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Merge branch 4.x

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This commit is contained in:
Alexander Smorkalov
2025-02-19 09:31:51 +03:00
parent 4d15b2a33f 6092499907
commit 1483504702
130 changed files with 6998 additions and 3110 deletions
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modules/imgcodecs/include/opencv2/imgcodecs.hpp
+13 -7
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@@ -65,6 +65,7 @@ namespace cv
//! @{
//! Imread flags
//! @note IMREAD_COLOR_BGR (IMREAD_COLOR) and IMREAD_COLOR_RGB can not be set at the same time.
enum ImreadModes {
IMREAD_UNCHANGED = -1, //!< If set, return the loaded image as is (with alpha channel, otherwise it gets cropped). Ignore EXIF orientation.
IMREAD_GRAYSCALE = 0, //!< If set, always convert image to the single channel grayscale image (codec internal conversion).
@@ -263,11 +264,11 @@ struct CV_EXPORTS_W_SIMPLE Animation
- If a negative value or a value beyond the maximum of `0xffff` (65535) is provided, it is reset to `0`
(infinite looping) to maintain valid bounds.
@param bgColor A `Scalar` object representing the background color in BGRA format:
@param bgColor A `Scalar` object representing the background color in BGR format:
- Defaults to `Scalar()`, indicating an empty color (usually transparent if supported).
- This background color provides a solid fill behind frames that have transparency, ensuring a consistent display appearance.
*/
Animation(int loopCount = 0, Scalar bgColor = Scalar());
CV_WRAP Animation(int loopCount = 0, Scalar bgColor = Scalar());
};
/** @brief Loads an image from a file.
@@ -413,13 +414,13 @@ can be saved using this function, with these exceptions:
- With JPEG 2000 encoder, 8-bit unsigned (CV_8U) and 16-bit unsigned (CV_16U) images can be saved.
- With JPEG XL encoder, 8-bit unsigned (CV_8U), 16-bit unsigned (CV_16U) and 32-bit float(CV_32F) images can be saved.
- JPEG XL images with an alpha channel can be saved using this function.
To do this, create 8-bit (or 16-bit, 32-bit float) 4-channel image BGRA, where the alpha channel goes last.
Fully transparent pixels should have alpha set to 0, fully opaque pixels should have alpha set to 255/65535/1.0.
To achieve this, create an 8-bit 4-channel (CV_8UC4) / 16-bit 4-channel (CV_16UC4) / 32-bit float 4-channel (CV_32FC4) BGRA image, ensuring the alpha channel is the last component.
Fully transparent pixels should have an alpha value of 0, while fully opaque pixels should have an alpha value of 255/65535/1.0.
- With PAM encoder, 8-bit unsigned (CV_8U) and 16-bit unsigned (CV_16U) images can be saved.
- With PNG encoder, 8-bit unsigned (CV_8U) and 16-bit unsigned (CV_16U) images can be saved.
- PNG images with an alpha channel can be saved using this function. To do this, create
8-bit (or 16-bit) 4-channel image BGRA, where the alpha channel goes last. Fully transparent pixels
should have alpha set to 0, fully opaque pixels should have alpha set to 255/65535 (see the code sample below).
- PNG images with an alpha channel can be saved using this function.
To achieve this, create an 8-bit 4-channel (CV_8UC4) / 16-bit 4-channel (CV_16UC4) BGRA image, ensuring the alpha channel is the last component.
Fully transparent pixels should have an alpha value of 0, while fully opaque pixels should have an alpha value of 255/65535(see the code sample below).
- With PGM/PPM encoder, 8-bit unsigned (CV_8U) and 16-bit unsigned (CV_16U) images can be saved.
- With TIFF encoder, 8-bit unsigned (CV_8U), 8-bit signed (CV_8S),
16-bit unsigned (CV_16U), 16-bit signed (CV_16S),
@@ -429,6 +430,11 @@ can be saved using this function, with these exceptions:
- Multiple images (vector of Mat) can be saved in TIFF format (see the code sample below).
- 32-bit float 3-channel (CV_32FC3) TIFF images will be saved
using the LogLuv high dynamic range encoding (4 bytes per pixel)
- With GIF encoder, 8-bit unsigned (CV_8U) images can be saved.
- GIF images with an alpha channel can be saved using this function.
To achieve this, create an 8-bit 4-channel (CV_8UC4) BGRA image, ensuring the alpha channel is the last component.
Fully transparent pixels should have an alpha value of 0, while fully opaque pixels should have an alpha value of 255.
- 8-bit single-channel images (CV_8UC1) are not supported due to GIF's limitation to indexed color formats.
If the image format is not supported, the image will be converted to 8-bit unsigned (CV_8U) and saved that way.