pixel Questions
1
Solved
I am trying to change a pixel in a specific video frame using OpenCV in Python.
My current code is:
import cv2
cap = cv2.VideoCapture("plane.avi")
cap.set(1, 2) #2- the second frame of my video
re...
2
Solved
In matlab you can use
cc = bwconncomp(bimg);
pixels = cc.PixelIdxList{i}
To get pixel list of each connected components. What's the python equivalent?
I tried
from skimage import measure
labe...
Farber asked 10/5, 2016 at 19:53
7
Solved
How would I be able to cycle through an image using opencv as if it were a 2d array to get the rgb values of each pixel? Also, would a mat be preferable over an iplimage for this operation?
4
Solved
Due to security limitations at work, I am not allowed to install Chrome extensions. Chrome has a ruler built in to the developer tools, but I can't figure out how to define start and end points lik...
Gosnell asked 21/6, 2016 at 20:53
3
✋ I have done and met all the requirements to build a "product catalog" based on the "Facebook pixel" but it doesn't work.
I have the pixel connected to the catalog
The pixel is well implemented...
Madi asked 19/7, 2018 at 17:26
6
I am trying to get every single color of every single pixel of an image.
My idea was following:
int[] pixels;
BufferedImage image;
image = ImageIO.read(this.getClass.getResources("image.png");
in...
1
Solved
On blank canvas I want to draw a square, pixel by pixel, using Pillow.
I have tried using img.putpixel((30,60), (155,155,55)) to draw one pixel but it doesn't do anything.
from PIL import Image...
Chekiang asked 24/1, 2019 at 11:53
1
I am having a hard time manually converting CIELab to CIELCh with my calculator.
According to http://www.easyrgb.com/en/math.php, the following is a neutral language programming code to get from C...
Yul asked 11/12, 2018 at 22:34
3
I have a .Rmd file and I am trying to create a .docx file via the function pandoc.
I want to have a figure with final resolution of 504x504 pixels (i.e., 7x7inch with 72dpi). Unfortunately, the d...
Rapids asked 19/9, 2013 at 1:9
8
Solved
I wish I would find an answer for this. I have searched and searched and couldn't the right answer. Here is my situation:
In a Mac OS Cocoa Application, I want to draw a pixel (actually a few pixe...
Abductor asked 4/12, 2010 at 23:33
5
Solved
I would like to create a background image for different resolutions in Android. So I need the values (in pixel) for ldpi, mdpi, hdpi,xhdpi and xxhdpi. It is important that the image will not be blu...
Piegari asked 9/11, 2013 at 11:0
4
Solved
I have an array of pixel data for an image. The image I am getting is already rotated to 270 degrees. So I am trying to rotate it again by 90 degrees to have the correct image. I've tried a transpo...
Kappel asked 22/5, 2013 at 6:26
1
Solved
// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575.98px) { ... }
// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) and (max-width: 767.98px)...
Spyglass asked 28/7, 2018 at 0:7
2
Are the viewport in mobile phones based on the screen resolution or the mobile browser?
Here are some popular mobile browser viewport sizes:
-Opera Mobile browser viewport 850px
-iPhone safari br...
Printer asked 26/12, 2016 at 20:21
11
Solved
I'm trying to create some re-usable CSS classes for more consistency and less clutter on my site, and I'm stuck on trying to standardize one thing I use frequently.
I have a container <div> ...
13
Solved
If I open an image with open("image.jpg"), how can I get the RGB values of a pixel assuming I have the coordinates of the pixel?
Then, how can I do the reverse of this? Starting with a blank graph...
9
I just want to know if the pixel unit is something that doesn't change, and if we can convert from pixels to let's say centimeters ?
Kenner asked 27/8, 2009 at 15:44
2
Solved
Is there a way in Linux to create an image and construct it pixel by pixel directly in command line?
I tried imagemagick, but its only possible to create a blank image without set pixels seperate....
6
Solved
I am capturing a MotionEvent for a long click in an Android SurfaceView using a GestureListener. I then need to translate the coordinates of the MotionEvent to canvas coordinates, from which I can ...
Handball asked 28/7, 2011 at 0:23
4
My game have a tiled 2d map. This is a scene screenshot:
I found when I move the camera vertically, there are strange white lines randomly appeared between randomly tiles, See:
I don't know w...
Censor asked 19/3, 2013 at 1:42
3
2
Solved
I am trying to compute the blurriness of an image by using LaplacianFilter.
According to this article: https://www.pyimagesearch.com/2015/09/07/blur-detection-with-opencv/ I have to compute the v...
Aerugo asked 18/1, 2018 at 11:11
5
Solved
What is the fastest way to get the RGB value of each pixel of a BufferedImage?
Right now I am getting the RGB values using two for loops as shown in the code below, but it took too long to get tho...
Houseleek asked 10/4, 2012 at 12:6
5
Solved
I know how to capture a screenshot by using Robot, Windowtester or FEST. I also know how to read a pixel from the screen by using robot.
int x = 10;
int y = 10;
Color px = getPixelColor(int x, in...
Constriction asked 22/6, 2011 at 18:41
2
Solved
I want to perform a color space conversion of my video frame before converting it to an opengl texture with the following code:
struct SwsContext * pSwsCtx = sws_getCachedContext(NULL,width, heigh...
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