Argus::Ext::IBayerSharpnessMap Class Reference

Detailed Description

The Bayer sharpness map exposes image sharpness metrics that can be used in order to help determine the correct position of the lens to achieve the best focus.

Each metric is a normalized floating-point value representing the estimated sharpness for a particular color channel and pixel region, called bins, where 0.0 and 1.0 map to the minimum and maximum possible sharpness values, respectively. Sharpness values generally correlate with image focus in that a low sharpness implies a poorly focused (blurry) region while a high sharpness implies a well focused (sharp) region.

The size and layout of the bins used to calculate the sharpness metrics are determined by the libargus implementation, and are illustrated in the following diagram. The bin size and interval are constant across the image, and are positioned such that the generated metrics cover the majority of the full image. All dimensions are given in pixels.

          start.x                     interval.width
          _______                   _________________
         |       |                 |                 |
      _   ________________________________________________________
     |   |                                                        |

start.y | | | |_ | _____ _____ _____ | _ | | | | | | | | | | | 0,0 | | 1,0 | | 2,0 | | | | |_____| |_____| |_____| | | | | | interval.height

_____ _____ _____	_

| | | | | | | | | | 0,1 | | 1,1 | | 2,1 | | | |_____| |_____| |_____| |

| _____ _____ _____ | _ | | | | | | | | | | | 0,2 | | 1,2 | | 2,2 | | | size.height | |_____| |_____| |_____| | _|

________________________________________________________

                                        |_____|

                                       size.width

Definition at line 142 of file BayerSharpnessMap.h.

Inheritance diagram for Argus::Ext::IBayerSharpnessMap:

Collaboration diagram for Argus::Ext::IBayerSharpnessMap:

Public Member Functions
virtual Location	getBinStart () const =0
	Returns the starting location of the first bin, in pixels. More...
virtual Size	getBinSize () const =0
	Returns the size of each bin, in pixels. More...
virtual Size	getBinCount () const =0
	Returns the number of bins in both the horizontal (width) and vertical (height) directions. More...
virtual Size	getBinInterval () const =0
	Returns the bin intervals for both the x and y axis. More...
virtual float	getBinData (BayerChannel channel, const Location &binLocation, Status *status=NULL) const =0
	Returns the sharpness data for a single bin. More...

Static Public Member Functions
static const InterfaceID &	id ()

Protected Member Functions
	~IBayerSharpnessMap ()

Constructor & Destructor Documentation

Argus::Ext::IBayerSharpnessMap::~IBayerSharpnessMap ( )

inlineprotected

Definition at line 183 of file BayerSharpnessMap.h.

Member Function Documentation

virtual Size Argus::Ext::IBayerSharpnessMap::getBinCount ( ) const

pure virtual

Returns the number of bins in both the horizontal (width) and vertical (height) directions.

virtual float Argus::Ext::IBayerSharpnessMap::getBinData ( BayerChannel  channel, const Location &  binLocation, Status *  status = NULL  ) const

pure virtual

Returns the sharpness data for a single bin.

This value is normalized such that 0.0 and 1.0 map to the minimum and maximum possible sharpness values, respectively.

Parameters

channel	the Bayer channel of the metric to return.
binLocation	the location (or coordinate) of the bin containing the metric, starting from (0,0) for the top-left bin (eg. the bin located at getBinStart()).
status	optional status return code.

Returns

0 if binLocation is outside the range returned by getBinCount(). if status is non-NULL, STATUS_INVALID_PARAMS will be returned there.

virtual Size Argus::Ext::IBayerSharpnessMap::getBinInterval ( ) const

pure virtual

Returns the bin intervals for both the x and y axis.

These intervals are defined as the number of pixels between the first pixel of a bin and that of the immediate next bin.

virtual Size Argus::Ext::IBayerSharpnessMap::getBinSize ( ) const

pure virtual

Returns the size of each bin, in pixels.

virtual Location Argus::Ext::IBayerSharpnessMap::getBinStart ( ) const

pure virtual

Returns the starting location of the first bin, in pixels.

Relative to the top-left corner of the image.

static const InterfaceID& Argus::Ext::IBayerSharpnessMap::id ( )

inlinestatic

Definition at line 145 of file BayerSharpnessMap.h.

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The documentation for this class was generated from the following file:

• BayerSharpnessMap.h