Recent questions tagged image

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image - Crop Rectangle returned by minAreaRect OpenCV [Python]

minAreaRect in OpenCV returns a rotated rectangle. How do I crop this part of the image which is inside the ... code in my answer below. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - How to render a scaled SVG to a QImage?

There is a QSvgRenderer class in QtSvg module which can render image onto QPaintDevice. This one can be QImage. ... files in different sizes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - Multi otsu(multi-thresholding) with openCV

I am trying to carry out multi-thresholding with otsu. The method I am using currently is actually via maximising ... value is: "<<threshold; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - A fast thinning algorithm

I'm looking for a fast thinning algorithm that can be readily implemented using OpenCV. The mention of the ... the right direction would do. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - How to save a png from javascript variable

I have an image encoded in base64 in a javascript variable : data:image/png;base64, base64 data [EDIT] I ... ? Thanks in advance Best regards See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - Google AJAX API - How do I get more than 4 Results?

Im using the google APIs ajax below to get images for particular search terms. This is being done in a WinForms ... figure it out? Anyone know? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - FFT-based 2D convolution and correlation in Python

Is there a FFT-based 2D cross-correlation or convolution function built into scipy (or another popular library) ... this function was included. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - How can you hide information inside a jpg or gif photo?

How can I write some information inside a photo file like jpg or gif without destroying the image? and of ... security/privacy to some extent)! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - Remove unwanted White Space in WebView Android

I have started developing an App using WebView. Actually I am loading an Image with Webview (I like to use the ... image.loadUrl(loadUrl); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - Matplotlib Plots Lose Transparency When Saving as .ps/.eps

I'm having an issue with attempting to save some plots with transparent ellipsoids on them if I attempt to save ... have a solution to this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - Crop black edges with OpenCV

I think it should be a very simple problem, but I cannot find a solution or an effective keyword for search. I ... . OpenCV does not have one? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - Filling holes inside a binary object

I have a problem with filling white holes inside a black coins so that I can have only 0-255 binary image ... see black holes inside each coin) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image loading - Android Volley ImageLoader - BitmapLruCache parameter?

I am having trouble implementing Image cache using the new Volley library. In the presentation, code look like ... =yhv8l9F44qo @14:38 Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - module' object has no attribute 'drawMatches' opencv python

I am just doing an example of feature detection in OpenCV. This example is shown below. It is giving me ... has no attribute 'drawMatches' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - combining two png files in android

I have two png image files that I would like my android app to combine programmatically into one png image file and ... in android and how so? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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521 views

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image - Saving multiple ggplots from ls into one and separate files in R

I have several ggplots as objects on my ls. I want to save them as separate files (although I would also be interested to ... [[i]]) } dev.off() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image - FFT for Spectrograms in Python

How would I go about using Python to read the frequency peaks from a WAV PCM file and then be able to ... the peaks and frequency cutoffs. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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721 views

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image processing - OpenCV Object Detection - Center Point

Given an object on a plain white background, does anybody know if OpenCV provides functionality to easily detect an ... with this image: Image See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - Comparing two histograms

For a small project, I need to compare one image with another - to determine if the images are approximately ... the shape of the distribution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image processing - What is "semantic segmentation" compared to "segmentation" and "scene labeling"?

Is semantic segmentation just a Pleonasm or is there a difference between "semantic segmentation" and "segmentation"? ... than "scene labeling" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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980 views

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image - Convert tiff to jpg in php?

I have a server which holds TIFF images. Most clients can read and display TIFF images, so there's no problem. ... a thing? Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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816 views

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image - matplotlib imshow(): how to animate?

i found this wonderful short tutorial on animation: http://jakevdp.github.io/blog/2012/08/18/matplotlib-animation- ... you in advance. best, See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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705 views

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image - Javascript : get <img> src and set as variable?

If the img below is present <img id="youtubeimg" src="http://i1.ytimg.com/vi/VK4ah66jBvE/0.jpg"/> and ... image source and set as a variable. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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524 views

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image - Android saving Bitmap to SD card

I have a button, and I want when I click on it the image gets saved into the sd card ( or the ... alert but for 2seconds and then disappears See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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image manipulation - Bmp to jpg/png in C#

Is there any way to convert a bmp image to jpg/png without losing the quality in C#? Using Image ... using photoshop with highest quality? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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681 views

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image - html, css - weird invisible margin below pictures

I'm going bananas here, somehow below all of my images in my page there is a gap, a margin which isn't there ... margin: 0; list-style: none; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

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image processing - OpenCV template matching and transparency

What's the way OpenCV handles transparency in image during template matching? The problem is that the template ... wasn't detected correctly). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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552 views

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image - Android: how to convert whole ImageView to Bitmap?

I have my application that is displaying images with different ratio, resized inside (centerInside) imageView. What ... border from some sides. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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