image-conversion

问题 I currently have a .h5 file containing grayscale imagery. I need to convert it to a .jpg. Does anybody have any experience with this? Note: I could possible convert the h5 file to a numpy array and then use an external library like pypng to convert that to a png. But I am wondering if there is a more efficient way to convert to an image, and preferrably a .jpg. 回答1: Key ingredients: h5py to read the h5 file. Determine the format of your image and use PIL. Let us suppose it's RGB format (https

问题 As many of you know, there are quite a few websites that sell royalty free graphics. Some sites sell vector graphics (svg) or give you the option to download them as such. I don't have a graphics editor that will support SVG. Currently, I'm working with an older version of Fireworks. I cannot open a SVG file type. (I also cannot afford to purchase PhotoShop or Illustrator software). I'm running Windows on my PC. Questions : What are my options? Is there a SVG to PNG converter? Would the

问题 My goal is to convert a PDF into an image (specifically in TIFF). There is a PDF property called BitsPerComponent And According to description on the page, This property can take the value 1, 2, 4, 8 or 16. Other values are not supported in the PDF Specification Does that mean, 1, 2, 4, 8 or 16 translates to bits per pixel in images? 回答1: Sounds more like bits per color component, where color component is one of either (Alpha)/Red/Green/Blue or Grey. So take the bits per component and

问题 I want to convert SVG images to PNG files with transparent background. I am using below code to convert it using imagick in php,but it gives image with black background. $image = new imagick(); //set transparent background $image->setBackgroundColor(new ImagickPixel('transparent')); $image->setFormat('svg'); $image->readImageBlob(file_get_contents("image.svg")); $image->setImageFormat("png32"); $image->resizeImage(265,195, Imagick::FILTER_LANCZOS, 1); $image->writeImage('result.png'); Can

问题 I want to convert SVG images to PNG files with transparent background. I am using below code to convert it using imagick in php,but it gives image with black background. $image = new imagick(); //set transparent background $image->setBackgroundColor(new ImagickPixel('transparent')); $image->setFormat('svg'); $image->readImageBlob(file_get_contents("image.svg")); $image->setImageFormat("png32"); $image->resizeImage(265,195, Imagick::FILTER_LANCZOS, 1); $image->writeImage('result.png'); Can

问题 So I got the tensorflow object detection API running on Android and I've noticed while going through the code that before processing frames taken from the camera they're is a conversion that goes like this in the CameraActivity.java : imageConverter = new Runnable() { @Override public void run() { ImageUtils.convertYUV420SPToARGB8888(bytes, previewWidth, previewHeight, rgbBytes); } }; I tried to look it up and I only understood the difference between the two types but I couldn't figure why

问题 I have to convert an image to binary for storing it through IPFS and retrieve it again as a viewable image. I should do this with javascript code. Does any body have any clear example of how to do this? Will Base64 help me? Thanks in advance 回答1: Use File Reader: /******************for base 64 *****************************/ function uploadFile(inputElement) { var file = inputElement.files[0]; var reader = new FileReader(); reader.onloadend = function() { console.log('Encoded Base 64 File

问题 Customers of my Django site can upload a print design in: PDF, PSD, AI and EPS. If the filetype they upload is not PDF I want to convert it to PDF. So my question is: How do I convert Photoshop, Illustrator and CorelDraw files to PDF (programmatically)? I tried UniConvertor but it: does not support PSD, distorted my AI inputs, and rejected my EPS inputs. Know any workarounds? I am open to running separate scripts for each filetype. I googled "psd to pdf" but the results all looked like spam.

问题 I'd like to, in code and on demand, convert a 32-bit RGBA Image object (originally a 32-bit PNG) to its 32-bit grayscale counterpart. I've already read several other questions here, as well as many articles online. I've tried using ColorMatrix to do it, but it doesn't seem to handle the alpha very well. Pixels that are entirely opaque grayscale perfectly. Any pixel that is partially transparent seems not to translate well as there are still tinges of color in those pixels. It is enough to be

问题 I am looking for a way to convert a Tiff image into a png so modern browsers can render it. I have looked at Tiffus, but that doesn't look like it is being developed anymore. I have also tried writing a conversion program in C# and sending through JSIL, but that didn't work either. I have also tried using Tiff-js but the sample project isn't working. Does anyone know how to do this? I know I can do it in C#/server-side but we want to try to do it client side. 回答1: I ported LibTIFF to