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  • Good library to load images of different formats

    - by codymanix
    Hi Iam developing an image viewer application just like irfan-view or acdsee which should be capable to view lots of different image file formats (not just the standard ones which can be done with System.Drawing.Image). Iam currently using ImageMagick but it isn't very fast and seems to be unstable with some image files. Can anyone suggest a good imaging library, ideally with a .NET wrapper already present?

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  • make a 3D spotlight cone matrix

    - by Soubok
    How to create the transformation matrix (4x4) that transforms a cylinder (of height 1 and diameter 1) into a cone that represents my spotlight (position, direction and cutoff angle) ? --edit-- In other words: how to draw the cone that represents my spotlight by drawing a cylinder through a suitable transformation matrix.

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  • Embed XAML in XML Schema

    - by Michael Stoll
    I'm developping a xml data format. Besides other data there should be a xaml drawing. So I wanted to have a xml element, which can contain any valid xaml. How can this be expressed in the XML Schema? I tried to import the xaml schema, but I couldn't find a xsd file for it. The makeshift would be to use an encoded string.

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  • ColorMatrix equivalent in XNA

    - by Charles
    In XNA, how can I achieve the same effect of applying a System.Drawing.Imaging.ColorMatrix? The following article shows how I would like to render my sprites, but it uses GDI+: http://www.c-sharpcorner.com/UploadFile/mahesh/Transformations0512192005050129AM/Transformations05.aspx How can this be done in XNA? Is there a general purpose shade I can use? Any help would be aprreciated.

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  • iphone touch offset in uiwebview

    - by How2iphone
    I am currently experimenting with canvas drawing function in a uiwebview.Its a simple app that allows you to finger paint on the Iphone.Can someone point me in the rite direction on a problem I'm having.I need to be able to offset the touch so you can see what your painting instead of your finger being in the way.Its built on Html,javascript and css.Any ideas would be greatly appreciated.

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  • Garbage Collector not doing its job. Memory Consumption = 1.5GB & OutOFMemory Exception.

    - by imageWorker
    I'm working with images (each of size = 5MB). The following code extract some information from each image that is present in the given directory. I'm getting out of memory exception. The size of the process is around (1.5GB). I don't know why garbage collector is not freeing memory. I even tried adding GC.Collect() as last line of foreach loop. Still I'm getting 'OutOFMemory' using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.IO; using System.Drawing; using System.Drawing.Imaging; namespace TrainSVM { class Program { static void Main(string[] args) { FileStream fs = new FileStream("dg.train",FileMode.OpenOrCreate,FileAccess.Write); StreamWriter sw = new StreamWriter(fs); String[] filePathArr = Directory.GetFiles("E:\\images\\"); foreach (string filePath in filePathArr) { if (filePath.Contains("lmn")) { sw.Write("1 "); Console.Write("1 "); } else { sw.Write("1 "); Console.Write("1 "); } Bitmap originalBMP = new Bitmap(filePath); /***********************/ Bitmap imageBody; ImageBody.ImageBody im = new ImageBody.ImageBody(originalBMP); imageBody = im.GetImageBody(-1); /* white coat */ Bitmap whiteCoatBitmap = Rgb2Hsi.Rgb2Hsi.GetHuePlane(imageBody); float WhiteCoatPixelPercentage = Rgb2Hsi.Rgb2Hsi.GetWhiteCoatPixelPercentage(whiteCoatBitmap); //Console.Write("whiteDone\t"); sw.Write("1:" + WhiteCoatPixelPercentage + " "); Console.Write("1:" + WhiteCoatPixelPercentage + " "); /******************/ Quaternion.Quaternion qtr = new Quaternion.Quaternion(-15); Bitmap yellowCoatBMP = qtr.processImage(imageBody); //yellowCoatBMP.Save("yellowCoat.bmp"); float yellowCoatPixelPercentage = qtr.GetYellowCoatPixelPercentage(yellowCoatBMP); //Console.Write("yellowCoatDone\t"); sw.Write("2:" + yellowCoatPixelPercentage + " "); Console.Write("2:" + yellowCoatPixelPercentage + " "); /**********************/ Bitmap balckPatchBitmap = BlackPatchDetection.BlackPatchDetector.MarkBlackPatches(imageBody); float BlackPatchPixelPercentage = BlackPatchDetection.BlackPatchDetector.BlackPatchPercentage; //Console.Write("balckPatchDone\n"); sw.Write("3:" + BlackPatchPixelPercentage + "\n"); Console.Write("3:" + BlackPatchPixelPercentage + "\n"); balckPatchBitmap.Dispose(); yellowCoatBMP.Dispose(); whiteCoatBitmap.Dispose(); originalBMP.Dispose(); sw.Flush(); } sw.Dispose(); fs.Dispose(); } } }

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  • Android Mapview panning and zooming too slow........

    - by Pratap S
    I've developed a GPS app in which i record the user roots and show it on the map.......but Panning around on the map when reviewing my route is painfully slow, it takes at least 4 or 5 seconds for the map to respond the finger swipes...... I've overridden the onDraw() method and drawing the lines to show the routes......is there any better way to do this so that panning becomes faster as in "MyTracks"........... Thank you all..... Pratap S.

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  • Smart image search via Powershell

    - by Oleg Svechkarenko
    I interested in file searching by custom properties. For example, I want to find all JPEG-images with certain dimensions. Something looks like Get-ChildItem -Path C:\ -Filter *.jpg -Recursive | where-object { $_.Dimension -eq '1024x768' } I suspect it's about using of System.Drawing. How it can be done? Thanks in advance

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  • Online Collaborative Schema Design (leverage google docs?)

    - by AK
    I'm looking for an online, collaborative schema designer. It's important that it can handle revisions (history of changes). This looks cool, and I could host it on a server - but doesn't look like it would handle multi-user: http://ondras.zarovi.cz/sql/demo/ Currently we're doing a lot of design collaboration on google docs/spreadsheets. Has anyone had any success using google spreadsheet for schema design? Even if there were just a gadget for drawing lines/connections, I might give Google Docs a shot.

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  • Y-axis in MATLAB bar plot is hidden.

    - by Claus
    I am drawing a simple bar diagram in MATLAB. The problem is, that the value at x = 0 lets the y-axis disappear partially. Is there a way to bring the y-axis to the front instead of hiding between the y-value for x=0? Is there any option I can make sure the y-axis is always in the front?

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  • How to draw a drop shadow AND gradient with quartz2d?

    - by Luke
    Hello! I've a custom shape drawing using coregraphics and i want to add a drop shadow and a gradient to it also. I've been trying and searching a lot of informations on how to combine and do this, but i can't get it to work. I'm able to draw only one either. Anyone doing this already or know how to do this? Thank you.

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  • Sequence Diagram return a new constructed Object

    - by user256007
    I am drawing a Sequence Diagram where the scenario is. 1. an Actor calls :Table::query(query:String) :Table::query Calls :Connection::execute(query) :Connection::execute < a new :Row Object :Connection::execute calls :Row::fillData(result) :Connection::execute returns :Row ...... There are More But I am Stuck in Step 5 I cant Understand how to draw that, :Connection::execute returning the newly Constructed Row itself, in a Standard way.

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  • Is there a way to change the color of plots in jQuery flot without redrawing the whole chart?

    - by Sam Lee
    I have a chart that I'm drawing using flot. I want to change the colors of the data plots when someone hovers over text. Currently, I am doing this by redrawing the entire chart each time I need to highlight something. This is pretty slow (about 30 milliseconds for a simple chart, as much as 100 for a more complicated chart). Since all I want to do is change the color, is there a faster solution?

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  • How can I generate images of basic figures with Perl?

    - by jonny
    I am using jalava library as a diagram drawing tool. It displays figures as images in order to maintain compatibility with majority of browsers. When diagram block is being resized a request is being made and new gif image is generated and send to browser. What I need is generating image of basic blocks, like rounded rectangle, circle, diamond with specified parameters (height, width and color). I want to do all server-side; my server part is written on Perl.

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  • Android - Transforming widgets within transformed widgets and the resulting usability issues.

    - by Ben Rose
    Hello. I'm new to Android application development and I'm currently experimenting with various UI ideas. In the image below, you can see a vertically scrolling list of horizontally scrolling galleries (and also textviews as you can see). I'm also doing some matrix and camera transformations which I will come to in a minute. For the background of the list elements, I use green. Blue is the background of the galleries, and red is the background for the images. These are just for my benefit of learning. The galleries being used are extended classes where I overrode the drawChild method to perform a canvas scale operation in order for the image closest to the center (width) to be larger than the others. The list view going vertically, I overrode the drawChild method and used the camera rotations from lack of depth dimension in the canvas functionality. The items in the list are scaled down and rotated relative to their position's proximity to the center (height). I understood that scrolling and clicking would not necessarily follow along with the image transforms, but it appears as though the parent Gallery class's drawing is constrained to the original coordinates as well (see photo below). I would love to hear any insight any of you have regarding how I can change the coordinates of the galleries in what is rendered via gallery scroll and the touch responsiveness of said gallery. Images in the gallery are not same dimensions, so don't let that throw you in looking at the image below Thanks in advance! Ben link to image (could not embed) -- Update: I was using my test application UI and noticed that when I got the UI to the point of the linked image and then I touched the top portion of the next row in the list, the gallery updated to display the proper representation. So, I added a call to clearFocus() in the drawChild method and that resulted in more accurate drawing. It does seem a tad slower, and since I'm on the Incredible, I'm worried it is a bloated solution. In any event, I would still appreciate any thoughts you have regarding the best way to have the views display properly and how to translate the touch events in the gallery's new displayed area to its touchable coordinates so that scrolling on the actual images works when the gallery has moved. Thanks!

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  • Core Data deleteObject: sets attributes to nil

    - by SG1
    I am implementing an undo/redo mechanism in my app. This works fine for lots of cases. However, I can't undo past deleteObject:. the object is correctly saved in the undo queue, and I get it back and reinsterted into the Core Data stack just fine when calling undo. The problem is that all it's attributes are getting set to nil when I delete it. I have an entity "Canvas" with a to-many relationship called "graphics" to a "Graphic" entity, which has its inverse set to "canvas". Deleting a Graphic, then inserting it back, doesn't work. Here's the code (the redo method is basically the same): - (void)deleteGraphic:(id)aGraphic { //NSLog(@"undo drawing"); //Prepare the undo/redo [self.undoManager beginUndoGrouping]; [self.undoManager setActionName:@"Delete Graphic"]; [[self.detailItem valueForKey:@"graphics"] removeObject:aGraphic]; [[self managedObjectContext] deleteObject:aGraphic]; //End undo/redo [self.undoManager registerUndoWithTarget:self selector:@selector(insertGraphic:) object:aGraphic]; [self.undoManager endUndoGrouping]; NSLog(@"graphics are %@", [self sortedGraphics]); //Update drawing [self.quartzView setNeedsDisplay]; } and here's the wierdness: Before delete: graphics are ( <NSManagedObject: 0x1cc3f0> (entity: Graphic; id: 0x1c05f0 <x-coredata:///Graphic/t840FE8AD-F2E7-4214-822F-7994FF93D4754> ; data: { canvas = 0x162b70 <x-coredata://A919979E-75AD-474D-9561-E0E8F3388718/Canvas/p20>; content = <62706c69 73743030 d4010203 04050609 0a582476 65727369 6f6e5424 746f7059 24617263 68697665 7258246f 626a6563 7473>; frameRect = nil; label = nil; order = 1; path = "(...not nil..)"; traits = "(...not nil..)"; type = Path; }) After redo: graphics are ( <NSManagedObject: 0x1cc3f0> (entity: Graphic; id: 0x1c05f0 <x-coredata:///Graphic/t840FE8AD-F2E7-4214-822F-7994FF93D4754> ; data: { canvas = nil; content = nil; frameRect = nil; label = nil; order = 0; path = nil; traits = nil; type = nil; }), You can see it's the same object, just totally bleached by Core Data. The relationship delete rouls apparently have nothing to do with it as I've set them to "No Action" in a test.

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  • Changing a custom accessoryView in a uitableviewcell?

    - by cannyboy
    I'm trying to change the custom accessoryView of a uitableviewcell immediately after the user clicks on the cell. How would I do this? For the record, I'm using Matt Gallagher' custom table view tutorial: http://cocoawithlove.com/2009/04/easy-custom-uitableview-drawing.html Download link for source: http://projectswithlove.com/projects/EasyCustomTable.zip

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  • Understanding Device Contexts

    - by Smashery
    As a relative newcomer to MFC, I see Device Contexts (DCs) a lot. I vaguely understand that it's something to do with drawing, but the specifics are not very well explained anywhere that I can find. What does creating a "compatible Device Context" mean, and why is it important? What does SelectObject do, and how must I make a DC compatible first?

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  • Scaling mouse coordinates for GlScale?

    - by user146780
    Right now I have a GL context that is set up with a top left coordinate system. I made my mouse so that its 0,0 is the top left of the Open GL frame. If I apply GlScalef(2,2,2) for example to my scene, how would I have to change my mouse so that drawing stil maps out correctly. Thanks

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