I have a windowsform with two pictureboxes to capture images from webcam. The first picturebox display the webcam image and the second picturebox display the captured image.
Then how to write code to get images from the webcam and preview the captured image in the second picturebox. pls help me
advance thanks,
I have already answered this
In windows application how can i save a live image from webcam in picturebox using C#.Net 2.0
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The image is downloaded from a slide captcha and I'm trying to find the gap in this image with OpenCV.
But the gap is missing in the image opened with cv2.imshow() .
I am not familiar with PNG nor OpenCV so I'm so confused right now.
I searched a lot but found nothing useful maybe caused by using wrong keywords.
image opened with Windows Viewer:
image opened with cv2.imshow() :
I'm wondering why the same image in image viewer and OpenCV looks different and is there an easy way to locate the difference?
I am making a Chat application for image sending and downloading. I want to do some animation like in WhatsApp. So, how to show the blurred image? My image is downloaded from server. Please help me.
Scale the image down to a very small size like say 8x8 pixels. Send that data to the client. It should not be more than 4 * 8 * 8 = 256 B or 0.25 KB in size, so sending it to the client will not be a problem no matter how slow the client's connection speed is.
Then scale the received 8x8 image to the resolution of the preview box (e.g. 256x256). You shouldn't need to upsample the 8x8 image if the preview box is a UIImageView (see the link below). This downsampling and successive upsampling of an image "blurs" the image.
To understand how you can resample/rescale an image in iOS, check this link. I am not an iOS developer and cannot help you much in performing this task specifically for iOS.
I think that process is done using the server... As I know, there are 2 copies for a single image..
one image with full quality
other image is a thumbnail of original image.. (low size in capacity )
So.. before downloading the original picture client app calls for the URL of the thumbnail & it downloads very quickly since its size is less..
Meanwhile you can use an async function to download original file in the same time..
That is the process...
Hope it will be help for you!!
I'm trying to capture image using avfoundation framework without Flash and with Flash but i could not capture original image instead gives me black colour image while capturing it without Flash.
With the same code i can capture an image with lighting mode with Auto Flash, In that case i can able to see only part of image which has full light but not actual image.
I've set flashmode to AVCaptureFlashModeAuto.
Even with AVCaptureFlashModeOn captured image shows darker as compared to the original preview.
Help me to get it solved as i'm not able to find any solution.
Thanks.
In my web app (runs in native Safari not UIWebView) I am using canvas to basically allow to draw an image. The user should then be able to save this image to his computer, however it's very important that this process is lossless. That's why I am using the PNG file format.
All this works perfectly on desktop, and in theory it should also work on iOS because by tap and holding the resulting image can be saved to the camera roll. The problem occurs if the image is later imported into the app again. On inspection of the uploaded image type you can see that the image is now in the JPG file format and no longer a pixel perfect representation of the drawing the user made.
Is that a general issue with the camera roll on iOS? Is there any workaround?
YES, The default file format is JPG while saving image to camera roll. You can save a image in PNG format in a native app by writing some code. But in Safari, there may no be possible to save as PNG format.
I want to capture a image from a web cam and i want to print dat captured image in desired size.
consider taking a screenshot programatically and cropping it. if this is not possible, you should talk to the hardware directly by using the driver.
also please provide more info on os, webcam make and programming platform,