Search found 18 matches

by 7eicher
2014-12-26T08:39:52-07:00
Forum: Users
Topic: IM6 vs 7: Convolve with bias 50% differ
Replies: 4
Views: 4406

Re: IM6 vs 7: Convolve with bias 50% differ

makes sense... thanks!
by 7eicher
2014-12-26T05:43:44-07:00
Forum: Users
Topic: IM6 vs 7: Convolve with bias 50% differ
Replies: 4
Views: 4406

IM6 vs 7: Convolve with bias 50% differ

Hi folks, I was using convert in IM6 to create the edges with the convolve method successfully like that: convert file.jpg -bias 50% -morphology Convolve loG:0x2 edge.jpg Using now IM7 with the exact same command results in a totally white image: magick file.jpg -bias 50% -morphology Convolve loG:0x...
by 7eicher
2014-12-03T15:24:49-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

its not the strong lines, rather the dense point cloud. The cloud of the sharp image is present overall equally around the center. For the blurry image the cloud extremety bounds towards top-left and bottom-right.
by 7eicher
2014-12-03T06:21:20-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Thanks for link. I tested against two similar images, one with slight motion blur and one acceptably sharp. By eye we can see that the magnitudes differ, that we can recognise a clear direction for the blurry image (2nd). For my project, I have thousands of images and dont want to look at every imag...
by 7eicher
2014-11-30T06:25:50-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Thanks Joa for your reply, its not too late :)

FFT looks very promising, could you provide a simple IM command line, to see how such a high frequency image could be created?
by 7eicher
2014-11-11T13:16:42-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

I think to check the high frequencies might be a more robust approach... not yet into it. but thats probably the way
by 7eicher
2014-11-10T12:23:34-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

After all, I go sleeping now... :)
by 7eicher
2014-11-10T02:49:19-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Sorry, are the numbers clear for you?
by 7eicher
2014-11-10T02:37:59-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

I have written a small script in node to perform some tests over files based on the deviation method, you have provided earlier. Here test results for 3 images: DegStep: 15 maxDeg: 180 cropPerc: 100 blurry.jpg 0x1: [ '0.47640', '0.09185' ] blurry.jpg 0x3: [ '0.41651', '0.29287' ] blurry.jpg 0x6: [ '...
by 7eicher
2014-11-10T01:06:39-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Now it works.
by 7eicher
2014-11-09T14:37:52-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Hmm, Dropbox says I dont belonge there. Maybe you need to share these images?
by 7eicher
2014-11-09T14:11:15-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Interesting approach.

I can't see the images. Could you upload them somewhere?
by 7eicher
2014-11-08T09:56:27-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

I should mention that this approach doesnt cover linear-motion-blur in the direction of the image forth or backwards. It only works when moving right,left,up or down.
by 7eicher
2014-11-08T09:55:00-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

The appraoch works geniously, very good Alan! I tested it, each 30deg. and it works out well as long as the motion blur is linear. Thats the deviation for a pretty sharp image: Orig: 0.219353 0: 0.21501 30: 0.212929 60: 0.210584 90: 0.210118 120: 0.210869 150: 0.212393 180: 0.214804 210: 0.213837 24...
by 7eicher
2014-11-08T06:19:58-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 38467

Re: Evaluate Blurriness/Sharpness Factor

Sure I can do. Here is are some sources, cropped and original, exr, tif8 and tif16 (toned): https://www.dropbox.com/sh/tnjkomqf7556vff/AAAf-SQkhd4QqCp_EYFF89ITa?dl=0 I think best would be test based on CRB_7983_tonemapped_crop.tif, 16bit tonemapped, 1000px. I will do some tests with IM and post them...