using (MagickImage img = new MagickImage("alphatemp1.png")) { using (MagickImage mask = new MagickImage("alphatemp2.png")) { img.Composite(mask, 0, 0, CompositeOperator.CopyAlpha); img.Write("final_im7.png"); } }
using (MagickImage img = new MagickImage(responseStream)) { double opacitySetting = Quantum.Max / (Quantum.Max * 0.5); img.Alpha(AlphaOption.Set); img.Evaluate(Channels.Alpha, EvaluateOperator.Min, Quantum.Max / opacitySetting); using (MagickImage tiles = new MagickImage("C:\\bar.png") { tiles.Composite(img, Gravity.Center, CompositeOperator.Atop); tiles.Write("C:\\foo.png"); } }
You can find some more information about collecting a crash dump here: http://msdn.microsoft.com/en-us/library/d5zhxt22.aspxThanks for the crash dump link, however i can't make such file as it is required VS to be installed on the servers where I run the application..
Using bm As Bitmap = Img.Tobitmap
bm.save("file....")
End UsingI don't think it should contain an alpha channel. But I have no good answer to your other question. It's the same question as if you where asking me if most images contain an alpha channel. I don't know the answer. There are CMYK images that have an alpha channel (CMYKA) and CMYK images that don't have an alpha channel.
- that it should? do most CMYK images contain an alpha channel? I'm more of a developer and not an true image guy so there are pieces that I miss.
Then we would have to figure out how we can extract the alpha channel with Ghostscript from a CMYK image. Our current code does not support CMYKA images, it just threats them as CMYK.
- if it did contain an alpha channel, would this not be an issue?
Can you not reproduce the issue on your local machine? Getting a crash dump will help to really fix the problem. It would also help if you can provide me with a really small sample application that I can use to reproduce the problem.Please check your email when you have time, I sent you more info about the issue and crash files as well
MagickReadSettings settings = new MagickReadSettings(); // Settings the density to 300 dpi will create an image with a better quality settings.Density = new PointD(300, 300); using (MagickImageCollection images = new MagickImageCollection()) { // Add all the pages of the pdf file to the collection images.Read("Snakeware.pdf", settings); int page = 1; foreach (MagickImage image in images) { // Write page to file that contains the page number image.Write("Snakeware.Page" + page + ".png"); // Writing to a specific format works the same as for a single image image.Format = MagickFormat.Ptif; image.Write("Snakeware.Page" + page + ".tif"); page++; } }
Dim settings AsNew MagickReadSettings() ' Settings the density to 300 dpi will create an image with a better quality settings.Density = New PointD(300, 300) Using images AsNew MagickImageCollection() ' Add all the pages of the pdf file to the collection images.Read("Snakeware.pdf", settings) Dim page AsInteger = 1 ForEach image As MagickImage In images ' Write page to file that contains the page number image.Write("Snakeware.Page"& page & ".png") ' Writing to a specific format works the same as for a single image image.Format = MagickFormat.Ptif image.Write("Snakeware.Page"& page & ".tif") page += 1 NextEndUsing
MagickReadSettings settings = new MagickReadSettings(); // Settings the density to 300 dpi will create an image with a better quality settings.Density = new PointD(300, 300); using (MagickImageCollection images = new MagickImageCollection()) { // Add all the pages of the pdf file to the collection images.Read("Snakeware.pdf", settings); // Create new image that appends all the pages horizontallyusing (MagickImage horizontal = images.AppendHorizontally()) { // Save result as a png horizontal.Write("Snakeware.horizontal.png"); } // Create new image that appends all the pages horizontallyusing (MagickImage vertical = images.AppendVertically()) { // Save result as a png vertical.Write("Snakeware.vertical.png"); } }
Dim settings AsNew MagickReadSettings() ' Settings the density to 300 dpi will create an image with a better quality settings.Density = New PointD(300, 300) Using images AsNew MagickImageCollection() ' Add all the pages of the pdf file to the collection images.Read("Snakeware.pdf", settings) ' Create new image that appends all the pages horizontallyUsing horizontal As MagickImage = images.AppendHorizontally() ' Save result as a png horizontal.Write("Snakeware.horizontal.png") EndUsing' Create new image that appends all the pages horizontallyUsing vertical As MagickImage = images.AppendVertically() ' Save result as a png vertical.Write("Snakeware.vertical.png") EndUsingEndUsing
using (MagickImageCollection collection = new MagickImageCollection()) { // Add first page collection.Add(new MagickImage("SnakewarePage1.jpg")); // Add second page collection.Add(new MagickImage("SnakewarePage2.jpg")); // Create pdf file with two pages collection.Write("Snakeware.pdf"); }
Using collection AsNew MagickImageCollection() ' Add first page collection.Add(New MagickImage("SnakewarePage1.jpg")) ' Add second page collection.Add(New MagickImage("SnakewarePage2.jpg")) ' Create pdf file with two pages collection.Write("Snakeware.pdf") EndUsing
// Read image from fileusing (MagickImage image = new MagickImage("Snakeware.jpg")) { // Create pdf file with a single page image.Write("Snakeware.pdf"); }
' Read image from fileUsing image AsNew MagickImage("SnakewarePage.jpg") ' Create pdf file with a single page image.Write("Snakeware.pdf") EndUsing
using (MagickImageCollection collection = new MagickImageCollection()) { MagickReadSettings settings = new MagickReadSettings(); settings.FrameIndex = 0; // First page settings.FrameCount = 1; // Number of pages// Read only the first page of the pdf file collection.Read("Snakeware.pdf", settings); // Clear the collection collection.Clear(); settings.FrameCount = 2; // Number of pages// Read the first two pages of the pdf file collection.Read("Snakeware.pdf", settings); }
Using collection AsNew MagickImageCollection() Dim settings AsNew MagickReadSettings() settings.FrameIndex = 0 ' First page settings.FrameCount = 1 ' Number of pages' Read only the first page of the pdf file collection.Read("Snakeware.pdf", settings) ' Clear the collection collection.Clear() settings.FrameCount = 2 ' Number of pages' Read the first two pages of the pdf file collection.Read("Snakeware.pdf", settings) EndUsing
// Read from file.using (MagickImage image = new MagickImage("Snakeware.jpg")) { } // Read from stream.using (MemoryStream memStream = LoadMemoryStreamImage()) { using (MagickImage image = new MagickImage(memStream)) { } } // Read from byte array.byte[] data = LoadImageBytes(); using (MagickImage image = new MagickImage(data)) { } // Read image that has no predefined dimensions. MagickReadSettings settings = new MagickReadSettings(); settings.Width = 800; settings.Height = 600; using (MagickImage image = new MagickImage("xc:yellow", settings)) { } using (MagickImage image = new MagickImage()) { image.Read("Snakeware.jpg"); image.Read(memStream); image.Read("xc:yellow", settings); using (MemoryStream memStream = LoadMemoryStreamImage()) { image.Read(memStream); } }
' Read from file.Using image AsNew MagickImage("Snakeware.jpg") EndUsing' Read from stream.Using memStream As MemoryStream = LoadMemoryStreamImage() Using image AsNew MagickImage(memStream) EndUsingEndUsing' Read from byte array.Dim data AsByte() = LoadImageBytes() Using image AsNew MagickImage(data) EndUsing' Read image that has no predefined dimensions.Dim settings AsNew MagickReadSettings() settings.Width = 800 settings.Height = 600 Using image AsNew MagickImage("xc:yellow", settings) EndUsingUsing image AsNew MagickImage() image.Read("Snakeware.jpg") image.Read(memStream) image.Read("xc:yellow", settings) Using memStream As MemoryStream = LoadMemoryStreamImage() image.Read(memStream) EndUsingEndUsing
// Read from file MagickImageInfo info = new MagickImageInfo("Snakeware.jpg"); // Read from streamusing (MemoryStream memStream = LoadMemoryStreamImage()) { info = new MagickImageInfo(memStream); } // Read from byte arraybyte[] data = LoadImageBytes(); info = new MagickImageInfo(data); info = new MagickImageInfo(); info.Read("Snakeware.jpg"); using (MemoryStream memStream = LoadMemoryStreamImage()) { info.Read(memStream); } info.Read(data); Console.WriteLine(info.Width); Console.WriteLine(info.Height); Console.WriteLine(info.ColorSpace); Console.WriteLine(info.Format); Console.WriteLine(info.ResolutionX); Console.WriteLine(info.ResolutionY);
' Read from fileDim info AsNew MagickImageInfo("Snakeware.jpg") ' Read from streamUsing memStream As MemoryStream = LoadMemoryStreamImage() info = New MagickImageInfo(memStream) EndUsing' Read from byte arrayDim data AsByte() = LoadImageBytes() info = New MagickImageInfo(data) info = New MagickImageInfo() info.Read("Snakeware.jpg") Using memStream As MemoryStream = LoadMemoryStreamImage() info.Read(memStream) EndUsing info.Read(data) Console.WriteLine(info.Width) Console.WriteLine(info.Height) Console.WriteLine(info.ColorSpace) Console.WriteLine(info.Format) Console.WriteLine(info.ResolutionX) Console.WriteLine(info.ResolutionY)
// Read from fileusing (MagickImageCollection collection = new MagickImageCollection("Snakeware.gif")) { } // Read from streamusing (MemoryStream memStream = LoadMemoryStreamImage()) { using (MagickImageCollection collection = new MagickImageCollection(memStream)) { } } // Read from byte arraybyte[] data = LoadImageBytes(); using (MagickImageCollection collection = new MagickImageCollection(data)) { } // Read pdf with custom density. MagickReadSettings settings = new MagickReadSettings(); settings.Density = new PointD(144, 144); using (MagickImageCollection collection = new MagickImageCollection("Snakeware.pdf", settings)) { } using (MagickImageCollection collection = new MagickImageCollection()) { collection.Read("Snakeware.jpg"); using (MemoryStream memStream = LoadMemoryStreamImage()) { collection.Read(memStream); } collection.Read(data); collection.Read("Snakeware.pdf", settings); }
' Read from fileUsing collection AsNew MagickImageCollection("Snakeware.gif") EndUsing' Read from streamUsing memStream As MemoryStream = LoadMemoryStreamImage() Using collection AsNew MagickImageCollection(memStream) EndUsingEndUsing' Read from byte arrayDim data AsByte() = LoadImageBytes() Using collection AsNew MagickImageCollection(data) EndUsing' Read pdf with custom density.Dim settings AsNew MagickReadSettings() settings.Density = New PointD(144, 144) Using collection AsNew MagickImageCollection("Snakeware.pdf", settings) EndUsingUsing collection AsNew MagickImageCollection() collection.Read("Snakeware.jpg") Using memStream As MemoryStream = LoadMemoryStreamImage() collection.Read(memStream) EndUsing collection.Read(data) collection.Read("Snakeware.pdf", settings) EndUsing