jpeg

问题 I have a file of raw data , its a image data. Now i need to convert the Raw data to JPEG image in Objective-C. STEPS: 1) Read the file containing the raw data into NSString. 2) Encode the string to JPEG encoder 3) Create an JPEG image Can you please guide me how to achieve this? Is there any library available in iPhone OS to encode into JPEG. 回答1: This is how you create a UIImage from JPEG data: UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfFile:…]]; And this is how you

问题 I have a webview that loads a webpage and sometimes in this webpage there are pictures. However, i have encountered 2 instances where the image does not load and they each give different outcome. Outcome #1 : Webpage is loaded but image is not loaded (Format used : .jpeg) Outcome #2 : Webpage is loaded but image is not loaded. However, at where the image should be, there is a icon with a question mark. (Format used : .jpg) I have other webpages that have images of the same format and from the

问题 I want to crop an image to a specified pixel region. I'd like to use the gm module from https://github.com/aheckmann/gm. I am running Linux Mint 13 and node.js v0.9.4pre. I am running into an error that sounds like graphicsmagick doesn't know about jpegs: Error: Command failed: gm convert: No decode delegate for this image format (./assets/images/temp/2aadd4379e1cf2b59429994270db2a8a.jpg) Sure enough, gm convert -list formats shows no jpeg delegate: <snip> IPTC P rw- IPTC Newsphoto IPTCTEXT P

问题 I am trying to send a picture from an Excel sheet, but the size is very small. How could I get a decent size (basically the whole screen)? Here is the code: Sub send_as_a_pic() 'Copy range of interest Dim r As Range Set r = Range("B2:O23") r.Copy 'Open a new mail item Dim outlookApp As Outlook.Application Set outlookApp = CreateObject("Outlook.Application") Dim outMail As Outlook.MailItem Set outMail = outlookApp.CreateItem(olMailItem) With outMail .To = "fernando.grespan@fernando.com" .CC =

问题 I am trying to decode a lossless jpeg using JAI_ImageIO library and the following java call: ImageIO.getImageReadersByFormatName("jpeg-lossless").hasNext() results in "null". NOTE: I have the JAI_ImageIO jar installed to my jre/lib/ext directory. I don't know if the JPEG reader is sufficient to read lossless jpegs or if another reader is required to be installed. When I enumerate the FormatNames, i.e.: ImageIO.getReaderFormatNames() I get the following formats: [raw, jpeg, tif, WBMP, PNM, JPG

问题 I have been working on my image upload website. I am trying to take pictures from my IPhone and upload them to my web server. My files are uploading fine, However the problem i am running into is all of my images rotate 90 degrees to the left. My Image upload process $imageObject = imagecreatefromjpeg($_FILES["fileToUpload"]["tmp_name"]); imagejpeg($imageObject, $target_file, 75); Creating a new image and uploading it to my web directory. I create a new image to remove all of the EXIF Data

问题 How to solve this bug: When i trying to load a JPG file (png, bmp, .. all is fine), then i see in console this error Wrong JPEG library version: library is 80, caller expects 70 and my JPG file is not loading. I am using libjpeg 7.0 version and error come in image decode function at code line: jpeg_create_decompress(&cinfo); But , in example project is all fine. So interesting 回答1: Solved. I removed a project file and was create a new XCode project file and add him a resources and sources.

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I have a hundred image that are in TIFF format, I want to convert them to JPEG format. I use the R language. could you please tell me what function or what package should I use to make this conversion in r. Thank you in advance. 回答1: An indirect way to convert tiff to jpeg image

问题 I need display a jpeg picture, and convert it to YUV420SP. First I use SkBitmap to parse jpeg and display it, then I use the code below to convert RGB565 to YUV420SP on android, but it spend 75ms to convert a 640*480 RGB565 picture, so anybody know the faster way to convert RGB565 to YUV420SP on android? or faster way to convert jpeg file to YUV420SP on android? // Convert from RGB to YUV420 int RGB2YUV_YR[256], RGB2YUV_YG[256], RGB2YUV_YB[256]; int RGB2YUV_UR[256], RGB2YUV_UG[256], RGB2YUV

问题 I downloaded some code that make use of libjpeg, but no dlls in the source files are included, and I'm trying to make it compile / execute correctly. I am using VS2010: in my source files I have #include "jpeglib.h" and in Linker > Input > Additional Dependencies I have jpeg.lib , both of which can't be found on my computer. I managed to go here : http://gnuwin32.sourceforge.net/packages/jpeg.htm and downloaded the "developer files" archives, which indeed contains the header and the .lib file