I`m currently making an application to manage other application on windows.
when i resize the icon it change quality
i`m getting icon by this code
ShellFolder shell = ShellFolder.getShellFolder(new File(load1.getString("Path")));
image = shell.getIcon(true);
And when i resize it it change the quality.
My resize code is
sIMG = image.getScaledInstance(45, 45, Image.SCALE_AREA_AVERAGING);
What i want to do to keep the quality of the icon.
Please help.
I'm assuming you want to re-size your icon to look the same no matter what size you change it to. Regular images will are composed of pixels therefore lost of quality is inevitable.
When I did a web design project at my school I learned about Vector images(.svg).
Summary Of Vector Vs Bitmap http://etc.usf.edu/techease/win/images/what-is-the-difference-between-bitmap-and-vector-images/
Of course anyone please correct me if I'm wrong but I think vectors is the only way you can achieve your goal assuming that I'm understanding your question. Vector image quality does not change much or at all on re-size.
Java doesn't natively support Vector Images but follow this tutorial and you should achieve your goal. (It's not really a tutorial more like copy and paste)
http://plindenbaum.blogspot.com/2009/07/simple-java-based-svg-renderer.html
Also this link will let you convert your existing images to SVG
http://vectormagic.com/home
(you get 2 downloads when you sign up) There are other tools to convert to SVG but this was the quickest solution I could find. If you're good with Photoshop I think I saw some tutorials for it but don't quote me on that.
I hope this is what you were looking for best of luck to.
you can resize any image by the following code.
$thumb = new Imagick();
$thumb->readImage('myimage.gif'); $thumb->resizeImage(320,240,Imagick::FILTER_LANCZOS,1);
$thumb->writeImage('mythumb.gif');
$thumb->clear();
$thumb->destroy();
For more information please go to the following link.
resize image
resize optimized image
Related
I am new on this community and i have no idea what I have to search for. So I hope there is no thread like this.
I want to create a java Android App in Android Studio where I can open a floor plan(image) and insert icons(images). If i click once on the icon it should be movable and the size of the icons should be adjustable with a seekbar.
I googled for these functions and the only thing I found was that:
https://developer.android.com/guide/topics/graphics/2d-graphics.html
Can someone tell me which is the best way to do that?
You can use normal ImageViews https://developer.android.com/reference/android/widget/ImageView.html
with events (OnClick, OnTouch).
If you want to resize view, check this answer
-https://stackoverflow.com/a/14283837/8180966
For rotation
//#param rotation The degrees of rotation.
imageView.setRotation(float rotation);
If you want your icons to look nice at any size, you should look at Vector Graphics (https://developer.android.com/studio/write/vector-asset-studio.html)
Hope, this will help :)
You may please visit the following page (especially layer list section of the page) of android developer site. There are a few things which you may be interested in and which may serve either as a solution or an alternative to your problem.
https://developer.android.com/guide/topics/resources/drawable-resource.html
I am new to computer vision but I am trying to code an android app which does the following:
Get the live camera preview and try to detect one logo in that (i have the logo in my resources). In real-time. Draw a rect around the logo if found. If there is no match, dont draw the rectangle.
I already tried a couple of things including template-matching and feature detection using ORB.
Why that didnt work:
Template-matching:
Issues with scaling and rotation. I tried a multi scale variant of it but a) the performance was really bad and b) the rectangle was of course always shown trying to search for the image. There was no way to actually confirm in the code if the logo was found or not.
ORB feature detection:
Also pretty slow (5-6 fps) but it worked ok-ish. The other problem was that also i never could be sure if the logo was in the picture or not. ORB found random matches even if the logo was not in the picture.
Like I said, I am very new to this. I would appreciate the help on what would be the best way to achieve:
Confirm if a picture A (around 200x200 pixels) is in ROI of camera picture (around 600x600 pixels).
This shouldnt take longer than 50ms per frame. I dont know if thats even possible though. So if a correct way to do this would take a bit longer than that, I would just do the work in a seperate thread and only analyze like every fifth camera frame or so.
Would appreciate any hints or code examples on how to achieve that. Thank you!
With logo detection, I would highly recommend using OpenCV HaarClassifier. It is easy to generate training samples from a collection of images of the logo, or one logo image with many distortions.
If you can use a few rules like the minimum and maximum size of the logo to be detected, and possible regions on the image where it can appear, you can run the detector at a speed better than you mention with ORB.
I have worked in java i need to resize proportionally as BC resizing images using fill_proportional algorithm. When U need resizing I have gone through different option and exact solution i am getting from BC, here they resize image that fit to layout. Click here to see BC comments. The solution on the above link is perfect and I am looking for the similar solution in java. So can anybody suggest me a solution in java to create an image that fill in a particular area like the link above?
I'm trying to develop a Java program that does the following:
uses a background picture of a network diagram of clients
positions an image of a bandwidth graph to respective client
refreshes the image of graph every 5 seconds which it fetches from another program that constantly produces snapshots of bandwidth
Now, I can set the background picture and I'm pretty confident that I will be able to refresh the images by using a timer. What I am trying to plan out is how I am going to position these images to the respective clients which is displayed in the background picture. I did some research and it appears that I have several options but I want to make sure I am choosing the right one before I run into problems further down the line.
It seems to me that using a GridBagLayout would be the choice for me, however I would like a second opinion for a more experienced population. If using a GridBagLayout is the correct choice, could you recommend any good tutorials that would help me understand this Layout Manager? Please keep in mind that I have limited experience with Java, especially with GUI oriented Java.
EDIT: If I am not explaining the concept well enough please let me know.
check this out-
http://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html
GridLayout is likely to meet your needs and it is easy to use - the assumption I make is that image of bandwidth graph is the same/fixed ...
Look for an example here
http://www.roseindia.net/tutorialsearch/?t=java+gridlayout+color
Try Google the keyword "GridLayout" - there are plenty of hits ...
If you want to do advanced layouts, you should take a look at MigLayout.
It's an extremely flexible layout manager that can pretty much act as a replacement for any/all of the existing Swing layout managers. It's worth using if you want to do difficult / complex layouts.
It feels more like a HTML table layout tool, enabling multi-column spans etc. and arbitrary scaling rules.
The "Quick Start Guide" is very good with lots of examples - I'd suggest taking a look at that if you want to evaluate MigLayout for your project.
If the 'bandwidth graph' image(s) is on top of the BG image, look to OverlayLayout
A layout manager to arrange components over the top of each other. ..
OTOH I would not use a layout strategy for this, instead..
Create a BufferedImage the size of the BG.
Paint the BG to the image.
Display the image in a label.
When it comes time to paint the graphs, get a Graphics instance for the image in the label, and paint them to that. If the graphs are always the same size and shape and do not have transparency, you can simply paint them. Otherwise, draw the BG first.
I have an image with 400x400 image to identify different components from it. But when I try to identify components using that most of time it doesn't provide correct answers. So I need to know whether there are some kind of methods in javacv or opencv to improve the quality of the image or increase the size of the image without effecting to its quality ?
This is the sample image that I use. (This is the maximum size that I can get and I can't use any photo editing softwares in the project, because it's dynamically generated image.)
In my image processing I need to identify squares and rectangles that connects those squares. And specially I need to get the width and height of those using pixel values.
You can scale it to any size, if you can vectorize it... and in your case vestorization is quite simple as you have some simple geometrical objects in image.
So, in my view your approach should be like this:
detect edges in the image with a high threshold (as you have very distinct objects)
vectorize them
scale them to any size
You should also look at the following link: Increasing camera capture resolution in OpenCV.
If you stick to image processing the easiest way to do it is to apply an equalizeHist(). This will increase contrast and will improve subsequent steps.
But, and this is a biiiig 'but', why are you doing it? Just reading this post, I saw another solution, and a quick google proved me I am right:
Kabeja is a Java library for parsing, processing and converting
Autodesk's DXF format. You can use Kabeja from the CommandLine or
embed into your application. All parsed data are accessible with the
DOM-like API.
That means you can extract directly all the data you want from that image in a text format. Probably something like "at position x, y there is a transistor, or whatever." So why would you render that file into an image, then analyse that image to extract the components?
If you do it for school (I know that many school projects are like this) I would recommend you to find a real problem to solve, and propose it to your teacher. You will be happier to do something that is not complete nonsense.
vectorizing the image is best option I guess as suggested by mocap.
you can also use enhancement tools like sharpening, saturating etc.