Selects a JPEG compression of images. With a high quality level, almost all pixels are preserved. With a low quality level, some pixels get lost and artefacts are introduced, but file sizes are reduced.
选择图像的 JPEG 压缩。使用高质量级别时，几乎可以保留所有像素。使用低质量级别时，将会丢失一些像素并导致失真，但可以使文件缩小。