen, which will change how the imaging processor will weight the photo's overall focus.

Also noted was the ability to perform exposure adjustments using the "regions of interest" multi-point method. Currently, the third-party Camera+ app allows users to spot-meter a live image, but Apple's solution would take that functionality a step further by introducing multiple metering points.

Because the system requires a significant amount of computing power, the patent suggests that a dedicated chip be used to process the raw sensor data as well as control the camera's operation. Past iDevices have all used the main SoC to process image data and a dedicated chip would likely yield quicker operation and higher quality pictures.

It is unclear whether Apple will implement the newly patented technology in the next-gen iPhone rumored to debut sometime this fall, but the size of the imaging sensor, dedicated processing unit and new optics may be too large to fit into the expectedly thin chassis.