![]() ![]() This option can be found below Input file(s), and you’ll be needing it if you’re planning to batch convert dozens of images at the same time. You see, from here, folks can change the size of the thumbnails. The options to choose from are Small Thumbnails, Thumbnails, Big Thumbnails, and List. By default, the app will have it set at Thumbnails, and that should be fine for most people, at least. Now, this is where XnCovert begins to show off what it can really do, and we love it.įrom here, the user to make several changes to all images added. For example, the user can set them to be cropped or resized. Additionally, watermarks can be added, along with text, vignettes, and much more.Īfter adding the preferred actions, check the before and after section to see what the images would look like before hitting the Convert button. 4] Outputīefore hitting the convert button, the user must first select the Output tab to make a few changes. This is where folks will choose which folder converted images will end up in, and the favored file format, among other things.Īs you can tell from the picture about, the option is there to have the pictures pop up in the source folder or a different destination. Now, when it comes down to the Format section, simply click on the menu below, and from there, choose one from the many formats available. If you want to do more, click Settings below to change the quality of the images, the subsampling factor, and more.įinally, click on the Convert button below and wait for everything to take shape. Depending on the speed of your computer and the number of pictures added to XnConvert, the conversion process could take a while. If (image.Width > maxSize.Width & image.Width >= image.Luckily, there’s an option to select how many CPU Cores the tool should use if you want faster performance.ĭownload XnConvert for free from the official website. Private Size GetImageMaxSize(Image image, Size maxSize) ![]() Var compressionParam = new EncoderParameter(ImageCodec.Compression, (long)compressionScheme) Var qualityParam = new EncoderParameter(ImageCodec.Quality, compressionLevel) Var imageCodec = ImageCodecInfo.GetImageEncoders().FirstOrDefault(enc => enc.FormatID = ) Var codecParms = new EncoderParameters(2) Var bwImage = image.Clone(new Rectangle(Point.Empty, image.Size), PixelFormat.Format1bppIndexed) ĬompressionLevel = Math.Max(0, Math.Min(100, compressionLevel)) Var imageSize = GetImageMaxSize(image, maxWidthHeight) Private MemoryStream ConvertToBWTiffImageStream(Bitmap image, Size maxWidthHeight, long compressionLevel, EncoderValue compressionScheme) (the GetImageMaxSize() method is half-dumb, I'll fix it later) using System.Drawing ► Remember to add this: using ImageCodec = The Image Size is scaled proportionally according to these values. Note that maximumWidthAndHeight specify the maximum Width and the maximum Height, not a new Size of the Image (which would be otherwise distorted). Var imageStream = ConvertToBWTiffImageStream(sourceImage, maximumWidthAndHeight, quality, compression) Var compression = EncoderValue.CompressionCCITT4 The ConvertToBWTiffImageStream() method can be called as: var maximumWidthAndHeight = new Size(1024, 768) File.WriteAllBytes(".tiff", imageStream.ToArray()) The size in bytes of the sample Image provided in the question, when saved to a file, is reduced from the initial 94,600 bytes to 6,786 bytes with maximum quality. Encode the Image, using the TIFF format Encoder, saving it to a MemoryStream for further processing.Compress the Image using the CCTII Group 4 Compression scheme.The process can be repeated if the final Image bytes count doesn't fit the requirements ( 50KB) Define the quality of the Image: since the Image will be converted to B&W, its quality can be set initially to the maximum ( 100).The internal conversion method is quite good, the resulting Image quality is usually a good compromise. Convert the Image to a 1bpp Indexed format: the Bitmap.Clone() method provides means to both define the source Image new Size and set a specific PixelFormat ( PixelFormat.Format1bppIndexed, in this case).Redefine proportionally the Size of the source Image, setting the maximum Width and Height limits that the converted image needs to respect.Since the source Image seems to be a Color Image (that just happens to look like Black&White) and its dimensions need to be adjusted to a maximum value, you need to:
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