Recent questions tagged image

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image processing - proportions of a perspective-deformed rectangle

Given a 2d picture of a rectangle distorted by perspective: I know that the shape was originally a rectangle, but ... plans of the rectangle." 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 find Waldo with Mathematica?

This was bugging me over the weekend: What is a good way to solve those Where's Waldo? ['Wally' outside of ... (Waldo is by the cash register): 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 - Accelerating bitmap grayscale conversion, is OpenMP an option in C#?

please help me to make this code parallel using openmp this code is run on button click and the text box is ... site and all programmers 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 - Java: JPanel background not scaling

I am trying to draw an image to a JPanel in java and I have that down, good. My problem now is I am ... scaled to the full size I want? 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 - Pixel access in OpenCV 2.2

Hi I want to use opencv to tell me the pixel values of a blank and white image so the output would look like this 10001 ... "; //END OF ROW } } 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 convert getRGB(x,y) integer pixel to Color(r,g,b,a) in Java?

I have the integer pixel I got from getRGB(x,y), but I don't have any clue about how to convert it to RGBA ... Color(0,200,0,255). Any tips? 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 do I add a custom thumbnail to a .mp4 file using ffmpeg?

I am trying to find the proper ffmpeg command to add a .png or .jpg image to a .mp4 video as a ... please guide me in the right direction. See Question&Answers more detail:os...

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

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426 views

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image - How to create a slowing scroll effect on a scrollbox?

I like to create a smooth slowing scroll effect after panning an image in a scrollbox. Just like panning the ... components, links or samples? 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 scaling - Crop to fit an svg pattern

I have patterns that each have a single image in them. I need the images to scale to the full width or height ... seem to get what I want. 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 - CSS: 100% width or height while keeping aspect ratio?

Currently, with STYLE, I can use width: 100% and auto on the height (or vice versa), but I still can't ... or too tall, respectively. Any ideas? See Question&Answers more detail:os...

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

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472 views

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image processing - Automatic calculation of low and high thresholds for the Canny operation in opencv

In openCV, the low and high thresholds for the canny operator are mandatory: cvCanny(input,output,thresh1, ... calculation for opencv? 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 - How can you determine the file size in JavaScript?

I help moderate a forum online, and on this forum we restrict the size of signatures. At the moment we test ... to augment my current script. See Question&Answers more detail:os...

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

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462 views

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image processing - Is there an easy way to compare how close two colors are to each other?

Is there a way to compare how close two colors are to each other? If to say both of them are blue. At ... assigned to a neat little algorithm. 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 - Java Program to create a PNG waveform for an audio file

How can you convert a Wav file into a PNG waveform image file using Java? java MyProgram.class [path to wav file ... of the wav file passed in. See Question&Answers more detail:os...

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

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459 views

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image - Equivalent of copyTo in Python OpenCV bindings?

OpenCV has the copyTo function, which enables copying a masked area from one Mat to another. http://docs.opencv. ... image, with a binary mask. See Question&Answers more detail:os...

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

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554 views

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image - Java: Filling a BufferedImage with transparent pixels

I have an off-screen BufferedImage, constructed with the type BufferedImage.TYPE_INT_ARGB. It can contain anything, ... of alpha values? See Question&Answers more detail:os...

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

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735 views

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image - Determining JPG quality in Python (PIL)

I am playing around with PIL library in Python and I am wondering how do I determine quality of given JPG image ... ', 'adobe_transform') 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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428 views

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image processing - Reshaping noisy coin into a circle form

I'm doing a coin detection using JavaCV (OpenCV wrapper) but I have a little problem when the coins are ... to break bridges between coins? See Question&Answers more detail:os...

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

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808 views

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image processing - Fastest available algorithm for distance transform

I am looking for the fastest available algorithm for distance transform. According to this site http://homepages ... help is highly appreciated. See Question&Answers more detail:os...

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

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