image-rotation

问题 I'm processing huge TIFF images (grayscale, 8 or 16 bit, up to 4 GB) to be used as high resolution input data for a machine. Each image needs to be rotated by 90 degrees (clockwise). The input TIFF can be LZW or uncompressed, the output may be uncompressed. So far I implemented my own TIFF reader class in Objective C (including LZW decompression) which is able to handle huge files and does some caching in memory as well. At the moment the TIFF reader class is used for visualization and

问题 I am working with OpenCV 3.1 and with Python. My problem comes when I try to deskew (fix the tilt of) an image with text. I am using cv2.warpPerspective to make it possible, but the image loses a lot of quality. You can see here the original part of the image: and then, here, the "rotated" image: it is like smoothed . I was using morphological transformation like: kernel = np.ones((2, 2), np.uint8) blur_image = cv2.erode(tresh, kernel, iterations=1) and white_mask2 = cv2.morphologyEx(white

问题 I have the following image I1. I did not capture it. I downloaded it from Google I apply a known homography h to I1 to obtain the following image I2. I want to assume that a camera has taken this above shot of I2. I have found the camera matrix of this "camera". Let this camera matrix be k . Now, I want to rotate this image I2 about the camera axis. According to the explanation in the accepted answer in this question, I need to set the rotation matrix R and then perform k*R*inv(k)*h on image

问题 So Im drawing a BufferedImage 'bird' but I want to rotate it according to the angle that it is falling. I have a bird object which contains the BufferedImage and a render() method which draw it rotated. public void render(Graphics2D g, ImageObserver io) { double theta = Math.tan((height - pastHeight) / .875); System.out.println(theta); Graphics2D g2 = (Graphics2D) bird.getGraphics(); g2.drawImage(bird, 100, (int) height, null); g2.rotate(theta); g2.drawImage(bird, 100, (int) height, io); } I

问题 I have a requirement where I have an ImageView and a button. http://i1289.photobucket.com/albums/b509/salikclub/Rotate-Last-Start_zps0d2fced8.png I want to rotate the image when I click the button. I need the image with full screen. but when I click the button image will be rotate, but not shown in the full screen. Please see the below link. http://i1289.photobucket.com/albums/b509/salikclub/Rotate-Last1_zps2ccb1326.png After that also when I clicked the button image will rotate. but

问题 I have a requirement where I have an ImageView and a button. http://i1289.photobucket.com/albums/b509/salikclub/Rotate-Last-Start_zps0d2fced8.png I want to rotate the image when I click the button. I need the image with full screen. but when I click the button image will be rotate, but not shown in the full screen. Please see the below link. http://i1289.photobucket.com/albums/b509/salikclub/Rotate-Last1_zps2ccb1326.png After that also when I clicked the button image will rotate. but

问题 I have researched enough to get this working but not able to fix it. After taking picture from camera as long as I have image stored as UIImage, it's fine but as soon as I stored this image as PNG representation, its get rotated 90 degree. Following is my code and all things I tried: - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSString *mediaType = [info valueForKey:UIImagePickerControllerMediaType]; if([mediaType

问题 I have a 3D array with some data (a raster 3D image). I would like to get a 2D cut through that array, using some suitable interpolation (preferably linear - that's probably "trilinear" in this case). The plane of the cut can be described however is convenient, for example using a normal vector and distance. If the cut is parallel to one of the axes, this is trivial, just slice the 3D array (with numpy index slice). But if the cut is not parallel to an axis, I don't see a good way to get

问题 i had tried various method and couldn't figure out how to achieve this.i searched on internet a lot but can't figure out. i have an ImageView (a wheel which spins) , i want to rotate it by 360 degree for 10 times(this is to just give user feel of fast turning wheel) , and then i want to rotate it by particular value say 90 degree( but it might be varying). after this animation finishes i want to bring ImageView back to the initial position. how do i achieve this ? Thanks in advance. 回答1: well

问题 i had tried various method and couldn't figure out how to achieve this.i searched on internet a lot but can't figure out. i have an ImageView (a wheel which spins) , i want to rotate it by 360 degree for 10 times(this is to just give user feel of fast turning wheel) , and then i want to rotate it by particular value say 90 degree( but it might be varying). after this animation finishes i want to bring ImageView back to the initial position. how do i achieve this ? Thanks in advance. 回答1: well