I'm having an hard time finding how to draw/print a String in a canvas, rotated 90º, NOT vertical letters. After some different approaches without success I was trying to follow one that would involve printing the Graphics object to an Image object. As the API is reduced it has been a difficult task.
So basically what I'm asking you guys is if you know how to draw a String rotated 90º in a Canvas or if you don't, how can I save the graphics object to an Image one so I can follow my "hint".
Thank you very much!
Guilherme
Finally, one last research in the web and here it is:
//The text that will be displayed
String s="java";
//Create the blank image, specifying its size
Image img=Image.createImage(50,50);
//Create an instance of the image's Graphics class and draw the string to it
Graphics gr=img.getGraphics();
gr.drawString(s, 0, 0, Graphics.TOP|Graphics.LEFT);
//Display the image, specifying the rotation value. For example, 90 degrees
g.drawRegion(img, 0, 0, 50, 50, Sprite.TRANS_ROT90, 0, 0, Graphics.TOP|Graphics.LEFT);
from: http://wiki.forum.nokia.com/index.php/How_to_display_rotated_text_in_Java_ME
Thank you!
Related
In Lightroom, I can resize images to a pixel value for the long side. That way if, for example, an image is five times as tall as it is wide, and I asked for a 2,000px (long side) image, the result will be 2000x400px. Not 10,000x2,000px.
In other words, the aspect ratio is maintained, and 2,000px is a limiter.
Can sharp do this, and maintain the aspect ratio -- when I don't know in advance whether the height or the width will be greater?
Otherwise I will have to pull the exif data from the images so that I know in advance which is greater, and can resize based on the greater side (width or height). I am trying to avoid this step.
Below is my current code and it creates 300x300 images, ignoring the aspect ratio. However the desired result is:
300x200 images, when given images whose aspect ratio is 3:2
200x300 images, when given images whose aspect ratio is 2:3.
etc.
exports.resizeResolutions = {
mapThumbnail: {x: 300, y: 300},
}
exports.fitMethods = {
inside: "inside",
}
proc = sharp(path.join(pathToLocalFSGalleries, folder, file),
{ fit: fitMethods.inside }).resize(resizeResolutions.mapThumbnail.x, resizeResolutions.mapThumbnail.y);
await proc.toFile(path.join(pathToThumbnails, folder, file));
I have pictures of buildings I want to classify, and I want to get rid of the sky as I think it is messing with my classifier. I know that OpenCV has a function called inRange, that takes in the image and blacks out everything not in the range of the two color bounds that you provide. I was wondering if there was a function that literally did the opposite. Or another way I can accomplish what I want.
Thank you!
cv2.InRange creates a mask, which basically means it creates an image of the same size where the pixel values that are in the range are 255, and the values outside the range are 0.
https://docs.opencv.org/2.4/modules/core/doc/operations_on_arrays.html#void%20inRange(InputArray%20src,%20InputArray%20lowerb,%20InputArray%20upperb,%20OutputArray%20dst)
If you want to have the opposite of that you can take the output of cv2.inRange and perform a bitwise_not:
https://docs.opencv.org/2.4/modules/core/doc/operations_on_arrays.html#bitwise-not
If you want to then use that to black out the pixels in your original image you could do a bitwise_and:
https://docs.opencv.org/2.4/modules/core/doc/operations_on_arrays.html#bitwise-and
So I would do something like:
mask = cv2.inRange(img, (255, 0, 0), (100, 0, 0)) # modify your thresholds
inv_mask = cv2.bitwise_not(mask)
no_sky = cv2.bitwise_and(img, inv_mask)
I have to multiple images merged as one sprite image. These images are not part of some animation, it's just different static images.
I need to load them somehow in Createjs/EaselJS but I don't know the template of json for spritesheet data.
All search results points to how to make sprite animation, but I don't need animation, just static images by id.
Can anyone provide an example how to achieve this?
Here is an example for your json file:
{
"frames": [
[0, 0, 120, 200],
[140, 0, 350, 400]]
}
Every item in 'frames' describe one frame in your spite image. There are 4 values per each frame. First 2 stand for frame's position in the sprite. [0, 0] left-upper corner for frame #1 and [140, 0] for frame #2. Other 2 value describe frame size (120x200 and 350x400 in my case).
Load this json and your image into EaselJS and then instantiate as a Sprite. Like this:
var ssheet = new createjs.SpriteSheet(ss);
var sprite = new createjs.Sprite(ssheet);
Don't use play method as it's not animation in your case. Just call gotoAndStop(0) for the first frame and gotoAndStop(1) for the second frame.
Now add your sprite to the stage.
I am new to using KineticJS and am using it to develop a simple 2D game which involves sprites, collision detection etc.
I need to access various properties of my sprite object (let's call it spriteObj here).
I can get to the sprite coordinates using spriteObj.getX() and spriteObj.getY() and this works perfectly.
Now I need to also retrieve the other properties of the sprite, such as height and width, but there does not seem to be a way to do it. Specifically if I have an animation within my sprite, how can I retrieve the current frame and/or the x, y, height, width of that animation frame.
What I really need is something like spriteObj.getWidth() and spriteObj.getHeight() but these do not exist. Any suggestions please? I can see nothing on the html5 tutorials page for this (see here)
Thanks,
Owen
The methods you are looking for do exist, check the KineticJS Sprite API
Here is the KineticJS Sprite Tutorial
Here are the functions you asked for:
Sprite.getX()
Sprite.getY()
Sprite.getWidth()
Sprite.getHeight()
Sprite.getIndex()
Based off of that tutorial I added some code to fit your needs, check the console.log to see the methods in action. For the width and height, although it is not necessary, you have to specify a width and height property on your spriteObj or else it will just return 0.
var blob = new Kinetic.Sprite({
x: 250,
y: 40,
image: imageObj,
animation: 'idle',
animations: animations,
frameRate: 7,
index: 0,
width: 80,
height: 100
});
And a new button to test the getIndex() function:
// stop animation
document.getElementById('stop').addEventListener('click', function () {
alert(blob.getIndex());
}, false);
jsfiddle
In my j2me App I have tried canvas which works great on Nokia phone but doesn't run on samsung. For that I have to switch to some FORM which in both cases works but only issue is of size, if I create smaller image to fit for both phone screens, one (samsung) shows that ok but other (nokia) leaves a lot more space and vice versa.
I need to have code that could stretch my image and just fix if to the screen size which I basically get by form.getHeight() and form.getWidth() property. I wonder if there is property of Image.createImage(width, height) then why doesn't it stretch it to the value I provide?
my code for that is below
try {
System.out.println("Height: " + displayForm.getHeight());
System.out.println("Width: " + displayForm.getWidth());
Image img1 = Image.createImage("/bur/splashScreen1.PNG");
img1.createImage(displayForm.getHeight(), displayForm.getWidth());
displayForm.append(new ImageItem(null, img1, Item.LAYOUT_CENTER, null));
} catch (Exception ex) {
}
Image
A single image will not fit all screens. But more will do.
The smaller logo image should be less than 96x54, as this is the smallest screen resolution. This image can be used up to the resolution of 128x128 without problems. With bigger resolutions it will look tiny, though.
The bigger logo image should be a bit bigger than 128x128 and can be used up to 240x320.
The code bellow gives as example of how to implement this.
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Graphics;
class Splash extends javax.microedition.lcdui.Canvas {
Image logo;
Splash () {
if (getWidth() <= 128) {
// sl stands for Small Logo and does not need to have a file extension
// this will use less space on the jar file
logo = Image.createImage("/sl");
} else {
// bl stands for Big Logo
logo = Image.createImage("/bl");
}
}
protected void paint (Graphics g) {
// With these anchors your logo image will be drawn on the center of the screen.
g.drawImage(logo, getWidth()/2, getHeight()/2, Graphics.HCENTER | Graphics.VCENTER);
}
}
As seen in http://smallandadaptive.blogspot.com.br/2008/10/showing-splash.html
wonder if there is property of Image.createImage(width, height) then why doesn't it stretch it to the value I provide?
Parameters in this method have nothing to do with stretching, see API javadocs:
public static Image createImage(int width, int height)
Creates a new, mutable image for off-screen drawing.
Every pixel within the newly created image is white.
The width and height of the image must both be greater than zero.
Parameters:
width - the width of the new image, in pixels
height - the height of the new image, in pixels
Image class (API javadocs) has two more createImage methods that use parameters called "width" and "height" - one with six, another with four arguments but none of these has anything to do with stretching.
In createImage with six arguments, width and height specify size of the region to be copied (without stretching) from source image.
In method with four arguments, width and height specify how to interpret source ARGB array, without these it would be impossible to find out if, say, array of 12 values represents 3x4 image or 4x3. Again, this has nothing to do with stretching.