for the reportlab library there is a module utils.py, and within this module a class class ImageReader(object): I was expecting to use this class to get RGB style data of integers between 0 and 255 but instead my code returns the following (1718461541,) for each print line below import struct filename = "pakistan.jpg" imageObj = u...
I want to replace the JPG preview image in a my camera's RAW files with the camera's JPG (I shoot JPG + RAW). I'm using a Panasonic GH1, so the RAW format is RW2. After having finally figured how the RW2 file is organized, I noticed that exiftool can do exactly what I want. However, I noticed that the JPG preview image embedded in an RW...
Hi, does anyone know how i can convert a tjp (tiled jpeg file) to another fileformat as jpeg, png, etc.? It would be great if i can convert them in batch, because i have lots of these files. kind regards, Daan ...
Hi, I have 2 PDFs of the same Japanese text. One encoded in Shift-JIS another is Unicode. PDFs look exactly the same to me. I convert both of this PDFs to JPEG images of the same resolution and I get JPEGs of different bite size. Can anyone think of the reason why the size is different? Thanks ...
I need an image 1px X 1px or empty Jpeg image using c# ...
Using libjpeg, if possible, I would like to read a row from the middle of a JPEG image without reading all the preceding rows. Can this be done? ...
i have several jpeg images and i want to combine them into one big jpeg image. i can do that by creating a Bitmap and then combining them there but that way if i save it again as jpeg the image will deteriorate. so is there any method that i can do that without losing quality from decoding/encoding? in acdsee program i saw an option to r...
i want to read the raw image data of a jpeg so i can manipulate it without loosing any quality when doing so. i took a look at the LibJpeg.Net library http://bitmiracle.com/libjpeg . but there is a lot of code and couldnt find anything about reading/writing raw blocks. mainly i want to implement lossless editing of a jpeg image and was w...
Hello, I am wondering whether anyone knows a easy way to convert a latex math formula to a big jpeg file? Here is the latex math formula: \[ \lim_{u\rightarrow 0_+} \int_0^u \ud s \int_{-\infty}^\infty \frac{f(u-s,x-y)}{\sqrt{2\pi s}} \exp\left\{-\frac{y^2}{2s}\right\} \ud y \] Thanks! ...
We have to compress a ton o' (monochrome) image data and move it quickly. If one were to just use the parallelizeable stages of jpeg compression (DCT and run length encoding of the quantized results) and run it on a GPU so each block is compressed in parallel I am hoping that would be very fast and still yeild a very significant compress...
Are there any php libraries for this to re-scale or re-size photos down to whatever limit we set for height/width/size and also if users upload photos in gif png, or bmp then convert them to jpeg? ...
Hello, I'm writing a application, which retrieve rtsp stream from camera then do multicast streaming, at one point I need jpeg streaming in case camera connection is unsuccesfull. My command line arguments is : CODE: SELECT ALL string[] args = new string[] { "-I", "dummy", "--ignore-config", ...
Hello! Is there any fast way to determine if some arbitrary image file is a png file or a jpeg file or none of them? I'm pretty sure there is some way and these files probably have some sort of their own signatures and there should be some way to distinguish them. If possible, could you also provide the names of the corresponding rout...
I'm trying to resize some images using PHP and Imagick, however when I do so I get this error: ImagickException: Wrong JPEG library version: library is 80, caller expects 62 There's very little on internet about the problem, although there are a few questions on stackoverflow about it. I can't see any solutions posted to any though. D...
Hello all We have a custom video camera that streams what is essentially jpeg images to our software at 12fps. What I would like to do is display this "video" on a web page with as minimal effort as possible. My current thinking is to write the images out and have the web page collect them, buffer up a few seconds worth then essential...
I'm working with someone else's code on a device which can put an image to /dev/fb/0 and show up on video out or send it over the network to a client application. I don't have access to the old source for the client app, but I know the following about the data: 720x480 16-bit RGB (I'm no sure if it's 5,5,5 or 5,6,5) RAW (no headers w...
I would expect that there's some sort of library that I can use in this fashion: int* buffer[720*480]; // read in from file/memory/network stream raw_params params; params.depth = 16; params.width = 720; params.height = 480; params.map = "rgb"; params.interleave = JPEG_RAW_INTERLEAVE_OFF; jpeg_encode(buffer, params) But I can't seem ...
Here is an image: When I load this image in different browsers, it shows differently. Take a look at the result: I spent a lot of time on this, but I can't understand why it happens. I have only theories: something wrong with color profiles, or bad image structure, or something else - maybe special copyright measures? Why is this ...
Hello everybody, now I'm using IJL(Intel Jpeg Library)v1.5 to decode a jpeg file, and I need a BOTTOM-UP bitmap(i.e. uncompressed data). But by default, IJL1.5 will give me a TOP-DOWN bitmap. The IJL doc didn't mention if IJL can provide BOTTOM-UP bitmap. Does anybody can give me a certain answer? If the answer is Yes, how? Thx. ...
I am using IJL(Intel Jpeg Library)v1.51, but there is a very strange problem, 1/2 scaled decoding (which means decoding a image with half original width and height) is slower than whole image decoding. Does anybody know why? And is there any method to accelerate IJL scaled decoding speed? ...