Imgproc.cvtColor(sshotmat, sshotmatgray,  Imgproc.COLOR_BGR2GRAY);

更多参数看

public class Imgproc {

private static final int
IPL_BORDER_CONSTANT = 0,
IPL_BORDER_REPLICATE = 1,
IPL_BORDER_REFLECT = 2,
IPL_BORDER_WRAP = 3,
IPL_BORDER_REFLECT_101 = 4,
IPL_BORDER_TRANSPARENT = 5,
CV_INTER_NN = 0,
CV_INTER_LINEAR = 1,
CV_INTER_CUBIC = 2,
CV_INTER_AREA = 3,
CV_INTER_LANCZOS4 = 4,
CV_MOP_ERODE = 0,
CV_MOP_DILATE = 1,
CV_MOP_OPEN = 2,
CV_MOP_CLOSE = 3,
CV_MOP_GRADIENT = 4,
CV_MOP_TOPHAT = 5,
CV_MOP_BLACKHAT = 6,
CV_RETR_EXTERNAL = 0,
CV_RETR_LIST = 1,
CV_RETR_CCOMP = 2,
CV_RETR_TREE = 3,
CV_RETR_FLOODFILL = 4,
CV_CHAIN_APPROX_NONE = 1,
CV_CHAIN_APPROX_SIMPLE = 2,
CV_CHAIN_APPROX_TC89_L1 = 3,
CV_CHAIN_APPROX_TC89_KCOS = 4,
CV_THRESH_BINARY = 0,
CV_THRESH_BINARY_INV = 1,
CV_THRESH_TRUNC = 2,
CV_THRESH_TOZERO = 3,
CV_THRESH_TOZERO_INV = 4,
CV_THRESH_MASK = 7,
CV_THRESH_OTSU = 8,
CV_THRESH_TRIANGLE = 16;

public static final int
LINE_AA = 16,
LINE_8 = 8,
LINE_4 = 4,
CV_BLUR_NO_SCALE = 0,
CV_BLUR = 1,
CV_GAUSSIAN = 2,
CV_MEDIAN = 3,
CV_BILATERAL = 4,
CV_GAUSSIAN_5x5 = 7,
CV_SCHARR = -1,
CV_MAX_SOBEL_KSIZE = 7,
CV_RGBA2mRGBA = 125,
CV_mRGBA2RGBA = 126,
CV_WARP_FILL_OUTLIERS = 8,
CV_WARP_INVERSE_MAP = 16,
CV_SHAPE_RECT = 0,
CV_SHAPE_CROSS = 1,
CV_SHAPE_ELLIPSE = 2,
CV_SHAPE_CUSTOM = 100,
CV_CHAIN_CODE = 0,
CV_LINK_RUNS = 5,
CV_POLY_APPROX_DP = 0,
CV_CONTOURS_MATCH_I1 = 1,
CV_CONTOURS_MATCH_I2 = 2,
CV_CONTOURS_MATCH_I3 = 3,
CV_CLOCKWISE = 1,
CV_COUNTER_CLOCKWISE = 2,
CV_COMP_CORREL = 0,
CV_COMP_CHISQR = 1,
CV_COMP_INTERSECT = 2,
CV_COMP_BHATTACHARYYA = 3,
CV_COMP_HELLINGER = CV_COMP_BHATTACHARYYA,
CV_COMP_CHISQR_ALT = 4,
CV_COMP_KL_DIV = 5,
CV_DIST_MASK_3 = 3,
CV_DIST_MASK_5 = 5,
CV_DIST_MASK_PRECISE = 0,
CV_DIST_LABEL_CCOMP = 0,
CV_DIST_LABEL_PIXEL = 1,
CV_DIST_USER = -1,
CV_DIST_L1 = 1,
CV_DIST_L2 = 2,
CV_DIST_C = 3,
CV_DIST_L12 = 4,
CV_DIST_FAIR = 5,
CV_DIST_WELSCH = 6,
CV_DIST_HUBER = 7,
CV_CANNY_L2_GRADIENT = (1 << 31),
CV_HOUGH_STANDARD = 0,
CV_HOUGH_PROBABILISTIC = 1,
CV_HOUGH_MULTI_SCALE = 2,
CV_HOUGH_GRADIENT = 3,
MORPH_ERODE = 0,
MORPH_DILATE = 1,
MORPH_OPEN = 2,
MORPH_CLOSE = 3,
MORPH_GRADIENT = 4,
MORPH_TOPHAT = 5,
MORPH_BLACKHAT = 6,
MORPH_RECT = 0,
MORPH_CROSS = 1,
MORPH_ELLIPSE = 2,
INTER_NEAREST = 0,
INTER_LINEAR = 1,
INTER_CUBIC = 2,
INTER_AREA = 3,
INTER_LANCZOS4 = 4,
INTER_MAX = 7,
WARP_FILL_OUTLIERS = 8,
WARP_INVERSE_MAP = 16,
INTER_BITS = 5,
INTER_BITS2 = INTER_BITS * 2,
INTER_TAB_SIZE = 1 << INTER_BITS,
INTER_TAB_SIZE2 = INTER_TAB_SIZE * INTER_TAB_SIZE,
DIST_USER = -1,
DIST_L1 = 1,
DIST_L2 = 2,
DIST_C = 3,
DIST_L12 = 4,
DIST_FAIR = 5,
DIST_WELSCH = 6,
DIST_HUBER = 7,
DIST_MASK_3 = 3,
DIST_MASK_5 = 5,
DIST_MASK_PRECISE = 0,
THRESH_BINARY = 0,
THRESH_BINARY_INV = 1,
THRESH_TRUNC = 2,
THRESH_TOZERO = 3,
THRESH_TOZERO_INV = 4,
THRESH_MASK = 7,
THRESH_OTSU = 8,
THRESH_TRIANGLE = 16,
ADAPTIVE_THRESH_MEAN_C = 0,
ADAPTIVE_THRESH_GAUSSIAN_C = 1,
PROJ_SPHERICAL_ORTHO = 0,
PROJ_SPHERICAL_EQRECT = 1,
GC_BGD = 0,
GC_FGD = 1,
GC_PR_BGD = 2,
GC_PR_FGD = 3,
GC_INIT_WITH_RECT = 0,
GC_INIT_WITH_MASK = 1,
GC_EVAL = 2,
DIST_LABEL_CCOMP = 0,
DIST_LABEL_PIXEL = 1,
FLOODFILL_FIXED_RANGE = 1 << 16,
FLOODFILL_MASK_ONLY = 1 << 17,
CC_STAT_LEFT = 0,
CC_STAT_TOP = 1,
CC_STAT_WIDTH = 2,
CC_STAT_HEIGHT = 3,
CC_STAT_AREA = 4,
CC_STAT_MAX = 5,
RETR_EXTERNAL = 0,
RETR_LIST = 1,
RETR_CCOMP = 2,
RETR_TREE = 3,
RETR_FLOODFILL = 4,
CHAIN_APPROX_NONE = 1,
CHAIN_APPROX_SIMPLE = 2,
CHAIN_APPROX_TC89_L1 = 3,
CHAIN_APPROX_TC89_KCOS = 4,
HOUGH_STANDARD = 0,
HOUGH_PROBABILISTIC = 1,
HOUGH_MULTI_SCALE = 2,
HOUGH_GRADIENT = 3,
LSD_REFINE_NONE = 0,
LSD_REFINE_STD = 1,
LSD_REFINE_ADV = 2,
HISTCMP_CORREL = 0,
HISTCMP_CHISQR = 1,
HISTCMP_INTERSECT = 2,
HISTCMP_BHATTACHARYYA = 3,
HISTCMP_HELLINGER = HISTCMP_BHATTACHARYYA,
HISTCMP_CHISQR_ALT = 4,
HISTCMP_KL_DIV = 5,
COLOR_BGR2BGRA = 0,
COLOR_RGB2RGBA = COLOR_BGR2BGRA,
COLOR_BGRA2BGR = 1,
COLOR_RGBA2RGB = COLOR_BGRA2BGR,
COLOR_BGR2RGBA = 2,
COLOR_RGB2BGRA = COLOR_BGR2RGBA,
COLOR_RGBA2BGR = 3,
COLOR_BGRA2RGB = COLOR_RGBA2BGR,
COLOR_BGR2RGB = 4,
COLOR_RGB2BGR = COLOR_BGR2RGB,
COLOR_BGRA2RGBA = 5,
COLOR_RGBA2BGRA = COLOR_BGRA2RGBA,
COLOR_BGR2GRAY = 6,
COLOR_RGB2GRAY = 7,
COLOR_GRAY2BGR = 8,
COLOR_GRAY2RGB = COLOR_GRAY2BGR,
COLOR_GRAY2BGRA = 9,
COLOR_GRAY2RGBA = COLOR_GRAY2BGRA,
COLOR_BGRA2GRAY = 10,
COLOR_RGBA2GRAY = 11,
COLOR_BGR2BGR565 = 12,
COLOR_RGB2BGR565 = 13,
COLOR_BGR5652BGR = 14,
COLOR_BGR5652RGB = 15,
COLOR_BGRA2BGR565 = 16,
COLOR_RGBA2BGR565 = 17,
COLOR_BGR5652BGRA = 18,
COLOR_BGR5652RGBA = 19,
COLOR_GRAY2BGR565 = 20,
COLOR_BGR5652GRAY = 21,
COLOR_BGR2BGR555 = 22,
COLOR_RGB2BGR555 = 23,
COLOR_BGR5552BGR = 24,
COLOR_BGR5552RGB = 25,
COLOR_BGRA2BGR555 = 26,
COLOR_RGBA2BGR555 = 27,
COLOR_BGR5552BGRA = 28,
COLOR_BGR5552RGBA = 29,
COLOR_GRAY2BGR555 = 30,
COLOR_BGR5552GRAY = 31,
COLOR_BGR2XYZ = 32,
COLOR_RGB2XYZ = 33,
COLOR_XYZ2BGR = 34,
COLOR_XYZ2RGB = 35,
COLOR_BGR2YCrCb = 36,
COLOR_RGB2YCrCb = 37,
COLOR_YCrCb2BGR = 38,
COLOR_YCrCb2RGB = 39,
COLOR_BGR2HSV = 40,
COLOR_RGB2HSV = 41,
COLOR_BGR2Lab = 44,
COLOR_RGB2Lab = 45,
COLOR_BGR2Luv = 50,
COLOR_RGB2Luv = 51,
COLOR_BGR2HLS = 52,
COLOR_RGB2HLS = 53,
COLOR_HSV2BGR = 54,
COLOR_HSV2RGB = 55,
COLOR_Lab2BGR = 56,
COLOR_Lab2RGB = 57,
COLOR_Luv2BGR = 58,
COLOR_Luv2RGB = 59,
COLOR_HLS2BGR = 60,
COLOR_HLS2RGB = 61,
COLOR_BGR2HSV_FULL = 66,
COLOR_RGB2HSV_FULL = 67,
COLOR_BGR2HLS_FULL = 68,
COLOR_RGB2HLS_FULL = 69,
COLOR_HSV2BGR_FULL = 70,
COLOR_HSV2RGB_FULL = 71,
COLOR_HLS2BGR_FULL = 72,
COLOR_HLS2RGB_FULL = 73,
COLOR_LBGR2Lab = 74,
COLOR_LRGB2Lab = 75,
COLOR_LBGR2Luv = 76,
COLOR_LRGB2Luv = 77,
COLOR_Lab2LBGR = 78,
COLOR_Lab2LRGB = 79,
COLOR_Luv2LBGR = 80,
COLOR_Luv2LRGB = 81,
COLOR_BGR2YUV = 82,
COLOR_RGB2YUV = 83,
COLOR_YUV2BGR = 84,
COLOR_YUV2RGB = 85,
COLOR_YUV2RGB_NV12 = 90,
COLOR_YUV2BGR_NV12 = 91,
COLOR_YUV2RGB_NV21 = 92,
COLOR_YUV2BGR_NV21 = 93,
COLOR_YUV420sp2RGB = COLOR_YUV2RGB_NV21,
COLOR_YUV420sp2BGR = COLOR_YUV2BGR_NV21,
COLOR_YUV2RGBA_NV12 = 94,
COLOR_YUV2BGRA_NV12 = 95,
COLOR_YUV2RGBA_NV21 = 96,
COLOR_YUV2BGRA_NV21 = 97,
COLOR_YUV420sp2RGBA = COLOR_YUV2RGBA_NV21,
COLOR_YUV420sp2BGRA = COLOR_YUV2BGRA_NV21,
COLOR_YUV2RGB_YV12 = 98,
COLOR_YUV2BGR_YV12 = 99,
COLOR_YUV2RGB_IYUV = 100,
COLOR_YUV2BGR_IYUV = 101,
COLOR_YUV2RGB_I420 = COLOR_YUV2RGB_IYUV,
COLOR_YUV2BGR_I420 = COLOR_YUV2BGR_IYUV,
COLOR_YUV420p2RGB = COLOR_YUV2RGB_YV12,
COLOR_YUV420p2BGR = COLOR_YUV2BGR_YV12,
COLOR_YUV2RGBA_YV12 = 102,
COLOR_YUV2BGRA_YV12 = 103,
COLOR_YUV2RGBA_IYUV = 104,
COLOR_YUV2BGRA_IYUV = 105,
COLOR_YUV2RGBA_I420 = COLOR_YUV2RGBA_IYUV,
COLOR_YUV2BGRA_I420 = COLOR_YUV2BGRA_IYUV,
COLOR_YUV420p2RGBA = COLOR_YUV2RGBA_YV12,
COLOR_YUV420p2BGRA = COLOR_YUV2BGRA_YV12,
COLOR_YUV2GRAY_420 = 106,
COLOR_YUV2GRAY_NV21 = COLOR_YUV2GRAY_420,
COLOR_YUV2GRAY_NV12 = COLOR_YUV2GRAY_420,
COLOR_YUV2GRAY_YV12 = COLOR_YUV2GRAY_420,
COLOR_YUV2GRAY_IYUV = COLOR_YUV2GRAY_420,
COLOR_YUV2GRAY_I420 = COLOR_YUV2GRAY_420,
COLOR_YUV420sp2GRAY = COLOR_YUV2GRAY_420,
COLOR_YUV420p2GRAY = COLOR_YUV2GRAY_420,
COLOR_YUV2RGB_UYVY = 107,
COLOR_YUV2BGR_UYVY = 108,
COLOR_YUV2RGB_Y422 = COLOR_YUV2RGB_UYVY,
COLOR_YUV2BGR_Y422 = COLOR_YUV2BGR_UYVY,
COLOR_YUV2RGB_UYNV = COLOR_YUV2RGB_UYVY,
COLOR_YUV2BGR_UYNV = COLOR_YUV2BGR_UYVY,
COLOR_YUV2RGBA_UYVY = 111,
COLOR_YUV2BGRA_UYVY = 112,
COLOR_YUV2RGBA_Y422 = COLOR_YUV2RGBA_UYVY,
COLOR_YUV2BGRA_Y422 = COLOR_YUV2BGRA_UYVY,
COLOR_YUV2RGBA_UYNV = COLOR_YUV2RGBA_UYVY,
COLOR_YUV2BGRA_UYNV = COLOR_YUV2BGRA_UYVY,
COLOR_YUV2RGB_YUY2 = 115,
COLOR_YUV2BGR_YUY2 = 116,
COLOR_YUV2RGB_YVYU = 117,
COLOR_YUV2BGR_YVYU = 118,
COLOR_YUV2RGB_YUYV = COLOR_YUV2RGB_YUY2,
COLOR_YUV2BGR_YUYV = COLOR_YUV2BGR_YUY2,
COLOR_YUV2RGB_YUNV = COLOR_YUV2RGB_YUY2,
COLOR_YUV2BGR_YUNV = COLOR_YUV2BGR_YUY2,
COLOR_YUV2RGBA_YUY2 = 119,
COLOR_YUV2BGRA_YUY2 = 120,
COLOR_YUV2RGBA_YVYU = 121,
COLOR_YUV2BGRA_YVYU = 122,
COLOR_YUV2RGBA_YUYV = COLOR_YUV2RGBA_YUY2,
COLOR_YUV2BGRA_YUYV = COLOR_YUV2BGRA_YUY2,
COLOR_YUV2RGBA_YUNV = COLOR_YUV2RGBA_YUY2,
COLOR_YUV2BGRA_YUNV = COLOR_YUV2BGRA_YUY2,
COLOR_YUV2GRAY_UYVY = 123,
COLOR_YUV2GRAY_YUY2 = 124,
COLOR_YUV2GRAY_Y422 = COLOR_YUV2GRAY_UYVY,
COLOR_YUV2GRAY_UYNV = COLOR_YUV2GRAY_UYVY,
COLOR_YUV2GRAY_YVYU = COLOR_YUV2GRAY_YUY2,
COLOR_YUV2GRAY_YUYV = COLOR_YUV2GRAY_YUY2,
COLOR_YUV2GRAY_YUNV = COLOR_YUV2GRAY_YUY2,
COLOR_RGBA2mRGBA = 125,
COLOR_mRGBA2RGBA = 126,
COLOR_RGB2YUV_I420 = 127,
COLOR_BGR2YUV_I420 = 128,
COLOR_RGB2YUV_IYUV = COLOR_RGB2YUV_I420,
COLOR_BGR2YUV_IYUV = COLOR_BGR2YUV_I420,
COLOR_RGBA2YUV_I420 = 129,
COLOR_BGRA2YUV_I420 = 130,
COLOR_RGBA2YUV_IYUV = COLOR_RGBA2YUV_I420,
COLOR_BGRA2YUV_IYUV = COLOR_BGRA2YUV_I420,
COLOR_RGB2YUV_YV12 = 131,
COLOR_BGR2YUV_YV12 = 132,
COLOR_RGBA2YUV_YV12 = 133,
COLOR_BGRA2YUV_YV12 = 134,
COLOR_BayerBG2BGR = 46,
COLOR_BayerGB2BGR = 47,
COLOR_BayerRG2BGR = 48,
COLOR_BayerGR2BGR = 49,
COLOR_BayerBG2RGB = COLOR_BayerRG2BGR,
COLOR_BayerGB2RGB = COLOR_BayerGR2BGR,
COLOR_BayerRG2RGB = COLOR_BayerBG2BGR,
COLOR_BayerGR2RGB = COLOR_BayerGB2BGR,
COLOR_BayerBG2GRAY = 86,
COLOR_BayerGB2GRAY = 87,
COLOR_BayerRG2GRAY = 88,
COLOR_BayerGR2GRAY = 89,
COLOR_BayerBG2BGR_VNG = 62,
COLOR_BayerGB2BGR_VNG = 63,
COLOR_BayerRG2BGR_VNG = 64,
COLOR_BayerGR2BGR_VNG = 65,
COLOR_BayerBG2RGB_VNG = COLOR_BayerRG2BGR_VNG,
COLOR_BayerGB2RGB_VNG = COLOR_BayerGR2BGR_VNG,
COLOR_BayerRG2RGB_VNG = COLOR_BayerBG2BGR_VNG,
COLOR_BayerGR2RGB_VNG = COLOR_BayerGB2BGR_VNG,
COLOR_BayerBG2BGR_EA = 135,
COLOR_BayerGB2BGR_EA = 136,
COLOR_BayerRG2BGR_EA = 137,
COLOR_BayerGR2BGR_EA = 138,
COLOR_BayerBG2RGB_EA = COLOR_BayerRG2BGR_EA,
COLOR_BayerGB2RGB_EA = COLOR_BayerGR2BGR_EA,
COLOR_BayerRG2RGB_EA = COLOR_BayerBG2BGR_EA,
COLOR_BayerGR2RGB_EA = COLOR_BayerGB2BGR_EA,
COLOR_COLORCVT_MAX = 139,
INTERSECT_NONE = 0,
INTERSECT_PARTIAL = 1,
INTERSECT_FULL = 2,
TM_SQDIFF = 0,
TM_SQDIFF_NORMED = 1,
TM_CCORR = 2,
TM_CCORR_NORMED = 3,
TM_CCOEFF = 4,
TM_CCOEFF_NORMED = 5,
COLORMAP_AUTUMN = 0,
COLORMAP_BONE = 1,
COLORMAP_JET = 2,
COLORMAP_WINTER = 3,
COLORMAP_RAINBOW = 4,
COLORMAP_OCEAN = 5,
COLORMAP_SUMMER = 6,
COLORMAP_SPRING = 7,
COLORMAP_COOL = 8,
COLORMAP_HSV = 9,
COLORMAP_PINK = 10,
COLORMAP_HOT = 11,
COLORMAP_PARULA = 12;

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