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imgcodecs: Implementation of PAM encoder/decoder

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This patch implements the PAM image format as defined at:
http://netpbm.sourceforge.net/doc/pam.html

The PAM format provides a generic means for storing 2 dimensional information.
This is useful for opencv since there are cases where data gets translated into
non standardized formats, which makes it difficult to store and load this information.
This commit is contained in:
Dimitrios Katsaros
2016-07-14 15:27:36 +02:00
parent ce05d6cb89
commit 6172803012
6 changed files with 843 additions and 2 deletions
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modules/imgcodecs/include/opencv2/imgcodecs.hpp
+12 -1
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@@ -88,7 +88,8 @@ enum ImwriteFlags {
IMWRITE_PNG_STRATEGY = 17, //!< One of cv::ImwritePNGFlags, default is IMWRITE_PNG_STRATEGY_DEFAULT.
IMWRITE_PNG_BILEVEL = 18, //!< Binary level PNG, 0 or 1, default is 0.
IMWRITE_PXM_BINARY = 32, //!< For PPM, PGM, or PBM, it can be a binary format flag, 0 or 1. Default value is 1.
IMWRITE_WEBP_QUALITY = 64 //!< For WEBP, it can be a quality from 1 to 100 (the higher is the better). By default (without any parameter) and for quality above 100 the lossless compression is used.
IMWRITE_WEBP_QUALITY = 64, //!< For WEBP, it can be a quality from 1 to 100 (the higher is the better). By default (without any parameter) and for quality above 100 the lossless compression is used.
IMWRITE_PAM_TUPLETYPE = 128,//!< For PAM, sets the TUPLETYPE field to the corresponding string value that is defined for the format
};
//! Imwrite PNG specific flags used to tune the compression algorithm.
@@ -107,6 +108,16 @@ enum ImwritePNGFlags {
IMWRITE_PNG_STRATEGY_FIXED = 4 //!< Using this value prevents the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.
};
//! Imwrite PAM specific tupletype flags used to define the 'TUPETYPE' field of a PAM file.
enum ImwritePAMFlags {
IMWRITE_PAM_FORMAT_NULL = 0,
IMWRITE_PAM_FORMAT_BLACKANDWHITE = 1,
IMWRITE_PAM_FORMAT_GRAYSCALE = 2,
IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA = 3,
IMWRITE_PAM_FORMAT_RGB = 4,
IMWRITE_PAM_FORMAT_RGB_ALPHA = 5,
};
/** @brief Loads an image from a file.
@anchor imread
modules/imgcodecs/include/opencv2/imgcodecs/imgcodecs_c.h
+10 -1
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@@ -92,9 +92,18 @@ enum
CV_IMWRITE_PNG_STRATEGY_RLE =3,
CV_IMWRITE_PNG_STRATEGY_FIXED =4,
CV_IMWRITE_PXM_BINARY =32,
CV_IMWRITE_WEBP_QUALITY =64
CV_IMWRITE_WEBP_QUALITY =64,
CV_IMWRITE_PAM_TUPLETYPE = 128,
CV_IMWRITE_PAM_FORMAT_NULL = 0,
CV_IMWRITE_PAM_FORMAT_BLACKANDWHITE = 1,
CV_IMWRITE_PAM_FORMAT_GRAYSCALE = 2,
CV_IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA = 3,
CV_IMWRITE_PAM_FORMAT_RGB = 4,
CV_IMWRITE_PAM_FORMAT_RGB_ALPHA = 5,
};
/* save image to file */
CVAPI(int) cvSaveImage( const char* filename, const CvArr* image,
const int* params CV_DEFAULT(0) );