Drawing a Binary Raster

I have to paint lots of little binary bitmaps to the screen.
Is the only way to do this with binary type images?
Is there a way to do this faster with rasters or anything?

I'm not sure if it's faster, but another way is using a BufferedImage with an ImageFilter. Basically you override the filterRGB() method and return the int rgb value for the pixel at x, y. It works with ImageConsumers for the drawing. These might help, and there are probably others:
http://www.exampledepot.com/egs/java.awt.image/FilterRgb.html
http://www.java2s.com/Code/JavaAPI/java.awt.image/extendsImageFilter.htm

Similar Messages

Drawing a binary tree

Hi guys ;
I'm trying to write a Java GUI that draws a binary tree on a JPanel.
the tree is dynamically filled while user is inserting nodes.
I need a quit robust Implementation so that the tree is properly drawn with lines connecting nodes and most IMPORTANT ; the panel can expend to fit the tree (dynamically).
can any one tell me how to get started ?
Many thanks !

My advice is to use a graphics framework, e.g. look at Piccolo:
http://www.cs.umd.edu/hcil/piccolo/index.shtml
If you put your panel in a piccolo scrollpane it will be able to expand in all directions, something that is very hard to achieve otherwise.
OTOH Piccolo is not a dedicated graph framework (which knows about the distinction of nodes and edges and how to connect them). It comes with an example, though how to implement that.
There are more dedicated graph frameworks, e.g. JGraph:
http://sourceforge.net/projects/jgraph/

Binary tree using inorder traversal algorithm

I need to draw a Binary tree using Inorder traversal algorithm.. in java applets using rectangles and ellipse objects.. can anyone help me about this ? I will be really thankful to yu

I think this is my psychic Sunday, so here's my attempt at answering
this vaguely stated question. First have a look at this fine piece of
ASCII art:--------------------------------------------   ^         ^
| A                    T                     |   |         |
|                                            |   |        root
---------L-----------------------R---------+   |         v
| B                    | C                  |   |
|                      |                     |   |
|                      |                     | height
|                      |                     |   |
|                      |                     |   |
|                      |                     |   |
|                      |                     |   |
|                      |                     |   |
|                      |                     |   |
|                      |                     |   |
-------------------------------------------+   v
<--------------------width------------------->Suppose you have a rectangle 'width' wide and 'height' high. The root
of the tree can be drawn at position T and (if present), two lines can be
drawn to the positions L and R respectively. Now recursively call your
same method using the computed rectangle A and B for the left and
right subtrees L and R respectively.
kind regards,
Jos

Need Help for Image Processing

Hi everyone,
my name is Davide and I am a new member. I apologize in advance for my English that It's not very good.
I have to do an exercise where I have to draw a SAR(Synthetic Aperture Radar) Image. The problem is that the input image is composed by a binary raster plus an XML parameters file. The XML file contains all the information to correctly read the image.
I downloaded Java Advancing Imaging Library but I've never worked with this image format and I don't know where to start.
Can anyone help me? How should i do with the binary raster file? How can i read it?
Thank you very much.

Hi everyone again,
I followed your advice and I studied the theory on raster data so I have made some step forward. Now I have a new problem that I will try to explain you in the better way. I was able to obtain from the binary raster data an array of float.
From the XML parameters file I know that the rows number are 1000, the columns number are 2000, the pixel type is complex float and that the real and imaginary parts are put side-by-side on a column basis. I created two array, one of the real parts and one of the imaginary parts:
for (int i=0;i < SIZE_X*SIZE_Y; i++){
   if(i%2 == 0){
      real[k] = bin_input;
if(Math.abs(real[k]) > max_value_re){
max_value_re = Math.abs(real[k]);
k++;
}else{
img[n] = bin_input[i];
if(Math.abs(img[n]) > max_value_im){
max_value_im = Math.abs(img[n]);
n++;
Then I create an array with the absolute value of complex number:for (int i=0;i < SIZE_X/2*SIZE_Y; i++){
mag[i] = (float) (Math.sqrt(Math.pow(real[i]/max_value_re,2) + Math.pow(img[i]/max_value_im,2)));
Now I have an array of float with values from 0 and 1. I tried to create a gray scale image because in the XML file it says that the number of channels is 1:BufferedImage theImage = new BufferedImage(SIZE_X/2, SIZE_Y, BufferedImage.TYPE_4BYTE_ABGR);
WritableRaster wr = (WritableRaster) theImage.getData();
wr.setPixels(0, 0, SIZE_X/2, SIZE_Y, mag);
File outputfile = new File("C:\\Sviluppo\\workspace\\Java\\SAR\\Milano.png");
try {
ImageIO.write(theImage, "png", outputfile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
The problem is that the image is all black as if the method is not able to interpret the float values and puts everything at zero.
First of all, do you think the process can be right or is there some logical/theorical error? If it's ok, How can I fix the problem?
Thank you.

Shape layer questions

I’m a web designer that’s used to using Illustrator for all my work. Recently many of my new jobs want me to work in Photoshop, so I’m getting back up to speed with it. I have a few nagging issues that I haven’t been able to figure out:
With the direct selection tool, how do I select a small shape that’s overlapping a larger shape? For example, a small line on top of a large rectangle. When I try to do this Photoshop automatically makes me select the larger shape in the background. I have to zoom in super close and individually shift-select each corner of the smaller shape before I can move/transform/whatever it. This gets tedious and slow real fast!
Recently in a document I’m working in, whenver I make a new shape it automatically adds a bunch of layer styles like drop shadow, stroke, etc. These styles aren’t turned on, but it adds unecessary styles to my layers and my client is very strict about recieving only super clean .psd’s.
How do I make a line that is truly 1px stoke width? My lines seem to always start out as fuzzy 2px worms until I zoom in and surgically make them 1px. Again, what a waste of time! is there some sort of antialiasing setting that I need to turn off?
Thanks!

1. With smaller shapes that are difficult to select, try selecting their layer first. If you are not sure which layer, switch to the Move tool (V), hold Ctrl and click on the small shape. With the default behavior in Photoshop you should be able to select the layer and then use the Direct selection tool to select points on the vector path of the small shape. If you want to just move the entire shape when its the only path on a layer, aside form using the Path Selection tool (black arrow), you can just use the Move tool (V) to change the position of the layer. If you have to deal with a lot of shape layers that you just want to click and move, enable the Auto Select for the Move tool in the Properties bar. Then holding Ctrl while using the tool will toggle to its non - Auto Select mode.
2.On the Tool's property bar under the main menu, make sure the chain button is not pressed then click on the Style swatch or arrow to the right of the chain button to open the style swatch popup and from its menu there choose No Style. Next shape layer you make will not have the current style automatically applied.
3. I'm using CS5 on a pc and creating 1 px straight line with the Line tool is buggy with its alignment to grid. The Line Tool draws lines in Shape mode as rectangle vector paths. The difference between the Rectangle Tool and the Line tool is that the Line tool aside from having a Weight attribute, it draws the rectangles starting from the middle if its side. In order to snap it to grid you have to set the grid in the settings to Gridline every 1 pix and Subdivisions 2. If properly working this is supposed to solve your problem if you enable snap to grid and draw your lines starting in the middle of a pixel. The problem is that this doesn't work properly with the Line Tool which does not snap perfectly to the grid. The work around is to draw your lines with the Line Tool in Fill Pixels mode which has an Anti-aliasing option that you can turn off.
Another alternative for drawing lines on raster layers without anti-aliasing is to use the Pencil tool and hold Shift while dragging with it. The Pencil Tool in Photoshop is the same as the Brush tool but without anti-aliasing. I think more proper name would be non - anti-alised brush.

Do you need Photoshop to make apps for iPhone?

Which Photoshop would be best to get? If you don't need Photoshop, then where would I design my apps? Can I design it in xcode?

Sorry, I haven't owned a copy of Photoshop since 1997 I think. I think that was a student version I paid $250 for. If you want information on Photoshop, I suggest asking in a Photoshop forum. As a developer, Photoshop has little value for me. Sure it has lots of features, but I am way too busy to learn them. Give me fast and easy instead.
A vector tool is a program that allows you to create vector imagery. These images a composed of mathematical definitions instead of pixels. They can be scaled up or down with no loss of resolution. When you draw with a vector tool, you can make perfect circles and other shapes that would be impossible with freehand drawing in a raster tool like Photoshop. Popular vector formats are Adobe Illustrator, EPS, SVG, and sometimes PDF.
Vector tools are important for developers because you can build your artwork in a vector tool and easily scale it up or down to match your device. You can't just shrink down a big image to make it smaller. It will be smaller, but blurry and lower quality. Using a vector tool gives you more control to shrink down and maintain crisp outlines and recognizable shapes.

Drawing Binary Diagrams/Trees in Java

I am needing some of ur expertise. I am requiring to represent a binary decision diagram using Java. The size of the binary decision diagram will vary (e.g. different number of nodes and edges) need some help or advice to find out as to how to do this in Java 2D? and how would it be possible to make the diagram editable (Move, resize).
Many thanks

Lulu wrote:
Hi there
I have several questions about binary trees
Let's see, I use TreeMap to create them with the following code:
TreeMap treeMap = new TreeMap<Integer, String>();
treeMap.put("first", "Fruit");
treeMap.put("second","Orange");
treeMap.put("third", "Banana");
treeMap.put("fourth", "Apple");You've defined the map to hold integer keys and strings as values, yet you're trying to add string keys and string values to it: that won't work.
If this is a map how do I define if the data should go to the left or to the right of certain node?That is all done for you. In a TreeMap (using the no-args constructor), you can only store objects that are comparable to each other (so, they must implement the Comparable interface!). So the dirty work of deciding if the entry should be stored, or traversed, into the left or right subtree of a node, is all done behind the scenes.
Also note that TreeMap is not backed up by a binary tree, or a binary search tree, but by a red-black tree. A red-black tree is a self balancing binary tree structure.
Should I have dynamical keys so that they increase automatically when adding new data?
According to a webpage I should use Comparator(), is that to find the data in the tree and retrieve the key?
ThanksI am not sure what it is you want. I am under the impression that you have to write a binary tree (or a binary search tree) for a course for school/university. Is that correct? If so, then I don't think you're permitted to use a TreeMap, but you'll have to write your own classes.

Raster dpi? vs Vector

I am new to Illustrator, so this might be a simple answer. I designed a logo and business card in illustrator CC. When I try to export it says warning! my raster resolution is 72 dpi. I know I set up the document for 350dpi. I don't know which item on the design is raster or how to change it to 350dpi. I was not aware that I was making anything raster; I thought it would be a vector drawing (logo) and text boxes.

No. It's just made of basic shapes and text boxes. I set up the document as 300dpi before I started. I built the logo in one file and then copied it to my business card template file. Is that a problem? I'm trying to get it out of Illustrator in a format that meets the requirements for sending it to the online printer. I've tried several different ways (Illustrator, InDesign, Pages) to accomplish this. I'm just not skilled enough in any of them, I'm afraid. I can build it easily in Pages since that's all I had for years, but I can't export high enough quality out of there. They accept ai files, but I keep getting this warning about low resolution.

Using Oracle "Import PDF" Extension in Open Office Draw to Edit pdf Files

I am a fairly new Mac user with OS X 10.6. For several months, I have been trying to find something which would edit pdf files better than Preview does (for example, the content of a text box in Preview can only be "center aligned"). Skim and FormulatePro were two options I tried that were improvements over Preview in many respects, but wouldn't let me paste an image onto my pdf (such as, for example, if I wanted to put my digital signature on a document).
Then, I "discovered" the Oracle PDF Import Extension which I had installed in Open Office months ago, but hadn't really used. By "discovered," I mean I read on somebody's blog that you could use Open Office Draw to edit pdf files and I thought, "Hey, I wonder if that would work with my setup." (Boy, do I feel stupid.)
I have just started using this functionality, but in just an hour or so of playing around, I have found that it has far exceeded my expectations and, even, my immediate needs. Besides giving you (a) all the control over text and text boxes that you would expect from, say, a word processing program and (b) allowing you to paste images onto your pdf, Open Office Draw also includes layers!
The layer function threw me off for a bit, because, at first, I kept finding that my attempts to edit the document resulted in grabbing the raster image and moving it "off" of the underlying text layer (a function, I will admit, that I think will be worth exploiting someday, but wasn't what I was looking for at the moment). Then, I discovered that you can "lock" the layer so as to prevent this annoying occurrence. To create your edits, simply create a new layer (call it "MyEdits" or whatever you want) and you're in business.
Anybody who has done anything more than drawn a couple of lines and boxes on a page has discovered that editing the overlapping objects can be a real pain - if not an outright impossibility. Separating these overlapping objects through the use of different layers solves the problem.
The only downside to the use of Open Office Draw as a pdf editing tool that I can see is that you must import the pdf, save your edits in odg format, and then export it to pdf when you're done. I know that we would all like to have the capability of doing everything I just described directly to the native document, but, hey, for all the functionality I have been searching the internet for weeks to find, I think it's a reasonable trade off.

Try turning off protected mode.

Problems with Printing a PDF of DWG with details as raster refernces???...

So, I'm trying to print a detail sheet that has a few client details refenced as raster images among our own details. Made a PDF using Adobe PDF. Unfortunately, when printing the PDF of this sheet, somehow the raster details get scaled down and a huge black border appears around where the extents of the original image was in the PDF....
After doing some more digging I noticed that if I uncheck "print as image" in Adobe, the problem goes away. Unfortunately, the "print as image" option is generally very helpful for printing large drawings or drawing sets...
Any idea how to fix???
Thanks guys!

Bruce De Benedictis wrote:
I looked at the specs, and it seems this printer has PostScript emulation.
The Australian stores I looked at showed that PS was an option with this model, with the Samsung proprietary language as standard.
These days, emulators are quite good,
I've never seen a machine running a PS emulator do a good job with a large file, especially when it is a multifunction as the CPU still has to be informed of the other functions while it is processing the spool file.
so I would be more likely to suspect that you would get more bang for the buck by adding memory to the printer. You could probably find that fairly inexpensively, if you go for third-party memory. Manufacturer-supplied memory for printers is usually outrageously expensive.
Agree with this. More memory would help if it hasn't got the maximum already and vendor supplied memory is always dearer than 3rd party.
Other ways to get around memory limitations are to print only a few pages at a time, and also to turn off collation.
Collation is an issue when performing multiple copies. But when the file is a multiple page single document then the Collate button has no impact.

Creating a text with transparent background using javax.media.j3d.Raster

Hi, I'm trying to display a text in Java3D using the Raster but I'm not sure to make the background of the text transparent. Does anyone have any ideas.
Here's my code for creating the Raster image:
private javax.media.j3d.Raster getRaster(String str, boolean rotate) {
// Create an empty raster.
javax.media.j3d.Raster raster = new javax.media.j3d.Raster();
// Get a font metrics.
Font font = new Font("Times", Font.PLAIN, 12);
FontMetrics fm = getFontMetrics(font);
// Calculate the raster size.
int width = SwingUtilities.computeStringWidth(fm, str) + 6;
int height = 18;
// Create an BufferedImage.
BufferedImage image = new BufferedImage(width,
height,
BufferedImage.TYPE_INT_BGR);
// Draw the input string on the BufferedImage.
Graphics2D g2d = (Graphics2D) image.getGraphics();
g2d.setFont(font);
g2d.setColor(Color.WHITE);
g2d.drawString(str, 3, 14);
// Set the BufferedImage to the raster.
raster.setImage(new ImageComponent2D(ImageComponent2D.FORMAT_RGB, image));
raster.setSize(width, height);
raster.setType(javax.media.j3d.Raster.RASTER_COLOR);
raster.setCapability(javax.media.j3d.Raster.ALLOW_IMAGE_WRITE);
raster.setCapability(javax.media.j3d.Raster.ALLOW_SIZE_READ);
return raster;
Thank you for your help.

Hi,
If you create a new transparent imge you can put a color fill layer below the text layer and either turn off the layer visiblity for the color fill layer (eye beside the color fill layer in the layers panel)
or delete the color fill layer before saving the file as a transparent png.

Photoshop Script Black and White Raster to Vector

I do not have AI Adobe for I do not want to spend the money and have to learn an other complex Adobe application. I'm no artist either. However at rimes I wanted to have AI live trace feature to change black and white line drawing into vector graphics. AI creates EPS files with embedded vectors. And can export the vector to Photoshop. Though Photoshop opens EPS as raster layers I find that EPS file created from tracing black and white lines and artwork with programs like potrace that use curves to create black vector shapes. That when these are opened in Photoshop as Black layer with transparency. When these layers transparency are loaded as a selection and the selections converted to path. I find the path are extremely good.
Potrace is a cross platform open source program packages available for many operating systems. Windows (32 bit) and (64 bit), Mac OS X (Intel), Mac OS X (universal),Linux (32 bit) and (64 bit), Linux (Alpha), Linux (Sparc64), Sun Solaris (Sparc), Sun Solaris (i386), Sun Solaris (x86_64), FreeBSD (i386), NetBSD (i386), OpenBSD (i386), AIX and AROS (i386). Potrace is a command line command. So it can be use started with options and passed a file from bat files and scripts. Potrace requires No instillation. All the needed potrace requited files just need to be place into a folder and potrace run from that folder as the current directory.
So a created a Photoshop script that more or less uses potrace like a Photoshop Plug. The script define a custom shape for the current active document using potrace and add a new shape layer using the new defined custom shape as the top layer. The script also toggle off the other visible layers so you just see the shape layer. You can use alt click on the shape layer visibility icon to toggle the other layer visibility so you can see how well it matches the document.
I'm a windows user so the Photoshop script I wrote though in javascript will most likely only run on a windows platform because of my use of windows features its command line start command and file system conventions. I'm quite sure a Mac variant could created. Here is screen capture showing how well the defile shape matches up and a link to the script. You would need to download potrace to use it and fix the vars in the script that point to potrace. http://www.mouseprints.net/old/dpr/potrace.jsx

Good day!
Please check out the chapter "Automation" in the Reference.
If the task can be recorded as a plain Action it can be applied to multiple Files for example via File > Automate > Batch or File > Scripts > Image Processor.
Regards,
Pfaffenbichler

Drawing "wires" in Illustrator CS4?

I have tried using Photoshop to tidy-up a scanned wiring diagram saved as a TIFF. The diagram consists of many (almost) vertical and horizontal lines (the wires) which I want to straighten and color. Some wires are two colors, so the lines need to be banded or striped in some way.
I have never used Illustrator, but in this thread it emerged that it was the better tool for the job (there are sample images there).
Any suggestions on how best to accomplish my task?

Look at the online help for the basics of:
Drawing paths and assigning strokes to them.
Appearance Palette's Add Stroke and Add Fill commands. Understand that youi can apply more than one stroke and/or fill to a single path.
Pattern Brushes.
Graphic Styles.
For wiring diagrams, use the ability to apply multiple strokes to a single path. Each stroke can have its own weight. For the diagonal stripes, use a PatternBrush, and make the PatternBrush one of the multiple strokes applied to a path. Store such combinations as Graphic Styles so they can be applied to other paths with one click.
The sample below shows a set of Pattern Brushes I use for wiring in isometric illustrations, but the principle is the same. The Brushes would work fine for flat schematics. Wires like 2 and 5 would not require using Brushes; they could be done by simply applying two strokes to a path in the Appearnace palette. (They are Brushes in my sample, in order to include the terminal ends.)
Wire 4 is an example of using a Brush to create a stripe. The wire has two strokes, with a different Brush applied to each. The top stroke has the stripe Brush applied; the bottom stroke has the simple shaded Brush (with trimmed insulation ends) applied. Again, the bottom Brush would not be necessary if it were not for my intent to include the trimmed ends. In a schematic, that wire could be done with a set of three strokes: A thick stroke at the bottom to create the outer edge color; a middle stroke somewhat narrower to create the middle color; and a top stroke with the spiral stripe Brush applied.
...it emerged that it was the better tool for the job...
Yes. Please don't use Photoshop for wiring diagrams. Such diagrams need to be resolution-independent vector artwork. Think of your downstream users. Wiring schematics often become large and complex, requiring large sheets with relatively small text. A nice PDF containing vector artwork can be zoomed indefinitely to trace a circuit with legible text; and the file size is usually much smaller than if it were a large raster image. (Tech illustrators hate it when technical drawings like schematics default to a dumbed-down raster format. Just makes it a royal pain to work with and modify.)
JET

Does illustrator cs4 draw in vector?

Hello I am looking to buy what adobe program I need, I was told adobe illustrator is a vector drawing program. Ok so my question is does that mean it is only capable of converting to vector or does that mean that if i start a new document (ANY TYPE OF DOCUMENT) and create a design will the design be in vector format?
Reason I am asking, I am currently the owner of a small sign, banner and decal business and I am running FlexiSign for my Cutting Machine. For My banners I subcontract the jobs to a bigger outfit who has proper machines to print. They need all designs to be in vector, .pdf format. So instead of having to convert everything all the time I want a program that can make the design and it is already in vector, than if i need to import a raster image I understand that I will than need to convert to vector and that is fine, but for the backround and font and whatever else I put in the design does illustrator draw in vector, like my flexi sign does, because if I create a job in flexi sign and send it to him it is already in vector, I would rather be using a adobe product...........PLEASE HELPPPPP

Matthew,
Illustrator is primarily a vector drawing program.
That does not mean that everything in a given Illustrator document is all vector artwork. An Illustrator document can contain vector paths, text objects, and raster images. It contains features that perform rasterization on-the-fly in order to apply effects to vector paths.
Nor does something being "vector" necessarily mean it is suitable for vinyl cutting. For example, you can apply gradients and blends to paths, and everything is "vector"; but you would not be able to render it on a vinyl cutter. For an even more basic example, you can apply strokes of any weight (thickness) to a vector path; but that by itself does not make it suitable for cutting--if you sent it to a cutter, you would just get a single cut along the center of the path.
So yes, you can use Illustrator to draw the kinds of paths that you need for your vinyl cutter. Many people do. (Corel Draw is more popuplar among sign shops.) But you need to know what you're doing; which features to use, which to avoid, and how to properly optimize the vector paths for cutting (removing overlaps, merging cross-cuts, outlining strokes, etc.)
You'll most likely need to back-save the properly-prepared artwork to an earlier version. Most vinyl cutting software can import .ai format, but not usually the current version.
Your designer is working against you by building artwork in Photoshop, if that artwork is intended for
cutting. For vinyl cutting, the artwork should be drawn as clean vector paths.
Except for certain "special cases", autotracing raster images should not be used for vinyl cutting. And in those cases, you need to fully understand what you are doing. Give up on the misconceived idea that you can just create any artwork you want, willy-nilly in Photoshop, and then use autotracing to magically "convert" it to vector artwork. That is a myth. Usually, you'll just be substituting one kind of jaggedness for another. (I've seen many sign shops do this, thinking the resulting roughness is "normal", and turn out garbage.)
You say you contract out your "banner" work to an outfit that has a large-format
printer. Yet you say that outfit insists on everything being vector. That is rather contradictory. You need all vector paths for
cutting. But any decent large format
printer can print artwork consisting of vector paths, raster images, or a combination of both.
JET

Can Acrobat convert a scanned in raster pdf to vector pdf?

I scanned a paper electrical schematic into Adobe Acrobat X. I believe this copy is a raster copy. I'd like to know if Acrobat can convert the raster to a vector pdf?

I think that, to get a good result, you would/could put the raster image in one layer in Illustrator, re (vector) draw it and then delete the raster layer.
Dave Merchant wrote:
Illustrator can 'trace' a raster image but you won't get exact results.

Drawing a Binary Raster

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