Recent questions tagged Image

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image - How to store private pictures and videos in Ruby on Rails

Here's a story: User A should be able to upload an image. User A should be able to set a privacy. (" ... Paperclip, what is a good solution?) 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 - How do I load and edit a bitmap file at the pixel level in Swift for iOS?

I want to manipulate an image at the pixel level in Swift. This question was answered for objective c: How ... the equivalent source for Swift. 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 draw a Line in ImageView on Android?

I'd Like to know how to draw a Line on ImageView as user swipe their finger ? Could any body explain this ? ... any Link to get start on 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 - Grid detection in matlab

I have a grid in a binary image (may be rotated). How can I know approximate formula for that grid using MATLAB? ... plot(px,py,'b+') end 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 - Detect card MinArea Quadrilateral from contour OpenCV

Yet another about detecting card in a picture. I've managed to pretty much isolate the card in the picture, ... the point-line distance formula) 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 - Dealing with Boundary conditions / Halo regions in CUDA

I'm working on image processing with CUDA and i've a doubt about pixel processing. What is often done with ... this problem. 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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image processing - How to use LUT with JavaScript?

I'm new to image processing. I want to use JavaScript to apply effects to images using LUTs (LookUp Tables) or ... , which you can find here. 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 - Print bitmap full page width in thermal dot printer using ESC/POS in java

I'm trying to print an image of 576 pixels width in a thermal printer that supports ESC commands, the problem ... but i need double density) 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 - Text Animation with MATLAB

My simplified problem is to animate some text on a 3D plot. I have a cube, vert = [1 1 0;0 1 0;0 1 1; ... doesn't help (it looks fake!), 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 - python tkinter: how to work with pixels?

using google (and this site) i have seen some similar questions but my problem is still here: "i want to draw ... : Why is Photoimage put slow? See Question&Answers more detail:os...

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

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604 views

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image processing - Impulse, gaussian and salt and pepper noise with OpenCV

I'm studying Image Processing on the famous Gonzales "Digital Image Processing" and talking about image restoration a ... it. What about OpenCV? 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 - "Standard" RGB to Grayscale Conversion

I'm trying to write a converters algorithm that takes a JPEG image and returns its PGM (Portable Gray Map) version ... values. Can you help me? See Question&Answers more detail:os...

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

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560 views

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image - Draw a rectangle in Golang?

I want to draw a mailing label with some rectangles, barcodes, and then finally generate a PNG/PDF file. Is ... primitives - pixel by pixel? See Question&Answers more detail:os...

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

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680 views

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image - How to make Canvas draw area transparent in android?

I would like to make Canvas area transparent because I would like to add an Image behind it so that Canvas ... will be very much helpful.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 - cannot find symbol method with() using picasso library android

i'm getting one issue in android app, I am trying to check already existing app, the app contains implementation('com ... is this is an issue ? See Question&Answers more detail:os...

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

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533 views

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image - Irregular shape detection and measurement in python opencv

I'm attempting to do some image analysis using OpenCV in python, but I think the images themselves are going to ... easier our lives will be! See Question&Answers more detail:os...

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

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385 views

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image - thumbnailImageAtTime: now deprecated - What's the alternative?

Until iOS7 update I was using... UIImage *image = [moviePlayer thumbnailImageAtTime:1.0 timeOption: ... appreciated again. Cheers See Question&Answers more detail:os...

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

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684 views

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image processing - Gaussian filter in scipy

I want to apply a Gaussian filter of dimension 5x5 pixels on an image of 512x512 pixels. I found a scipy ... my Gaussian window is 5x5 pixels? See Question&Answers more detail:os...

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

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579 views

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image processing - Hough transformation vs Contour detection for Rectangle recognition with perspective projection

I made rectangle detection work with contour detection and apply polygon with OpenCv to get location of the rectangle ... That's about it. See Question&Answers more detail:os...

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

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430 views

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image - How to compress Bitmap as JPEG with least quality loss on Android?

This is not a straightforward problem, please read through! I want to manipulate a JPEG file and save it ... they reproduce the same issue. See Question&Answers more detail:os...

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

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665 views

1 answer

image processing - Rectangle detection with Hough transform

I'm trying to implement rectangle detection using the Hough transform, based on this paper. I programmed it ... or polar coordinate space? See Question&Answers more detail:os...

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

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387 views

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image processing - Implementing pinch zoom and drag using Android's build in gesture listener and scale listener

I am trying to implement pinch zoom and drag using Android's gesture listener and scale listener. The problem is ... } } 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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505 views

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image - Best way to access web camera in Java

I need to access web camera using Java. This is what I want to do Access web cam Now the user can ... requirement) also welcome. Please help See Question&Answers more detail:os...

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

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634 views

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image processing - Recommendation for compressing JPG files with ImageMagick

I want to compress a JPG image file with ImageMagick but can't get much difference in size. By default the ... ImageMagick options can I use? See Question&Answers more detail:os...

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

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537 views

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image - Colorize a picture in java

I would like, for a java project, to change the color of a hair modelisation (to change hair color) with ... picture I need to colorize : 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

1 answer

image - How to determine if a photo is corrupted?

I have a requirement where in I have to determine whether a photo is corrupted and accordingly tag it as such. ... can I do this in Delphi. See Question&Answers more detail:os...

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

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609 views

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image processing - C# - Black points recognition from a photo

I have some photos of white pages with some black points drawn on, like this: photo (the points aren't very ... This is for a school assignment. See Question&Answers more detail:os...

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

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658 views

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image - C# Copy bitmap's pixels in the alpha channel on another bitmap

I have two bitmaps, one containing a "normal" picture and another one containing a grayscale image. My goal ... pixel in the grayscale bitmap. See Question&Answers more detail:os...

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

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