image-rotation

I want to get some specific parts of an image so I'm cropping the images. However, when I want to get a part that is not parallel to the image, I rotate the image and crop afterwards. I don't want to rotate the image and crop a parallel rectangle. What I want is, without rotating the image, to crop a rectangle with an angle from the image. Is there any way to do that? I think I couldnt express myself well enough. This is what I want to do: example picture . Assume the red thing is a rectangle :) I want to crop that thing out of image. After cropping it doesn't need to be angeled. So mj can lie

This question already has an answer here: Java: Rotating Images 4 answers I have managed to rotate an image 180 degrees but wish to rotate it 90 degrees clockwise can someone edit my code so that it does this with explanation. Thanks. private void rotateClockwise() { if(currentImage != null){ int width = currentImage.getWidth(); int height = currentImage.getHeight(); OFImage newImage = new OFImage(width, height); for(int y = 0; y < height; y++) { for(int x = 0; x < width; x++) { newImage.setPixel( x, height-y-1, currentImage.getPixel(x, y)); } } currentImage = newImage; imagePanel.setImage

My application fires up sprite instances around a Canvas which then move across the screen towards a x/y coordinate. I would like to be able to rotate the sprite around its center so that it faces its destination coordinates. I am using a sprite-sheet and have had issues with clipping. I have also found a lot of good examples but nothing seems to cover exactly what I'm looking for. This example is very close but for efficiency I am using an ImagePooler class and cannot reload an image on each draw/rotation. So if someone had an idea on how to rotate the preloaded image w/out cutting my sprite

My Plain Code without interpolation: im1 = imread('lena.jpg');imshow(im1); [m,n,p]=size(im1); thet = rand(1); m1=m*cos(thet)+n*sin(thet); n1=m*sin(thet)+n*cos(thet); for i=1:m for j=1:n t = uint16((i-m/2)*cos(thet)-(j-n/2)*sin(thet)+m1/2); s = uint16((i-m/2)*sin(thet)+(j-n/2)*cos(thet)+n1/2); if t~=0 && s~=0 im2(t,s,:)=im1(i,j,:); end end end figure; imshow(im2); This code creates black spot, the problem is how to do interpolation? Thank you all for any illumination. P.S. Not asking for build-in function: imrotate(im1,1/thet,'nearest'); To rotate the image without the black spots, you need to

This question already has an answer here: Rotate image by 90, 180 or 270 degrees 9 answers I'm capturing image from webcam and I need to rotate it by right angle. I found myself theese functions: getRotationMatrix2D - to create rotation matrix (whatever it is) transform - transform one matrix to another by rotation matrix But, I don't get anything but black area. This is my code: if(rotate_button.click%4>0) { double angle = (rotate_button.click%4)*90; //button increments its click by 1 per click Mat transform_m = getRotationMatrix2D(Point(cam_frame_width/2, cam_frame_height/2), angle, 1); /

I am making a winforms application. One of the features I hope to implement is a rotating gear on the home form. When the home form is loaded, you should hover over the picture of the gear, and it should rotate in place. But all I have so far is the RotateFlip and that just flips the picture. Is there a way to make the gear turn in place when the mouse is hovering over it? The code I have so far is: Bitmap bitmap1; public frmHome() { InitializeComponent(); try { bitmap1 = (Bitmap)Bitmap.FromFile(@"gear.jpg"); gear1.SizeMode = PictureBoxSizeMode.AutoSize; gear1.Image = bitmap1; } catch (System