I have used {width=25px} for inline image but it seems not working with .svg image.
Is there any way that I can use this image in my rmarkdown?
You could use the R package rsvg to convert the SVG to PDF
rsvg::rsvg_pdf(svg = "https://upload.wikimedia.org/wikipedia/commons/1/15/Florida_in_United_States.svg",
file = "image.pdf")
and then include that PDF as you're used to
{width=25px}
You could also convert the SVG to another image format supported by knitr using the other rsvg::rsvg_* converter functions, e.g. to PNG via rsvg::rsvg_png(). But I'd recommend to stick with vector image formats like PDF or EPS since they will print in crisp sharpness.
Note that if you install rsvg from source (likely the case on Linux), additional system dependencies are required.
Enhancing in-house/internal software, that creates very basic PDF files, to handle images. Using JPEG seems to be the easiest place. Inserting JPEG image into Xobject stream by opening Image file and performing Reads from image file and Writes into PDF file. However, when viewing PDF file, getting errors on Image length. Appears PDF JPEG Image stream contents is not the exact same format as the Image file itself. I'm not using any PDF development tools to build the PDF file, just developing code myself to do this.
Does anyone know exactly how to add JPEG image file contents into Xobject stream? Appears to be or needs to be a conversion or something.
i am trying to load images from facebook. if a user has set a profile picture, then the picture is a jpg, however, if a user has not set one, then the picture is a stub image in gif format. i know that wp7 does not support displaying gif images (out of the box). is there any way to detect if the final picture is a gif or not?
for example, i make a BitmapImage like this:
BitmapImage img = new BitmapImage(new Uri("https://graph.facebook.com/userid1/picture"))
for this uri, the user does not have a profile picture. so i get taken to a stub gif image at https://fbcdn-profile-a.akamaihd.net/static-ak/rsrc.php/v1/yo/r/UlIqmHJn-SK.gif.
if a user does have an image, then i request it as follows.
BitmapImage img = new BitmapImage(new Uri("https://graph.facebook.com/userid2/picture"))
for the above url i get taken to a url like this: https://fbcdn-profile-a.akamaihd.net/hprofile-ak-snc4/000000_1621037713_00000000_q.jpg
my question is then, once i get the BitmapImage object, img, can i determine if this is a JPG or GIF? can i convert it to a JPG if it is a gif?
i looked at some related questions, but the API discussed loaded the image asynchronously, which is not what i wanted at the moment. furthermore, there was poor documentation.
any help is appreciated.
nevermind, i followed the instructions here: Display GIF in a WP7 application with Silverlight. the user gave an excellent walk through.
what you need to do before you do what this user suggested is to download the source code from codeplex.
then you need to download BitMiracle's JPEG library from http://bitmiracle.com/libjpeg/.
go ahead and go into the /src/ImageTools directory and open up ImageTools.Phone.sln. add the ImageTools.IO.Jpeg.Phone project to the solution.
when you build the solution it will complain about not finding BitMiracle's JPEG dll, go ahead and reference that DLL for the Jpeg project. build again, and it should work.
First download the image(any) using Httprequest or Webclient and then convert to jpg or png from gif(if it is gif) in the following way.
GifDecoder gd = new GifDecoder();
ImageTools.ExtendedImage img = new ImageTools.ExtendedImage();
gd.Decode(img, stream); //stream means image stream
PngEncoder png = new PngEncoder();
png.Encode(img, isoFileStreamdownload); //isoFileStreamdownload means stream, which is used to save image in image file like(image.png))
using ImageTools.dll, ImageTools.IO.Gif.dll,ImageTools.IO.Png.dll (Images Tools)
I think it helps to you
jpeg image
How is the above jpg image animated? As far as I know jpg format does not support animation.
No, the JPEG file format has no inherent support for animation.
The image you linked is actually an animated GIF disguised with a jpg file extension. (The browser apparently ignores even the MIME type and looks at the file header bytes in such cases.)
If you view the image in firefox, you can right-click on it and select properties:
You'll see Type: GIF image (animated, 54 frames)
Thus, it is a gif-image that has been renamed to .jpg.
For completeness, I'd like to point our that there's Motion-JPEG - sort of a jpg animation.
MJPEGs, usually produced by webcams, are a stream of JPEG files concatenated together, one after another, sometimes delimited by a HTTP header, and served by webcam-webservers with a MIME-Type of multipart/x-mixed-replace;boundary=, where boundary= defines the delimiter.
A search for animated JPEG related projects on github results in two findings:
In case people care about the size of an animated GIF, they strip it into separate JPG frames and tell the browser to exchange these frames in-place via some JavaScript code. For example. (Pawel's answer)
Then there's actually a proposed Animated JPEG standard, which stems from MJPEG and declares framerate and so forth in each JPG frame. Not probable to arrive in browsers anytime soon.
And lastly, I've seen image-hosters to replace large animated GIFs with a mp4 version of the GIF for presentation, plus some Javascript to serve the actual GIF for downloads/non-supported browsers.
And no, JPEG itself, via JFIF, does not offer a facility to animate a JPG file in itself, just as Noldorin already noted in the chosen answer. :shrug:
It is a GIF image... the extension has been changed by hand. Browser engine is smart enough to determine image format regardless of file extension.
var c = 1;
/* Preloading images */
var image1 = new Image();
image1.src = "a1.jpg";
var image2 = new Image();
image2.src = "a2.jpg";
var image3 = new Image();
image3.src = "a3.jpg";
var image4 = new Image();
image4.src = "a4.jpg";
var image5 = new Image();
image5.src = "a5.jpg";
function disp_img(w)
{
if (c == 6)
{
c = 1;
}
var img_src = "a" + c + ".jpg";
document.ani.src = img_src;
c++;
}
t = setInterval("disp_img(c)", 1000);
No JPEG doesn't support animation. Saving a GIF file with .jpeg extension doesn't male it a JPEG file. It's still a GIF file. Because OS Image viewer doesn't look into file extension it rather looks into the content.
If you open that file as binary (in a text editor) you will see the first line contains
GIF89ad�d�˜|� Which is the magic number for GIF.
Yes,
you can make animation using single jpeg. Google "jpeg css sprites". Of course this will not be native animation support by jpeg format.
A bit of a necro-post but since this question popped first when I tried to get info about pixel motion jpeg, here's some additional info.
Since Pixel2, Google created motion jpeg, which is an ordinary jpeg at the end of which there's an mp4 video.
More on this here:
https://android.jlelse.eu/working-with-motion-photos-da0aa49b50c
JPG does not animate. You either saw a series of JPG images rendered with javascript or you saw a GIF file named as a JPG. A web server and browser might still recognize the correct GIF filetype, even if the wrong extension has been added to the filename.
If you open the image file and if it is a sort of GIF format by using a hex editor, you see the following 4 bytes designating that image type is of GIF.
I have unpickled an image, and utilizing PIL when I use img.show() I can see the image in external viewer properly but when I try to save it using img.save() it is plagued by horizontal color artifacts. As img.show() is using bmp to temporarily save and show the file, I tried using img.save(filepath, "bmp") as well as other file formats. Other formats, such as jpg and png, totally corrupt the image, while bmp creates color artifacts. I checked the documentation for PIL but it was not helpful. What method can I use to save the image I see properly?
After many tries, it turns out instead of:
with open("img.bmp", 'w') as f:
image.save(f)
opening the file with the binary attribute "b" added solves the issue. Like this:
with open("img.bmp", 'wb') as f:
image.save(f)