spinImageGetData usage example

Is there a programming example on the usage of the function:

spinImageGetData

in the spinnnaker C API library?

You'd think it would be straightforward given the definition in the supplied documentation, but the data doesn't seem to get transferred to the array "data" after being malloc-ed as in the supplied example.

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// Assuming image is 640 x 480 resolution. The current pixel format as well as PixelColorFilter indicate the Bayer Tile Mapping for the camera. For example, BayerRG8 is RGGB.

err = spinCameraGetNextImage(hCam, &hResultImage);
size_t imageSize;
spinImageGetBufferSize(hResultImage, &imageSize);

void **data;
data = (void**)malloc(imageSize * sizeof(void*));

spinImageGetData(hResultImage, data);

// Assuming image is 640 x 480
data[0] = Row 0, Column 0 = red pixel (R)
data[1] = Row 0, Column 1 = green pixel (G)
data[640] = Row 1, Column 0 = green pixel (G)
data[641] = Row 1, Column 1 = blue pixel (B)

--------------------------------------------------------------------------

the array data just comes back with a single value (in my case with either one or 2 cameras).

using spinnaker library version 3.1.0.79 and MSVC 2022 (v143)

Official comment

Eric Johnstone

July 15, 2023 00:03

So I followed your suggestion more closely, and it appears to work! The routine "spiImageGetData" appears to return an address. The malloc statement was a misleading usage. Thank you Manuel so very much!

Eric

TDY_Manuel

Community team

July 14, 2023 12:39

Hello Eric,

Could you please try this way?

err = spinCameraGetNextImage(hCam, &hResultImage);
unsigned char *data;
err = spinImageGetData(hResultImage, &data);

Best regards,

Manuel

July 14, 2023 15:35

I tried something similar but it failed because the function prototype specifically wants a pointer to a pointer (**).

spinImageGetData usage example

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