I understand RGB --- value (0-255)Red,(0-255)Green,(0-255)Blue to form a color.
What is exactly BGR color space ?
How is it different from RGB color space ?
This is probably easy, but I'm trying to convert from a source which provides colors in RGB strings to an output in BGR strings in Java. I've been busting my brain and time on shifting and Long.decode and Long.toHexString.
Feel free to also throw alpha values in there (RGBA - ABGR), though I think I can extend the principles.
I'm trying to reduce the runtime of a routine that converts an RGB image to a YCbCr image. My code looks like this:
cv::Mat input(BGR->m_height, BGR->m_width, CV_8UC3, BGR->m_imageData);
cv::Mat output(BGR->m_height, BGR->m_width, CV_8UC3);
cv::cvtColor(input, output, CV_BGR2YCrCb);
cv::Mat outputArr[3];
outputArr[0] =…
I get this behavior in both Chrome (Developer Tools) and Firefox (Firebug). Note the regex test returns alternating true/false values:
> var re = /.*?\bbl.*\bgr.*/gi;
undefined
> re
/.*?\\bbl.*\\bgr.*/gi
> re.test("Blue-Green");
true
> re.test("Blue-Green");
false
> re.test("Blue-Green");
true
> re.test("Blue-Green");…
I recently started a small personal project (RGB value to BGR value conversion program) in C, and I realised that a function that converts from RGB to BGR can not only perform the conversion but also the inversion. Obviously that means I don't really need two functions rgb2bgr and bgr2rgb. However, does it matter whether I use a…
I recently started a small personal project (RGB value to BGR value conversion program) in C, and I realised that a function that converts from RGB to BGR can not only perform the conversion but also the inversion. Obviously that means I don't really need two functions rgb2bgr and bgr2rgb. However, does it matter whether I use a…
Hi,
I would like to implement an application wide retry system for all entity SaveChanges method calls.
Technologies:
Entity framework 4.0
.Net 4.0
namespace Sample.Data.Store.Entities {
public partial class StoreDB
{
public override int SaveChanges(System.Data.Objects.SaveOptions options)
{
…
HI. I am trying to create simple touch game using EmguCV.Should I use optical flow to determine for interaction between images on screen and with my hand ,if changes of points somewhere on screen more than 100 where the image, it means my hand is over image? But how can I track this new points? I can draw on screen here the…
I have a webcam video recorder program built with python, opencv and ffmpeg
It works ok except that the color of the video is more blue than the reality. The problem seems to come from color format of images.
It seems that OpenCv is giving BGR images and ffmpeg+libx264 is expecting YUV420p. I've read that YUV420p…
I am creating a simple green screen app with Python 2.7.4 but am getting quite slow results. I am currently using PIL 1.1.7 to load and iterate the images and saw huge speed-ups changing from the old getpixel() to the newer load() and pixel access object indexing. However the following loop still takes around 2.5…
I am currently working on an image processing application. The application captures images from a webcam and then does some processing on it. The app needs to be real time responsive (ideally < 50ms to process each request). I have been doing some timing tests on the code I have and I found something very…
Aircel, one of the leading wireless mobile services provider of India has just announced that iPhone 4S will be available to its customers on November 25. You can start pre-booking the phone from November 18 through Aircel website or walking into an Aircel showroom near you.
My multiple calls to Aircel…
I am working with OpenCV and Qt, Opencv use BGR while Qt uses RGB , so I have to swap those 2 bytes for very big images.
There is a better way of doing the following?
I can not think of anything faster but looks so simple and lame...
int width = iplImage->width;
int height =…
I am extending the ImageBox control from EmguCV. The control's Image property can be set to anything implementing the IImage interface.
All of the following implement this interface:
Image<Bgr, Byte>
Image<Ycc, Byte>
Image<Hsv, Byte>
Now I want to call the Draw…
Hi,
Given IE6, an UL-LI list and a background image for the UL container.
<style>
ul {background-image: url(images/bgr.png);}
</style>
...
<ul>
<li>...</li>
...
</ul>
When I load the page, the background is randomly loaded, some parts are…
Hi I am developing a campera capture application. I am currently using EmguCV 2.0. I get an error with the following line of code :
Image image = capture.QueryFrame();
I have added all the required references of EmguCV like Emgu.CV,Emgu.CV.UI, Emgu.CV.ML, Emgu.Util, but…
Is there a way to easily extract the DCT coefficients (and quantization parameters) from encoded images and video? Any decoder software must be using them to decode block-DCT encoded images and video. So I'm pretty sure the decoder knows what they are. Is there a way to expose…
If you going to buy iPhone 4S on a two year contract in USA, Europe or Australia you may not find it expensive. But if you are planning to buy it in any other parts of the world, you will definitely feel the heat of ridiculous iPhone 4S price. In India iPhone 4S costs…
I can use ffmpeg to make screen casts:
ffmpeg -f x11grab -s 1280x800 -i :0.0 -c:v libx264 -framerate 30 -r 30 -crf 18 out.mkv
However the output comes out to be too fast paced. It also happens with GTK RecordMyDesktop if I enable the encode on the fly. So, the…
I've been having trouble with this for a while now, and I haven't gotten any solutions that work yet. Here is the problem, and the specifics:
I am loading a 256x256 uncompressed TGA into a simple OpenGL program that draws a quad on the screen, but when it shows…
I am attempting to write some code that will expediently process video frames. I am receiving the frames as a System.Windows.Media.Imaging.WriteableBitmap. For testing purposes, I am just applying a simple threshold filter that will process a BGRA format image…
I'm a bit new to OpenGL and I've been having a problem with using textures. The texture seems to load fine, but when I run the program, the texture displays shifted a couple pixels to the left, with the section cut off by the shift appearing on the right side. …