I have this JAVA swing desktop application where i am printing some reports.
The reports contain some text and some images.
These images, when displayed on the screen through my application, looks absolutely fine.
But when the same image image is sent for printing on a formatted document, the image part looks degraded in quality but the text remains perfect.
Any suggestions on how to go about this?
P.S. The application is being used at more than 100 different centers. It is not a printer issue as all the printers can not be defected at the same time. I was thinking if any one could suggest me on how to set the dpi of the document to be printed so that i could get a higher resolution.
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My CodenameOne app is mainly intended to be the iOS counterpart of an existing Android app. It is for older devices, in fact, as soon as possible, or in the future, a Swift app is going to replace it for OS 14>.
I need some customised icons and I have the svg code for it.
Initially I had to use the Flamingo tool, that converts svg files in Java classes.
I used it like
ScaleImageButton appButton=new ScaleImageButton(new AppIcon().scaled(doubleButtonSize,doubleButtonSize).toImage());
It is cumbersome but it does not even work on iOS.
So now I resorted to create png images for every icon in every dpi level, as it can also be done on Android.
I renamed the files so they follow the standard I think it is proposed in CodenameOne.
The possible names are:
verylow.png
low.png
medium.png
high.png
veryhigh.png
560.png
hd.png
2hd.png
4k.png
In the end it has to be used like
Image icon = theme.getImage("icon.png");
It seems that the images can be imported in the project in more than one way.
I was said to include them in the theme.
According to the CN1 developer guide I have to set the size for each.
If I import them as a whole (selecting the folder or selecting all images and hitting the "Open" button) in the theme editor a dialog appears with all wrong sizes (but they resemble a particular set of choice, although very unlikely).
They are not always the same sizes but neither they are defaulted according to the provided set of images.
I provide images as 24px, 36px, 48px, 72px, 96px, 144px, 192px, 288px, 384px for normal size icons, and also I provide double sized images for double size icons in my app (the values are not doubled as expected).
I also have to check "Square image" and "Preserve aspect ratio" options (my images are already square).
Then the strangest part is that there is a percentage, I see it is 20 for example.
The caption reads "will affect all entries". I understood that it is to scale images, that is what a developer just do not want, unless the developer has wrong sizes, but still proportioned among themselves, that cannot be the case I think.
However I do not need any scaling, the images are right as they are. I created them on purpose.
The developer guide is not enough clear to me.
So I am asking
is it right to tweak the wrong size to match the right ones, and what about the percentage?
This specific UI is a bit out of date by now and wasn't used much even when it was added. Most users opted to do desktop scaling for multi images.
The scale option is designed to scale down from a high resolution image on the desktop. You don't want/need that.
You don't need to edit the file. Just make sure to turn on the XML team mode and make sure your images use the right file names. Then once you save the images will appear in the resource file.
I suggest adding a multi-image using the standard method of add in the menu. Then replacing all the generated images with your copies and reopening the file, then saving again (the last save is important as it will override the res file).
We are working on Tensorflow to train a dataset of images.
To get images we record video using our phones and, using OpenCV in Python we extract each frame and save them as JPG images. I rotate some of them to portrait mode with the Photos App on Windows 10.
Then, we have our own annotation tool written in Java to label each item we see on the images. It return a CSV file for each object with their coordinates (in percentage).
However, when I ran the training yesterday, I noticed via the tensorboard interface that some were not annotated rightly (the ones I rotated with Photos)
Here is the image opened on Tensorboard, you can see that the can is very badly annotated.
It turns out that if I open this image with our Java software it is well annotated, but as you can see below, the image is horizontal (it doesn't take in account the rotation applied with Photos) :
If I open it with Paint, or the explorer it appears in portrait mode like in tensorboard.
An other fact, If I send the picture via Facebook, and download it again, it will appear in portrait mode on the Java tool as it would have been from the beginning.
I tried to rotate the image with Paint this time, and it appears correctly in the Java tool.
The code that displays the image in Java:
panel.image = New File(srcFile);
The code that saves video frame in Python:
cap = cv.VideoCapture(video_path)
while cap.isOpened():
ret, frame = cap.read()
if ret:
try:
cv.imwrite(output_img_path, frame)
except Exception:
pass
else:
break
cap.release()
Do you know why Java ignores the rotation applied via the Win10 Photos software, why it works via Paint ?
Is there a way to make Java take it in account because it would be very unpleasant to start again from scratch.
Thanking you in advance,
After noticing that rotating images with Paint instead of Photos was giving what we wanted, I found out what was wrong.
"If you’re using Windows 10, File Explorer and the default image viewer will properly obey the Exif Orientation tag, so photos that come from your smartphone or digital camera will be display properly. Google’s Android and Apple’s iOS both natively create photos with the Exif Orientation tag and support it." (source)
I used JPG autorotate to fix this.
Is it possible to turn off dpi scaling in my program/export it as non dpi scaling support? I have made a program using swt windowbuilder with eclipse, and it gets messed up on different dpi resolutions.
Is the only way to go about this to use something like MigLayout?
If so, can anyone point me on how to use that?
The program gets messed up with different dpi settings (and text scaling)
I haven't found anything very helpful in this subject, other than people giving advice on how to make the program dpi scale able. (which i do not need in this case, and would prefer it just be disabled if possible)
I am developing an application which can edit images. At the start of my program the user sees a list of folders that contain images. Instead of showing default folder icon i am showing an image from folder. I have database where i store path to images and information about which image is displaying in the list near the folder name. Every time when my application starts it takes a lot of time to load a scaled down image into memory and then display it, especially when there are a lot of folders with images and for each i need to load its icon. I have read this article http://developer.android.com/training/displaying-bitmaps/index.html and every time when my app starts i am scaling down every image.
May be the best way in this situation is to resize (not scale down) every image and then store it in the database? But i have read that this is not good.
So i want to ask an advice of how to do in this case? And i also need an advice of how to optimize displaying images in the Android Galllery widget to make it scrolling more faster. Thank you very much!
1 Never store images in database. It is inefficient and slow.
2 There are several image loading libraries that solve the same problem. My favorites are Picasso and Universal Image Loader
I have a console application which screen scrapes some data, and now I need to do image comparisons. If the images are different, I want to show the images to the user. What's the best way to display two images during the execution of a console application? I'm assuming I would use some sort of inter-process communication to send information back and forth, but I'm not sure how exactly I would go about doing that in a good fashion.
Also, I'd rather NOT store the images to files if possible. There's no reason to persist the data, and if the console application terminates unexpectedly, it's better if I don't have any dirt left on the file system.
Does anyone have any thoughts on how best to accomplish this?
I am not sure I understand the concern. You should be perfectly able to conditionally pop up either a Swing JFrame or AWT Frame from your console application, am I wrong?
You can use e.g. BufferedImage to construct images, or the utilities in javax.imageio if your image is already in some common format (e.g. PNG, JPEG, BMP). As for displaying to the user, just use the regular Java GUI stuff, either Swing or AWT. Run the GUI in a separate thread if the console part needs to keep processing while the images are being displayed.
The Working with Images tutorial may contain some helpful examples.