i am new to linux and qt.I am trying some tutorials.I wrote a simple t application to read jpeg image using QImage.But it is unable to load image.I have modified .pro file to QTPLUGIN += qjpeg LIBS += -ljpeg and when i try to add in file containing main function it gives compilation erors so i droped it and compiled and run the applicat...
How can I compose (adjoin) multiple JPEG files without re-compression? I know there is jpegtran that can losslessly crop and resize JPEG images, so I wonder if there is similar tool to adjoin images lossless? Their size is a multiple 1 MCU block (16 pixels in both directions). ...
When I try to print an image to STDOUT in a Perl CGI script, the image gets clipped when viewed in the browser. Here is the following code: if ($path =~ m/\.jpe?g$/i) { my $length = (stat($path))[7]; $| = 1; print "Content-type: image/jpg\r\n"; print "Content-length: $length\r\n\r\n"; open(IMAGE,"<$path"); binmode(IMAG...
The JPEG Images that ImageIO generated view correctly on windows file explorer, as well as safari webbrowser, but in FireFox, the resampled images are clipped. How do I use ImageIO without corrupting the resamples? The code should resize image keeping aspect ratio, as well as do jpeg compression, the convert it to a byte [] array, whic...
Hi, Pretty much as the title says, I've had a search around but been unable to find anything. I can read TIFF and JPEG files, but I've not found anything to read RAW files. Does anyone know of anything PHP or otherwise that can do this (if otherwise, then something I can use with PHP). Many thanks, Mike. ...
For some reason, when I load a JPG image at design-time, the image shows as a grey scale image with vertical bars reminiscent of TV scan lines. and the image is not sized properly. The image is 500x364 32 bpp, and previews beautifully. Is there a limitation of TImage in terms of colour depth? ...
What implementations are available for the JPEG-LS compression standard? JPEG-LS is the new (relatively speaking) lossless JPEG format based on the HP LOCO-I (LOw COmplexity LOssless COmpression for Images) algorithm. I am aware of the HP reference implementation which appears to no longer come with source code, and the following third-...
I am using a the standard PHP functions imagecopytruecolor and imagejpeg to rescale and produce uploaded images from a standard HTML form. The images appear at the correct size however the image filesize is quite high (e.g. 540px * 350px = 250kb) When compared to Photoshop's Save for Web using JPEG high quality settings the same files ...
I'd like to screen some jpegs for validity before I send them across the network for more extensive inspection. It is easy enough to check for a valid header and footer, but what is the smallest size (in bytes) a valid jpeg could be? ...
I am trying to save a JPEG image from a URL to a file with Java. URL: http://150.214.222.100//axis-cgi/mjpg/video.cgi?resolution=640x480&compression=1&duration=1&timeout=&dummy=garb I tried the following: 1) Image image = fetchImage(urlNorthView); saveImage2Disk(image); public static Image fetchImage( URL u ) throws ...
<Extension()> _ Public Sub Save(ByVal b As Bitmap, ByVal FileName As String, ByVal Compression As Long, ByVal MimeType As String) Dim Params As EncoderParameters = New EncoderParameters(2) Dim CodecInfo As ImageCodecInfo = GetEncoderInfo(MimeType) Params.Param(0) = New EncoderParameter(Encoder.RenderMethod, EncoderValue.Rend...
I've been looking around for a decent way of reading metadata (specifically, the date taken) from JPEG files in C#, and am coming up a little short. Existing information, as far as I can see, shows code like the following; BitmapMetadata bmd = (BitmapMetadata)frame.Metadata; string a1 = (string)bmd.GetQuery("/app1/ifd/exif:{uint=36867}"...
Hi there, I'm having problems converting a simple PNG into a JPEG format. I'm using the following code: ... File png = new File(filePath); try { SeekableStream s = new FileSeekableStream(png); PNGDecodeParam pngParams = new PNGDecodeParam(); ImageDecoder dec = ImageCodec.createImageDecoder("png", s, png...
I'm attempting to encode a large quantity of BufferedImages to JPEG using the ImageWriter class in javax.imageio. Unfortunately, the encoding operation is quite slow (about 80 to 250 ms per image, not including writing to disk.) This encoding stage ends up being the slowest part of my app, so I'm hoping to optimize it. Does anyone know ...
I've been seeking for JPG saving library for long time for c++, but i cant seem to get anything to work. Now i am trying use LibGD: What im doing wrong ? It seems to work, but the saving crashes. Code: ... #pragma comment(lib, "bgd.lib") #include <gd/gd.h> ... void save_test(){ gdImagePtr im; FILE *jpegout; int black; ...
Boost::GIL has almost perfect tutorial and manual. I find it troublesome to lack guide on building and using Boost::GIL work with PNG & JPEG IO. Does anyone have experience or have successfully did that? Please kindly advise! Thanks! EDIT: Answer lies here: http://opensource.adobe.com/wiki/display/gil/Downloads ...
I have a java applet that creates a JPEG file. I want to pass that file to a Javascript where it can display and print it. The only way I can think of doing this is to save the jpeg to a temporary storage area on the user's computer and then pass the path of the file to the javascript which picks it up and displays it. This raise...
I would like to create a server-side process that will capture html as an image and produce a jpeg. My process will be running on Linux / Mono and I am not sure that I can use the Webform Image Control in memory as suggested in Peter Bromberg's excellent article on EggHeadCafe. Is there an open source framework similar to ITextSharp th...
I called takePicture() and pass it a PictureCallback as a JpegPictureCallback. I'm seeing byte[] data input varies in size within onPictureTaken(). Can someone explain why this byte[]'s content size varies? I'm already setting picture size to a constant size with Camera.Parameters.setPictureSize(); Thanks! ...
I have a 2MB JPEG image, and when I use the option Image > Mode > Convert to colour Profile, the size get reduced to 50KB without to much quality loss. Could somebody explain why is the size so reduced? Am I missing some important point? ...