added test goodfeaturetotrack.cpp

Added missed accuracy test for goodFeaturesToTrack functions from opencv_imgproc module
I agree, but do we have access to it from cvtest functionality?

From: Ilya Lavrenov [mailto:notifications@github.com]
Sent: Thursday, December 25, 2014 6:17 PM
To: Itseez/opencv
Cc: Usentsov, Alexander
Subject: Re: [opencv] added test goodfeaturetotrack.cpp (#3540)


In modules/ts/src/ts_func.cpp<https://github.com/Itseez/opencv/pull/3540#discussion-diff-22273854>:

> +

> +/** Threshold types */

> +enum

> +{

> +    tCV_THRESH_BINARY      =0,  /**< value = value > threshold ? max_value : 0       */

> +    tCV_THRESH_BINARY_INV  =1,  /**< value = value > threshold ? 0 : max_value       */

> +    tCV_THRESH_TRUNC       =2,  /**< value = value > threshold ? threshold : value   */

> +    tCV_THRESH_TOZERO      =3,  /**< value = value > threshold ? value : 0           */

> +    tCV_THRESH_TOZERO_INV  =4,  /**< value = value > threshold ? 0 : value           */

> +    tCV_THRESH_MASK        =7,

> +    tCV_THRESH_OTSU        =8, /**< use Otsu algorithm to choose the optimal threshold value;

> +                                 combine the flag with one of the above CV_THRESH_* values */

> +    tCV_THRESH_TRIANGLE    =16  /**< use Triangle algorithm to choose the optimal threshold value;

> +                                 combine the flag with one of the above CV_THRESH_* values, but not

> +                                 with CV_THRESH_OTSU */

> +};

why do you need this enum? I believe the original OpenCV one is enough.

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