enum cv::ImwriteFlags

Overview

Imwrite flags. More…

#include <imgcodecs.hpp>

enum ImwriteFlags
{
    IMWRITE_JPEG_QUALITY        = 1,
    IMWRITE_JPEG_PROGRESSIVE    = 2,
    IMWRITE_JPEG_OPTIMIZE       = 3,
    IMWRITE_JPEG_RST_INTERVAL   = 4,
    IMWRITE_JPEG_LUMA_QUALITY   = 5,
    IMWRITE_JPEG_CHROMA_QUALITY = 6,
    IMWRITE_PNG_COMPRESSION     = 16,
    IMWRITE_PNG_STRATEGY        = 17,
    IMWRITE_PNG_BILEVEL         = 18,
    IMWRITE_PXM_BINARY          = 32,
    IMWRITE_WEBP_QUALITY        = 64,
    IMWRITE_PAM_TUPLETYPE       = 128,
};

Detailed Documentation

Imwrite flags.

Enum Values

IMWRITE_JPEG_QUALITY

For JPEG, it can be a quality from 0 to 100 (the higher is the better). Default value is 95.

IMWRITE_JPEG_PROGRESSIVE

Enable JPEG features, 0 or 1, default is False.

IMWRITE_JPEG_OPTIMIZE

Enable JPEG features, 0 or 1, default is False.

IMWRITE_JPEG_RST_INTERVAL

JPEG restart interval, 0 - 65535, default is 0 - no restart.

IMWRITE_JPEG_LUMA_QUALITY

Separate luma quality level, 0 - 100, default is 0 - don’t use.

IMWRITE_JPEG_CHROMA_QUALITY

Separate chroma quality level, 0 - 100, default is 0 - don’t use.

IMWRITE_PNG_COMPRESSION

For PNG, it can be the compression level from 0 to 9. A higher value means a smaller size and longer compression time. If specified, strategy is changed to IMWRITE_PNG_STRATEGY_DEFAULT (Z_DEFAULT_STRATEGY). Default value is 1 (best speed setting).

IMWRITE_PNG_STRATEGY

One of cv::ImwritePNGFlags, default is IMWRITE_PNG_STRATEGY_RLE.

IMWRITE_PNG_BILEVEL

Binary level PNG, 0 or 1, default is 0.

IMWRITE_PXM_BINARY

For PPM, PGM, or PBM, it can be a binary format flag, 0 or 1. Default value is 1.

IMWRITE_WEBP_QUALITY

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

For PAM, sets the TUPLETYPE field to the corresponding string value that is defined for the format.