Uiimage Scale

Scale and Rotate an image in iOS / MonoTouch, using the EXIF data - scale. Here's a category UIImage+Scale for those who needs one. MATLAB ® calls the uifigure function to create the new figure. Before we go into the scenarios / situations of image handling in Application, let us understand the concept of UIImage and UIImageView. As the name suggests, it allows developers to filter images in their apps. TranslateTo(VisualElement, Double, Double, UInt32, Easing) Animates an elements TranslationX and TranslationY properties from their current values to the new values. ContentMode. Posts about UIBarButtonItem written by AlexHedley. If the value specified is zero, the device's scale factor is used. NET with the native APIs of Mac, iOS, tvOS, and watchOS. I've tried to google around for a c# sample that could explain how to resize image files to thumbnails (thus keeping aspect ratio). for that we need to find out scale factor of phone. IOS: UIImage scale to fill inside a UIView I am subclassing UIView, retrieving a remote image then drawing it to the view using drawRect. All other images are assumed to have a scale factor of 1. The Secret of Storing and Loading UIImage(s) The solution couldn't be any simpler: load the stored image with a scale based on the current device screen render factor. Scaling images using scale-to-fit Both content-width and content-height properties can have a special value scale-to-fit which allows you to automatically scale down images which are wider or taller then necessary. This is very easy without a navigation bar, but with one it’s a bit more involved so I thought a blog post would be in order. Image Handling in iOS on InnovationM Blog | When we use images in our application then we face different type of scenarios while handling the image. If you load an image from a file whose name includes the @2x modifier, the scale is set to 2. For ages I’ve had xc bound to open *. So a scale of 2 will mean that the image is half of its original size. - UIImage+Scale. Along with powerful image filtering capabilities, Core Image includes APIs for face detection, automatic image enhancements, and custom effects through "chained" filters. # UIImage, CGImageの面倒なとこ 色々面倒なので拡張を作っています。 以下のサンプル、相互に参照しているのでメソッド足りなければ記事から探してください。 # CGImage, CIImage変換 UIImage. And in the vast majority of cases,. You can create images from files, from Quartz image objects, or from raw image data you receive. public UIImage Scale (CGSize newSize, nfloat scaleFactor). If you find this tips useful, just drop a line below and share the link to others and who knows they might find it useful too. So, the following code may get the "rotate and scale while maintaining aspect ratio" functionality you're looking for. It extends the UIImage class to support scaling. scale The scale factor to apply to the bitmap. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Otherwise the scale defaults to 1. The Image view provides a way to initialize it using UIKit's UIImage. i haven't tried this with beta 6 yet, but as of beta 5, the image came out funny if you took the picture in "portrait" mode. Image resize function in swift as below. I think I know what's going on. Those objects are seen from the camera and can be defines to stay in a certain position relatively to the…. The scaling behavior of SVG image files may vary based on how the file is defined. The UIView. When I make a big content in scrollView and then put sprite into UIImage it isn't look good when I load png with small height (big white space on top of the sprite). 0; Set this up when you create the cell (make sure you `#import ` at the top, of course). Does scale. Generate a UIImage from an SF symbol. Applying a different scale factor changes the size of the image as reported by the size property. scale Aspect Fill, or. And in the vast majority of cases,. Resizing UIImage on iOS. UIImage(CIImage) Creates a new UIImage from the provided Core Image image. ImageMagick-style. You can also specify an explicit scale factor when initializing an image from a Core Graphics image. png, UIImage. A protip by mrballoon about cocoa, ios, mac, scale, uiimage, xcode, and objective-c. Scaling images and creating thumbnails from UIViews Posted on October 1, 2010 by Alexander In this blog post I would like to show how you can do some common image-related tasks, like scaling an UIImage object or creating a thumbnail image from a UIView. How to check whether a UIImage is black and white How to convert a UIImage to Black and White? How to pop up the UIImagePickerController in an ip How to convert a UIImage to Grayscale? How to re size a UIImage with given height and wid May (6) April (5) January (19) 2012 (19). im = uiimage creates an image component in a new figure and returns the Image object. UImageFromPathScaledToSize. Please join us on Visual Studio Developer Community and in the Xamarin and Mono organizations on GitHub to continue tracking issues. Now, if I get the pngData from the UIImage, the size of the image seems to be larger and the dimension is off. However, it is the best practice to use the same sizes images, but imageview can scale the images to fit all or some of the available spaces. size let widthRatio = targetSize. 0 makes the image 1/2 the size. To hold the image, UIImageView is required. If you've tried enlarging in Photoshop, the first thing is to experiment with the resampling algorithm (photoshop suggests bicubic smoother as the best for enlarging, but I have found it to be image dependent (if you have an image with a lot of edges vs a portrait or landscape). I got pretty far on my own, and then a guy on Stack Overflow jumped in with some really, really helpful advice, but he seems to be tied up and hasn't been able to help me solve the last bit. Applying Scale Factor in UIimage in iOS Scale Factor In iOS we have to set the images on different kind of devices such as iPhone 4, 5,6 etc. I tried multiplying the image's size by the scale of the screen, but that isn't coming out as expected either. CIImage doesn't support scaled resolutions (1x/2x), so when UIImage(named:) pulls the 2x asset, the scale information is lost in the conversion to CIImage. OK, I Understand. png and [email protected], and I use the following code to create the background image for a button:. Erica Sadun posted a Swift rewrite challenge, and the chosen function is to scale and crop an image. Watch Queue Queue. And in the vast majority of cases,. 「ios入門」nsdataからnsdictionaryへ変換(ネットワーク同期get方法を利用) コード下記: - (void)getjsonfordata uiimage图片处理 - bbsmax. 0 makes the image 1/2 the size. I've tried to google around for a c# sample that could explain how to resize image files to thumbnails (thus keeping aspect ratio). 1、UIImage to RGBA8 bitmap 2、RGBA8 to UIImage 3、RGBA8 bitmap to a UIImage. You can create linear gradient images (with two colors or more) using the following methods:. What you can do is a class giving you back hardware info such as this one, and depending on the aspect ratio modify the file name you pass in the "FromFile" method. XSL FO Recommendation, Chapter 7. Scale factor to apply to the scaled image. It happened on a call to [UIImage imageNamed:]. You'll also probably need to make sure your scale resolution on the canvas is correct. Does scale. But for the image, where you see that thing that looks like a target, change it to stretch with height and width. Image Buffers In-memory representation of an image Each element describes color of a single pixel Buffer size is proportional to image size. I live 20 miles at 65mph outside New York. A protip by mrballoon about cocoa, ios, mac, scale, uiimage, xcode, and objective-c. Join GitHub today. UIImage scale using vImage. Download, Create and Display an Image from URL This tip will show the steps to download and display an image from a remote resource. Features that historically would have required mathematicians, statisticians, and machine learning experts, as well as a huge amount of annotated data, can now be implemented by any developer, as we saw above. so heres a simple ruby script to open the Xcode project, either within the current working directory or within any of it’s parent directories. really, you should be able to just set the imageView's image to the orignially passed in image and it should rotate and scale for you. create image component - matlab uiimage - mathworks france. 0 in the option, so that you. The scale factor to assume when interpreting the image data. When you pinch the view, you will be able to scroll it up and down to its maximum and minimum scale factors. ScaledToSizeFilter - Scales an image to a specified size. @interfaceImageHelper : NSObject {} /** Convertsa UIImage to RGBA8 bitmap. 0, this method first searches for an image file with the same filename with an @2x suffix appended to it. each phone has high scale factor due to that reason images , display in sharp and clear. Finally, it creates a UIImage from the cropped bitmap with the class factory and passes the bitmap along with a scale factor of 1. I didn't want to draw the sphere algorithmically; I wanted the picture of a sphere to be based on an image, but then colored. 32、UIImage+Scale缩放图片UIImage可以加载图片,但是我们想要得到一张缩小或放大的图片,利用UIImage不能做到,下面我们添加. uiimageview. Use uiimage to display a picture, icon, or logo in your app. FromImage(CGImage, nfloat, UIImageOrientation) Static factory method to create a UIImage backed by the specified , scaled and oriented as specified. # はじめに UIImageをリサイズしたいと思い、とりあえず「UIImage resize」とググってみたのですが、サンプルコードを動作させると思わぬ落とし穴にハマったので、備忘録として書き残しておきます。 # 画像が粗くなる(画. For ages I’ve had xc bound to open *. (The question was edited in 2015. This is very easy without a navigation bar, but with one it’s a bit more involved so I thought a blog post would be in order. UIImage, resolution independence and the iPhone 4's Retina display By Michael Tyson | Published: June 26, 2010 iOS4 caters for the high-resolution Retina display that comes with the iPhone 4 by some rather clever abstraction, that moves away from the concept of 'pixels', and instead uses 'points', which are resolution-independent. It seems it always gets the previous image instead of the current one. The width and height values being reported from it's size property, are equal to pixel values reported via CGImageGetWidth CGImageGetHeight functions on the CGImageRef used to create the UIImage. 1、UIImage to RGBA8 bitmap 2、RGBA8 to UIImage 3、RGBA8 bitmap to a UIImage. If you specify a value of 0. The available initializers for a UIImage Symbol Configuration It allows you to set the font, scale, point size, weight, and text style. So you can easily create a UIImageView subclass which will scale the image UP if needed, if the default UIImageView doesn't do so. OK, I Understand. Photos returned by the photos service come from a variety of sources, including business owners and user-contributed photos. The complete description of the distance. If you just want an UIImage smaller and don't care about exact sizing, this category is for you. UImageFromPathScaledToSize. I want the pixels of the UIImage to actually shift position. Along with powerful image filtering capabilities, Core Image includes APIs for face detection, automatic image enhancements, and custom effects through "chained" filters. I would like to upload a profile picture to Firebase when my UIImage picker has been chosen. It’s a safe, fast, and interactive programming language that combines the best in modern language thinking with wisdom from the wider Apple engineering culture and the diverse contributions from its open-source community. UIImage can be scaled drawInRect: will scale the image for you, if you're controlling all the drawing yourself. Join GitHub today. This video is unavailable. This is handy if you need to add an image as a subview, yet, the image is not part of your application bundle. The scale factor to use when interpreting the image data. Use uiimage to display a picture, icon, or logo in your app. This will scale all three of the image node’s axes by the same value. UIImage converted to Data then back to UIImage afterwards getting flipped across the x-axis for some reason. (The question was edited in 2015. Do not specify any rotation metadata—the default value,. What I'm trying to achieve is to get automated polygon collider points for my UIImage, but since it automatically generates the points only for Sprites, I get the points generated for the Sprite, scale them to fit my UImage sizes, and set them to my UIImage collider points. Given a path to an image and a specified size, create a UIImage object and get the scale value based on the current image size and the size to scale to, and finish by creating a new UIImage object from the original image, scaled as requested. If it finds a 2x, it loads that image and sets the scale property of the returned UIImage object to 2. resize scale size UIImage. There is some support for orientations (not mirrored still). 1) paint image that we are going to use as brush in appropriate color and scale it 2) draw this image along the path we created in 1st part Create extension of UIImage class. 32、UIImage+Scale缩放图片UIImage可以加载图片,但是我们想要得到一张缩小或放大的图片,利用UIImage不能做到,下面我们添加一个UIImage的分类,用来实现UIImage中图片. Thanks for the tutorial. Try using the UIImage. 0 results in an image whose size matches the pixel-based dimensions of the image. This post shows an example of one way to crop an image. Render UIView to UIImage Posted on February 11, 2012 by Yonat Sharon There’s a simple way to render a UIView into a UIImage: use the view’s layer , and render it into a bitmap graphic context. When you pinch the view, you will be able to scroll it up and down to its maximum and minimum scale factors. x you have to use:. The simplest way to resize an UIImage? Ask Question Asked 9 years, 8 months ago. rectangle) on UI Image (e. The UIView. // MARK: - Image Scaling. You use image objects to represent image data of all kinds, and the UIImage class is capable of managing data for all image formats supported by the underlying platform. Removed #def UIKIT_REMOVE_ZERO_FROM_SWIFT. It's possible you'll need to think about the scale of the result image. This ensures that the input layout is in the same position as the visual. up) Опубликовано 3rd April 2017 пользователем Unknown Ярлыки: cgImage extension fix fixOrientation iOS Orientation swift swift 3 UIImage. If you just want an UIImage smaller and don't care about exact sizing, this category is for you. This article covers including an image asset in a Xamarin. I've got some code that resizes an image so I can get a scaled chunk of the center of the image - I use this to take a UIImage and return a small, square representation of an image, similar to what's seen in the album view of the Photos app. It's possible you'll need to think about the scale of the result image. Note that, although being a "Get" function, the returned image actually has retain count of +1, and the caller (you) are responsible to CGImageRelease it. What you can do is a class giving you back hardware info such as this one, and depending on the aspect ratio modify the file name you pass in the "FromFile" method. Removed #def UIKIT_REMOVE_ZERO_FROM_SWIFT. UIImage Resize/Scaling. // grab the original image UIImage *originalImage = [UIImage imageNamed:@"myImage. To resize UIImage object, I used imageWithCGImage:scale:orientation method. UIImage(NSData) Creates a new UIImage from the provided image data. scaleAspectFill modes scale the image to fit or fill the space while maintaining the image's original aspect ratio. UIImage can be scaled drawInRect: will scale the image for you, if you're controlling all the drawing yourself. The width and height values being reported from it's size property, are equal to pixel values reported via CGImageGetWidth CGImageGetHeight functions on the CGImageRef used to create the UIImage. Here's a category UIImage+Scale for those who needs one. You can rate examples to help us improve the quality of examples. UImageFromPathScaledToSize. I used this single line of code to create a new UIImage which is scaled. Does scale. 0 and the source's orientation. I create a picture programmatically convert it to data and back and get different pictures let image1 UIImage let size CGSizewidth 50 height 50 let rect CGRectx 0 y 0. 32、UIImage+Scale缩放图片UIImage可以加载图片,但是我们想要得到一张缩小或放大的图片,利用UIImage不能做到,下面我们添加. Similarly an image with a @3x modifier has a scale of 3. Should it match the screen scale (usually 2 or 3), or should it just be 1? if instead of a UIImage you actually want a PNG or JPEG image, then UIGraphicsImageRenderer provides other methods for getting that. UIImage(CIImage) Creates a new UIImage from the provided Core Image image. I have been searching for an answer to this question in a few hours now, and I just can't figure it out. There is no support for scale (do we need it?), so please define pixel values. var image = UIImage(CGImage: otherImage. Well, that says it all, turns out that with images loaded with imageNamed: you have to mind the scale property of the image, if you'd like to have the real. For standard resolution images, it sets the scale property to 1. Introduction. Convert to YUV from webcam formats for compression. Here's a category UIImage+Scale for those who needs one. It’s a safe, fast, and interactive programming language that combines the best in modern language thinking with wisdom from the wider Apple engineering culture and the diverse contributions from its open-source community. Use uiimage to display a picture, icon, or logo in your app. I am an Interactive Developer and I spend most of my life in front of a monitor. How to convert a UIImage to Grayscale? Please do follow this post along with the post here Note that I have already shown you the coding on how to pick an image from the UIImagePickerViewController and display it in the UIImageView we have in the screen. I don't know how to scale content size to fit my png size. What am I doing wrong? Edit: Also, how does one get the actual dimension of the image. We'll build a simple demo app together. - xamarin/xamarin-macios. This object is built with a Rectangle, and is associated with a paintbox. This article wants to introduce a Resizable graphical Rectangle (UserRect) which can be resized and moved. png as their sprites. Yes, that sentence is pure nonsense. 先想一个问题"一个图像的尺寸到底是多大呢?" 第一反应可能就是image. xcodeproj but that only works within the root directory of a project. I definitely recommend to you use UIImage category for this. If you're only worried about fitting the aspect ratio, you can just set the imageView to scale the image to Aspect Fill or Aspect. Note that, although being a "Get" function, the returned image actually has retain count of +1, and the caller (you) are responsible to CGImageRelease it. Home » Ios » Resize UIImage by keeping Aspect ratio and width. When I make a big content in scrollView and then put sprite into UIImage it isn't look good when I load png with small height (big white space on top of the sprite). Basic three of the gestures which we are going to discuss,. Returns a task that scales the VisualElement that is specified by view to the absolute scale factor scale. Rotate a UIImage by 90 degree angles I was looking for an easy way to rotate an image by 90 degrees and all the methods I used lots of code & required redrawing the image, normally with a transform, then getting the image from that. After the processing we need to convert it back to UIImage. I'm having two problems with UIImage. each phone has high scale factor due to that reason images , display in sharp and clear. For example, I want to show spheres of different colors on a map; there are 360,000 spheres, each having its own color. A protip by zwaldowski about ios, objective-c, coregraphics, and quartz. UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL. func resizeImage(image: UIImage, targetSize: CGSize) -> UIImage { let size = image. Who likes this? 4. uiimage的scale坑 - 长电风扇. A protip by mrballoon about cocoa, ios, mac, scale, uiimage, xcode, and objective-c. I need to scale down an image, but in a sharp way. Note that this is a CGImage, so you need to convert it to a UIImage with +[UIImage imageWithCGImage:]. Optimized for Neon on Arm. If you scale an image to 240x240px, then save it to disk, and reload it, you suddenly have an image of 480x480px. I'm talking about the UIImage that is created. Watch Queue Queue. Image Buffers In-memory representation of an image Each element describes color of a single pixel Buffer size is proportional to image size. You can also specify an explicit scale factor when initializing an image from a Core Graphics image. UIImage converted to Data then back to UIImage afterwards getting flipped across the x-axis for some reason. cornerRadius = 5. A protip by zwaldowski about ios, objective-c, coregraphics, and quartz. Additional UIImage methods let you scale an image into a desired rectangle as you draw, and specify the compositing (blend) mode whereby the image should combine with whatever is already present. Photos returned by the photos service come from a variety of sources, including business owners and user-contributed photos. If the screen has a scale of 2. The available initializers for a UIImage Symbol Configuration It allows you to set the font, scale, point size, weight, and text style. Basically I will show image and put circle / rectangle on image showing area in blue print and save it. The first problem is that the Scale method isn't using the @2x image for retina displays. Editor’s Note: Part 2 of this post Resize/Scale of an Image – Take 2 – Thread Safe Approach takes this idea to the next level, showing how to dynamically resize images using thread safe code. code snippets. Scaling down UIImage and keep it sharp I'm using the answer from this question to scale down an image and make it not blurry. Optimized for SSSE3/AVX2 on x86/x64. below is my code getting UIImage using your getUIImage(). For example, I want to show spheres of different colors on a map; there are 360,000 spheres, each having its own color. I've tried to google around for a c# sample that could explain how to resize image files to thumbnails (thus keeping aspect ratio). Stanford CS193p Developing Applications for iPhone 4, iPod Touch, & iPad Fall 2010 Stanford CS193p Fall 2010. im = uiimage creates an image component in a new figure and returns the Image object. How to convert a UIImage to Black and White? Please do follow this post along with the post here //this button click even twill call the convertToBlackNWhite() method to sart the color conversion to black and white. Scaling images and creating thumbnails from UIViews Posted on October 1, 2010 by Alexander In this blog post I would like to show how you can do some common image-related tasks, like scaling an UIImage object or creating a thumbnail image from a UIView. Scales the image up or down. OK, I Understand. 0) for the maximumZoomScale, thus you can scale up the image to 4 times its size, which isn’t so good as the resulting image when scaled up to a size larger than the original will be blurry. scale To Fill provides exactly the behavior you need. You use image objects to represent image data of all kinds, and the UIImage class is capable of managing data for all image formats supported by the underlying platform. UIImage scale using vImage. Depending. Watch Queue Queue. Howvere I ran into objective-c-only code snippets which are not clear to me. resize scale size UIImage. So you can easily create a UIImageView subclass which will scale the image UP if needed, if the default UIImageView doesn't do so. Use uiimage to display a picture, icon, or logo in your app. Otherwise your images will get displayed double sized. OK, I Understand. There is some support for orientations (not mirrored still). If the value specified is zero, the device's scale factor is used. If the screen has a scale of 2. iOS supports high resolution displays via the scale property on UIScreen, UIView, UIImage, and CALayer classes. Join GitHub today. I would like to upload a profile picture to Firebase when my UIImage picker has been chosen. Does scale. Here's how we display, color and scale a built-in image:. C# (CSharp) UIKit UIImage. So i found a solution for this. 0 results in an image whose size matches the pixel-based dimensions of the image. Stanford CS193p Developing Applications for iPhone 4, iPod Touch, & iPad Fall 2010 Stanford CS193p Fall 2010. Note that this is a CGImage, so you need to convert it to a UIImage with +[UIImage imageWithCGImage:]. In our app the background image was just a gradient, so we didn't care much. size=32*32 (不存在@2x文件的时候) 看出来没有,图片的实际尺寸是size*scale。这里就可以给出UIImage的scale含义: sacle = 实际大小 / 当前逻辑大小 当前逻辑大小 = 实际大小 / sacle 当前逻辑大小 = 实际大小 * (1/sacle. For example, I want to show spheres of different colors on a map; there are 360,000 spheres, each having its own color. I haven't tested this on non-retina devices, but this probably means that if I want the same image-size on both retina and non-retina devices, I have to check to see which one I'm currently on before I decide which size I want to. MATLAB ® calls the uifigure function to create the new figure. The first problem is that the Scale method isn't using the @2x image for retina displays. Image resize function in swift as below. 「ios入門」nsdataからnsdictionaryへ変換(ネットワーク同期get方法を利用) コード下記: - (void)getjsonfordata uiimage图片处理 - bbsmax. C# (CSharp) UIKit UIImage. Each filter is implemented as an extension to UIImage so they can be used to populate UIImageView objects. UIImage, resolution independence and the iPhone 4's Retina display By Michael Tyson | Published: June 26, 2010 iOS4 caters for the high-resolution Retina display that comes with the iPhone 4 by some rather clever abstraction, that moves away from the concept of 'pixels', and instead uses 'points', which are resolution-independent. ethan September 30, 2019 at 10:44 am. Augmented reality makes user experience objects appearance in 2D or 3D in the real world. OK, I Understand. Bridges the worlds of. 0 //will cause round corner not clear == blur let scale:CGFloat = 0. Edited 8/24/11: Fixed a bug with alpha transparency not being preserved. You'll also probably need to make sure your scale resolution on the canvas is correct. Thanks for the code everyone! Here is a Swift 3 version. I think that when you draw an image into a new graphics context and then create a fresh UIImage from that context, it removes the orientation information by default. The code for working with the queued operations (queuedOp) we will look into in a future post. You either create or apply a new transform using one of the "make" functions:. Desarrollo una aplicación en la que proceso la imagen utilizando sus píxeles, pero en ese proceso de imagen lleva mucho tiempo. If you've tried enlarging in Photoshop, the first thing is to experiment with the resampling algorithm (photoshop suggests bicubic smoother as the best for enlarging, but I have found it to be image dependent (if you have an image with a lot of edges vs a portrait or landscape). Image objects are immutable, so you always create them from existing image data, such as an image file on disk or programmatically created image d. Image Buffers In-memory representation of an image Each element describes color of a single pixel Buffer size is proportional to image size. Note that, although being a "Get" function, the returned image actually has retain count of +1, and the caller (you) are responsible to CGImageRelease it. FromImage(CGImage, nfloat, UIImageOrientation) Static factory method to create a UIImage backed by the specified , scaled and oriented as specified. 「ios入門」nsdataからnsdictionaryへ変換(ネットワーク同期get方法を利用) コード下記: - (void)getjsonfordata uiimage图片处理 - bbsmax. x you have to use:. Join GitHub today. Scales the image up or down. If the screen has a scale of 2. CGImage image为原始图片 参数2:scale 原始图片放大倍数. After the processing we need to convert it back to UIImage. OK, I Understand. The crash occurred on an iPad 4 running iOS 8. I mean it is really simple to generate QR code in Swift 3. com is now in read-only mode. Creates a new UIImage from the provided image data. UImageFromPathScaledToSize. Here is my function for when a picture has. Before we go into the scenarios / situations of image handling in Application, let us understand the concept of UIImage and UIImageView. Here is a complete code sample that I've used in my projects. ImageMagick-style. Image size & Resolution – 72dpi or 300dpi. code snippets. I think I know what's going on. It is best to specify images whose dimensions match the dimensions of the image view exactly, but image views can scale your images to fit all or some of the available space. I looked into EdgeInsets but couldn't get them to work with the image. // Move the origin to the middle of the image so we will rotate and scale around the center. Concept of…. Otherwise the scale defaults to 1. AlamofireImage. In my app, there is a registration-page, where the user can register to have access to more functions. The code for working with the queued operations (queuedOp) we will look into in a future post. Resizing UIImage on iOS. Thanks for your article on UIImage from UIView. scale Aspect Fit,. I got pretty far on my own, and then a guy on Stack Overflow jumped in with some really, really helpful advice, but he seems to be tied up and hasn't been able to help me solve the last bit. If the value specified is zero, the device's scale factor is used. Here's a relatively easy way to achieve rounded corners on the standard image view in a UITableViewCell: cell. return UIImage (cgImage: self. Should it match the screen scale (usually 2 or 3), or should it just be 1? if instead of a UIImage you actually want a PNG or JPEG image, then UIGraphicsImageRenderer provides other methods for getting that.