imagefilter

问题 I am trying to do speckle noise removal in satellite SAR image.I am not getting any package which does speckle noise removal in SAR image. I have tried pyradar but it works with python 2.7 and I am working on Anaconda with python 3.5 on windows. Also Rsgislib is available but it is on Linux. Joseph meiring has also given a Lee filter code on github but it fails to work. : https://github.com/reptillicus/LeeFilter Kindly, can anyone share the python script for Speckle Filter or how to proceed

问题 I am trying to learn filters in opencv and running this code. But the problem is that when ı run the code it gives me an almost dark image and warns me with "c:/Users/fazil/Desktop/Yeni Metin Belgesi (3).py:19: RuntimeWarning: overflow encountered in ubyte_scalars result[j,i,a]=int((image[j,i,a]+image[j,i-1,a]+image[j,i+1,a]+image[j+1,i,a]+image[j-1,i,a]+image[j+1,i+1,a]+image[j+1,i-1,a]+image[j-1,i-1,a]+image[j-1,i+1,a])/9)". And if ı comment these out and run code with the lines working

问题 I have a set of anti-aliased greyscale PNG images. I need to know how to programatically revert the anti-aliasing effect and get sharp edges again. I'm using GDI+ but I am less interested in code. I need an algorithm, maybe a convolution filter, if such a matrix can be built. The greyscale images (should) contain only 6 colors (or different shades of grey). This is so that later on I can re-color them using a Color-Lookup filter. However, when the images where saved, Photoshop automatically

问题 I made a webpage where I upload (to a database) and display at same time in latest uploaded manner like any social networking. I added a button "Add Filter", which on clicking opens a new page where I need to display the image associated with that corresponding button and radio buttons with different filter values. I am able to display the image and buttons properly but on clicking the filter buttons the effect does not apply. First I tested the buttons on basic HTML and all worked perfectly.

问题 What is causing this error? Fatal error: Call to undefined function imagefilter() in /var/www/polaroid.php on line 5 1 <?PHP 2 $img_addr = $_GET['image_address']; 3 $img = imagecreatefromjpeg($img_addr); 4 /* everything works as expected without this line */ 5 imagefilter($img, IMG_FILTER_GRAYSCALE); 6 7 if ($img) 8 { /* I moved the header function here so I can see errors in the browser. If I leave it at the top of the file, the browser expects an image and doesn't print the error messages.

问题 I'm a complete beginner in image processing thing so please do excuse me if my question is foolish .Basically I'm trying to develope an image filter app .So, when I googled I came to know that both openCV and openGL can be used for this purpose . But I'm not sure which language would be the best means by speed or efficiency ? Can anyone please enlighten me about this topic a bit? 回答1: OpenGL stands for Open Graphics Library . It is a 3D graphic rendering library. OpenCV stands for Open

问题 Using PIL in Python, I am superimposing a PNG image on top of another, larger image. The smaller image is semi-transparent. I would like for the area behind the smaller image to be blurred on the larger image. The following code blurs a rectangular area: box = (3270, 1150, 4030, 2250) # (x1, y1, x2, y2) ic = outputImage.crop(box) ic = ic.filter(ImageFilter.BoxBlur(20)) outputImage.paste(ic, box) However, I need to blur a rectangular area that has rounded corners . This is what the

问题 I'm trying to blur first image like third one,But I cant do it ! :( header('Content-Type: image/jpeg'); $image = imagecreatefromjpeg('1.jpg'); for ($x=1; $x<=40; $x++){ imagefilter($image, IMG_FILTER_GAUSSIAN_BLUR,999); } imagefilter($image, IMG_FILTER_SMOOTH,99); imagefilter($image, IMG_FILTER_BRIGHTNESS, 10); imagejpeg($image); imagedestroy($image); 回答1: Try to scale down the image and apply the loop with gaussian blur on the resized image. That way you will save some performance on large

问题 I want to crop the image with multiple paths like the below image: . So far, what I have implemented saves all drawn paths into an ArrayList , then I retrieve those cropped paths in another activity. However, every path is adding the first drawn point. Here's my code: public boolean onTouch(View view, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN) { points.clear(); points2 = new ArrayList<Point>(); } Point point = new Point(); point.x = (int) event.getX(); point.y =

问题 This is a follow up to an answer to a question I had previously posted here. I put the suggested answer into an async function: public static async Task<int[]> bitmapToIntArray(Image bitmapImage) { string fileName = "/Images/flowers.jpg"; StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(fileName); IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.Read); BitmapDecoder decoder = await BitmapDecoder.CreateAsync(stream); var pixelData = await decoder