Function mindspore::dataset::InitFromPixel

Function Documentation

bool mindspore::dataset::InitFromPixel(const unsigned char *data, LPixelType pixel_type, LDataType data_type, int w, int h, LiteMat &m)

Init Lite Mat from pixel, the conversion of currently supports is rbgaTorgb and rgbaTobgr.

Example
/* Assume p_rgb is a pointer that points to an image with shape (width, height, channel) */
LiteMat lite_mat_dst;
InitFromPixel(p_rgb, LPixelType::RGB, LDataType::UINT8, width, height, lite_mat_dst);

std::cout << lite_mat_dst.width_ << " " << lite_mat_dst.height_ << " " << lite_mat_dst.channel_ << std::endl;

Note

The length of the pointer must be the same as that of the multiplication of w and h.

Parameters

  • data – [in] Input image data.

  • pixel_type – [in] The type of pixel (refer to enum LPixelType).

    • LPixelType.BGR, pixel in BGR type.

    • LPixelType.RGB, pixel in RGB type.

    • LPixelType.RGBA, pixel in RGBA type.

    • LPixelType.RGBA2GRAY, convert image from RGBA to GRAY.

    • LPixelType.RGBA2BGR, convert image from RGBA to BGR.

    • LPixelType.RGBA2RGB, convert image from RGBA to RGB.

    • LPixelType.NV212BGR, convert image from NV21 to BGR.

    • LPixelType.NV122BGR, convert image from NV12 to BGR.

  • data_type – [in] The type of data (refer to LDataType class).

  • w – [in] The width of the output image.

  • h – [in] The length of the output image.

  • m – [in] Used to store image data.

Returns

Return true if transform successfully.