crop

问题 I made a chrome extension, which captures a single element (div) of a website. I used chrome.tabs > captureVisibleTab to make a screenshot. Then, with the coordinates (x/y) and sizes (width/height) of the element (div) I crop the screenshot. This works fine for me on non-retina displays. But not so on a Macbook with Retina display. For example, on www.247activemedia.com, we want to capture the header div with the logo (id="header"). On non-retina result is: On a Macbook with Retina display:

问题 I have been trying to figure out what I am doing wrong when calculation the position and size of the mask rectangle once the target image has been resized. Below is the documentation from fabric JS: clipPath :fabric.Object a fabricObject that, without stroke define a clipping area with their shape. filled in black the clipPath object gets used when the object has rendered, and the context is placed in the center of the object cacheCanvas. If you want 0,0 of a clipPath to align with an object

问题 Editing is not supported for this Image in Oreo Version problem. (Editing is not supported for this Image)this Toast showing when select the Image from gallery in Oreo Version mobile. I already asked this question but no one reply me. Please check my code and revert back as soon as possible. This is my code:- @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode != 0) { if (requestCode ==

问题 I need help to create perfect clear image after cropping transparent pixel from UIImage using swift 4. I want to create image with remove transparent color, So for that i have used below code. But it blur image with small small square rectangles appears. Using of below code let imageCroppedBg = imgWithClearBackgroung!.cropAlpha() //UIImage extension extension UIImage { func cropAlpha() -> UIImage { let cgImage = self.cgImage!; let width = cgImage.width let height = cgImage.height let

问题 I'm detecting markers on images captured by my iPad. Because of that I want to calculate translations and rotations between them, I want to change change perspective on images these image, so it would look like I'm capturing them directly above markers. Right now I'm using points2D.push_back(cv::Point2f(0, 0)); points2D.push_back(cv::Point2f(50, 0)); points2D.push_back(cv::Point2f(50, 50)); points2D.push_back(cv::Point2f(0, 50)); Mat perspectiveMat = cv::getPerspectiveTransform(points2D,

问题 I'm detecting markers on images captured by my iPad. Because of that I want to calculate translations and rotations between them, I want to change change perspective on images these image, so it would look like I'm capturing them directly above markers. Right now I'm using points2D.push_back(cv::Point2f(0, 0)); points2D.push_back(cv::Point2f(50, 0)); points2D.push_back(cv::Point2f(50, 50)); points2D.push_back(cv::Point2f(0, 50)); Mat perspectiveMat = cv::getPerspectiveTransform(points2D,

问题 I'm detecting markers on images captured by my iPad. Because of that I want to calculate translations and rotations between them, I want to change change perspective on images these image, so it would look like I'm capturing them directly above markers. Right now I'm using points2D.push_back(cv::Point2f(0, 0)); points2D.push_back(cv::Point2f(50, 0)); points2D.push_back(cv::Point2f(50, 50)); points2D.push_back(cv::Point2f(0, 50)); Mat perspectiveMat = cv::getPerspectiveTransform(points2D,

问题 My concern is how to fit image using android:scaleType="fitXY" into image using Glide . My ImageView is <ImageView android:id="@+id/img_pager" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:scaleType="fitXY" /> Loads image using Glide like this Glide.with(context).load(url).placeholder(R.drawable.default_image).into(img); but image is not getting fit into ImageView it show space on image either side as shown in screen I

问题 I have an A4 png image with some text in it, it's transparent, my question is, how can I crop the image to only have the text, I am aware of cropping in PIL, but if I set it to fixed values, it will not be able to crop another image that has that text in another place. So, how can I do it so it finds where the text, sticker, or any other thing is placed on that big and empty image, and crop it so the thing fits perfectly? Thanks in advance! 回答1: You can do this by extracting the alpha channel

问题 I need to create a surface that has a bounding circle. Anything drawn on that surface should not be visible outside that bounding circle. I've tried using masks, subsurfaces, srcalpha, etc., but nothing seems to work. My attempt: w = ss.get_width () h = ss.get_height () TRANSPARENT = (255, 255, 255, 0) OPAQUE = ( 0, 0, 0, 225) crop = pygame.Surface ((w, h), pygame.SRCALPHA, ss) crop.fill (TRANSPARENT) c = round (w / 2), round (h / 2) r = 1 pygame.gfxdraw. aacircle (crop, *c, r, OPAQUE) pygame