V1.20 test results

Discussion in 'SJ7 Star' started by RBEmerson, Nov 29, 2017.

  1. @Aeciohrq

    @Aeciohrq New Member

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    Thanks!! It worked for me now.
    I like this new feature but it crops the image in comparison with a image with distortion set to off. I did some tests in 720P @30fps with FOV set to Wide, Medium and Narrow as we can see below: Comparison 720P 16_9 FOV Medium Distortion ONxOFF 1.jpg Comparison 720P 16_9 FOV Narrow Distortion ONxOFF 1.jpg Comparison 720P 16_9 FOV Wide Distortion ONxOFF 1.jpg
     
  2. RBEmerson

    RBEmerson Humbled by events

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    That's not a surprise. Four points in the frame will have have no distortion: 0° or top center, 90° or right center, 180° or bottom center, 270° or left center. To remove the distortion, the upper right, lower right, lower left, and upper left corners need to be "pulled out" from the center. That is, those corners will be, in a rectified image, further from the center of the frame than they are now. That means the frame has to be cropped to get back to 16:9 or 4:3 - lost image compared to a "fisheye" frame. Whether the fisheye effect is a problem or not is, of course, the user's choice. I find that shooting outdoors, with few objects really close, comes out satisfactorily. When a lot of close edges are nearby, not so good.
     
  3. Jason

    Jason Moderator

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    A fisheye image like this
    StillRawCap_0005.jpg

    would be transformed into a pin cushion image like this
    StillRawCap_0005_01.jpg
    then cropped down to this

    StillRawCap_0005_03.jpg
    To get more of the image turn off distortion correction and use fisheye correction in post then crop and letterbox

    StillRawCap_0005_04.jpg
     

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  4. RBEmerson

    RBEmerson Humbled by events

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    Nice demo! TNX for putting that out.
     
  5. Jason

    Jason Moderator

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    Thanks.

    I think some of your vids would look good letteboxed

    Sequence #1(1)-000212.jpg
    to

    Sequence #1(3)-000212.jpg
     
  6. RBEmerson

    RBEmerson Humbled by events

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    Nah - letterbox IMHO is a lame fix for getting framing wrong.

    The original image is not too far removed from what I see when riding. The FOV is a little wide (most people have FOV that's 10-15° narrower), but the line of sight is about right. Letterbox wipes that out.

    Sorry to disappoint you, but you asked. [/smile]
     
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  7. @Aeciohrq

    @Aeciohrq New Member

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