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Does cv::imencode have an identical behavior to cv::imwrite when converting cv::Mat to JPEG? I know that first one write to buffer and the second write to file but I am asking about the written content.
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imencode() returns two values, the first being whether the operation is successful and the second being the encoded image.
imwrite() Saves an image to a specified file. The function imwrite saves the image to the specified file. The image format is chosen based on the filename extension (see cv::imread for the list of extensions).
The function imread loads an image from the specified file and returns it. If the image cannot be read (because of missing file, improper permissions, unsupported or invalid format), the function returns an empty matrix ( Mat::data==NULL ).
Save Image to File in JPEG Format This is because cv2. imwrite() has the ability to compress the image while writing it into the file.
The syntax to define imwrite () function in OpenCV is as follows: returnvalue = imwrite (file_path, image) where file_path is the location of the file in which the image is to be written or saved, image is the image to be written or saved to the file and
The syntax of cv2.imwrite () is as follows – filename – Name of the file where the image needs to be saved. The extension of the filename determines the format of the image. For example, filname.jpeg will save the image in jpeg format and filename.png will save the image in png format.
It can save the image reallocations when the function is called repeatedly for images of the same size. Encodes an image into a memory buffer. The function imencode compresses the image and stores it in the memory buffer that is resized to fit the result. See cv::imwrite for the list of supported formats and flags description.
The imwrite () function returns the Boolean value False upon failing to write the or save the image to the local file system.
when you call cv::imwrite() it did not call cv::imencode() internally! both functions uses internal ImageEncoder. take a look at loadsave.cpp
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