Legacy ImageMagick Discussions Archive

I want to get the staff lines position as individual blobs in either of these images: http://i.stack.imgur.com/7LJ25.png http://i.stack.imgur.com/V95Le.png Is this possible? Edit: The regions that I want to select are shown in this image (roughly, I selected them manually): http://i.imgur.com ...

Thanks Fred.
What's the fastest way out of these (in processing time)?

I have: convert a.gif b.gif c.gif e.gif g.gif z.gif +append append.png convert a.gif b.gif c.gif e.gif g.gif z.gif -geometry south +append append.png => will apply geometry south to all images I want to apply different geometries on different images, how can I accomplish that? I want a b c z with ...

Example: http://ge.tt/58Q1SWa/v/0?c

first one is the original, rest are deviations.

I want to create several variations of a given image that have an offset in x or y. The resulting image's size should be 42x54 (this is the original's size also).
The variations should happen within the range in deviation given if possible. The background should be black.
How can this be done?

Hello Anthony,

I meant a practical example, if you can..

Happy new year guys! I'm resizing the samples to be the same size with the "ground truth" images (and they're also properly rotated). compare -ncc performs well on black and white ground truth images and -AE does well on sobel-like effect ground truth images. However both are not performing well if ...

Yes, maybe template matching would be a better fit for this problem.

However you got me lost with the FFT stuff. Can you please elaborate with some examples?
I skimmed through http://www.imagemagick.org/Usage/fourier/ . Are you referring to Fourier NCC like Fred's script?

It's for an app like card.io .

. Thanks anyway Fred.

Anthony, maybe you have an idea?

It's at the bottom of the post, maybe you missed it?

edit: I reread what you wrote. Can't find the original for that one but here's another source one.
http://imageshack.us/a/img6/5190/numbers2.jpg

Hello, I'm trying to OCR information from a bank card. The problem is that it contains embossed numbers and that is not good for OCR. The image below is the closest I've gone but the characters contain holes. I can't just fill holes because they're not exactly complete holes. I've also tried several ...

I want to scan some documents and I want to know when a page is "in the frame" of the camera. What I mean by this is the optimal distance from camera to page document (but without cutting any of the document). I want to run the detection program in a loop, so that the user calibrates the camera ...

whugemann, I want to check whether the image contains mostly text. Like if a webcam is looking at a wall or at a book. Can you please give an example of checking the histogram like you say? anthony, I think that discerning the small disconnected objects in rows would take more time than doing OCR on ...

I want to check if an image contains text. I know I can run OCR on it but I want it to be faster than that. If it contains text then it should OCR, if not it should discard the image.

Any ideas?