lib/ccv_image_processing.c

The utilities in this file provides image processing methods that are widely used for image enhancements.

ccv_color_transform

void ccv_color_transform(ccv_dense_matrix_t *a, ccv_dense_matrix_t **b, int type, int flag)

Convert matrix from one color space representation to another.

• a: The input matrix.
• b: The output matrix.
• type: The type of output matrix, if 0, ccv will use the sample type as the input matrix.
• flag: CCV_RGB_TO_YUV to convert from RGB color space to YUV color space.

ccv_saturation

void ccv_saturation(ccv_dense_matrix_t *a, ccv_dense_matrix_t **b, int type, double ds)

Manipulate image’s saturation.

• a: The input matrix.
• b: The output matrix (it is in-place safe).
• type: The type of output matrix, if 0, ccv will use the sample type as the input matrix.
• ds: The coefficient (0: grayscale, 1: original).

ccv_contrast

void ccv_contrast(ccv_dense_matrix_t *a, ccv_dense_matrix_t **b, int type, double ds)

Manipulate image’s contrast.

• a: The input matrix.
• b: The output matrix (it is in-place safe).
• type: The type of output matrix, if 0, ccv will use the sample type as the input matrix.
• ds: The coefficient (0: mean image, 1: original).

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