vpc_warp_affine

Applicability

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas training product	x
Atlas inference product	x
Atlas 200I/500 A2 inference product	√

Description

Performs affine transformation on the input image.

Prototype

C Prototype

hi_s32 hi_mpi_vpc_warp_affine(hi_vpc_chn chn, hi_transform_matrix *matrix, hi_warp_transform_param *transform_param, hi_u32 *task_id, hi_s32 milli_sec)

Python Function

task_id, ret = acl.himpi.vpc_warp_affine(chn, matrix, transform_param, milli_sec)

Parameters

Parameter	Description
chn	Int, channel ID for image processing. Atlas 350 Accelerator Card: The value range is [0, 256). The maximum number of channels is 256. Atlas A3 training product/Atlas A3 inference product: The value range is [0, 256). The maximum number of channels is 256. Atlas A2 training product/Atlas A2 inference product: The value range is [0, 256). The maximum number of channels is 256. Atlas 200I/500 A2 inference product: The value range is [0, 128). The maximum number of channels is 128.
matrix	Dict, dictionary of transformation matrix information required for affine transformation. For details, see hi_transform_matrix. It can be obtained by calling acl.himpi.vpc_get_affine_transform or acl.himpi.vpc_get_rotation_matrix.
transform_param	Dict, affine transformation parameters. Configure the input and output image information in the hi_warp_transform_param dictionary. For details about the restrictions, see Restrictions..
milli_sec	Int, timeout interval, in milliseconds.

Return Value

Return Value	Description
task_id	Int, task ID, used to identify a task.
ret	Int, error code. 0 indicates success. Other values indicate failure. For details, see VPC Return Codes.

Restrictions

The resolution of the input and output images ranges from 10 x 6 to 4096 x 8192.

The requirements on the input and output image formats are as follows (for details about the restrictions on the image width, height, and memory, see Restrictions):

Version	Restrictions
Atlas 200I/500 A2 inference product	The following input image formats are supported: HI_PIXEL_FORMAT_YUV_400 = 0, // YUV400 8bit HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit HI_PIXEL_FORMAT_RGB_888 = 12, // RGB888 HI_PIXEL_FORMAT_BGR_888 = 13, // BGR888 HI_PIXEL_FORMAT_YUV_PACKED_444 = 11, // YUV444P 8bit HI_PIXEL_FORMAT_YVU_PACKED_444 = 58, // YVU444P 8bit The following output image formats are supported: HI_PIXEL_FORMAT_YUV_400 = 0, // YUV400 8bit HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit HI_PIXEL_FORMAT_RGB_888 = 12, // RGB888 HI_PIXEL_FORMAT_BGR_888 = 13, // BGR888 HI_PIXEL_FORMAT_YUV_PACKED_444 = 11, // YUV444P 8bit HI_PIXEL_FORMAT_YVU_PACKED_444 = 58, // YVU444P 8bit HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7, // YUV422P YUYV 8bit HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8, // YUV422P UYVY 8bit HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9, // YUV422P YVYU 8bit HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10, // YUV422P VYUY 8bit
Atlas 350 Accelerator Card Atlas A2 training product/Atlas A2 inference product Atlas A3 training product/Atlas A3 inference product	The following input image formats are supported: HI_PIXEL_FORMAT_YUV_400 = 0, // YUV400 8bit HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit HI_PIXEL_FORMAT_RGB_888 = 12, // RGB888 HI_PIXEL_FORMAT_BGR_888 = 13, // BGR888 HI_PIXEL_FORMAT_YUV_PACKED_444 = 11, // YUV444P 8bit HI_PIXEL_FORMAT_YVU_PACKED_444 = 58, // YVU444P 8bit HI_PIXEL_FORMAT_YUV400_FP32 = 138, // YUV400 FP32. If this input image format is selected, the output image format must be the same as the input image format. HI_PIXEL_FORMAT_RGB_888_FP32 = 1012, // RGB888 FP32. If this input image format is selected, the output image format must be the same as the input image format. HI_PIXEL_FORMAT_BGR_888_FP32 = 1013, // BGR888 FP32. If this input image format is selected, the output image format must be the same as the input image format. The following output image formats are supported: HI_PIXEL_FORMAT_YUV_400 = 0, // YUV400 8bit HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit HI_PIXEL_FORMAT_RGB_888 = 12, // RGB888 HI_PIXEL_FORMAT_BGR_888 = 13, // BGR888 HI_PIXEL_FORMAT_YUV_PACKED_444 = 11, // YUV444P 8bit HI_PIXEL_FORMAT_YVU_PACKED_444 = 58, // YVU444P 8bit HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7, // YUV422P YUYV 8bit HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8, // YUV422P UYVY 8bit HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9, // YUV422P YVYU 8bit HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10, // YUV422P VYUY 8bit HI_PIXEL_FORMAT_YUV400_FP32 = 138, // YUV400 FP32. If this output image format is selected, the input image format must be the same as the output image format. HI_PIXEL_FORMAT_RGB_888_FP32 = 1012, // RGB888 FP32. If this output image format is selected, the input image format must be the same as the output image format. HI_PIXEL_FORMAT_BGR_888_FP32 = 1013, // BGR888 FP32. If this output image format is selected, the input image format must be the same as the output image format.

Version

Restrictions

Atlas 200I/500 A2 inference product

The following input image formats are supported:

HI_PIXEL_FORMAT_YUV_400 = 0,            // YUV400 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit 
HI_PIXEL_FORMAT_RGB_888 = 12,           // RGB888
HI_PIXEL_FORMAT_BGR_888 = 13,           // BGR888
HI_PIXEL_FORMAT_YUV_PACKED_444 = 11,    // YUV444P 8bit
HI_PIXEL_FORMAT_YVU_PACKED_444 = 58,    // YVU444P 8bit

The following output image formats are supported:

HI_PIXEL_FORMAT_YUV_400 = 0,            // YUV400 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit 
HI_PIXEL_FORMAT_RGB_888 = 12,           // RGB888
HI_PIXEL_FORMAT_BGR_888 = 13,           // BGR888
HI_PIXEL_FORMAT_YUV_PACKED_444 = 11,    // YUV444P 8bit
HI_PIXEL_FORMAT_YVU_PACKED_444 = 58,    // YVU444P 8bit
HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7,    // YUV422P YUYV 8bit 
HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8,    // YUV422P UYVY 8bit
HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9,    // YUV422P YVYU 8bit 
HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10,   // YUV422P VYUY 8bit

Atlas 350 Accelerator Card

Atlas A2 training product/Atlas A2 inference product

Atlas A3 training product/Atlas A3 inference product

The following input image formats are supported:

HI_PIXEL_FORMAT_YUV_400 = 0,            // YUV400 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit 
HI_PIXEL_FORMAT_RGB_888 = 12,           // RGB888
HI_PIXEL_FORMAT_BGR_888 = 13,           // BGR888
HI_PIXEL_FORMAT_YUV_PACKED_444 = 11,    // YUV444P 8bit
HI_PIXEL_FORMAT_YVU_PACKED_444 = 58,    // YVU444P 8bit
HI_PIXEL_FORMAT_YUV400_FP32 = 138,      // YUV400 FP32. If this input image format is selected, the output image format must be the same as the input image format.
HI_PIXEL_FORMAT_RGB_888_FP32 = 1012,    // RGB888 FP32. If this input image format is selected, the output image format must be the same as the input image format.
HI_PIXEL_FORMAT_BGR_888_FP32 = 1013,    // BGR888 FP32. If this input image format is selected, the output image format must be the same as the input image format.

The following output image formats are supported:

HI_PIXEL_FORMAT_YUV_400 = 0,            // YUV400 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_420 = 1, // YUV420SP NV12 8bit   
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_420 = 2, // YUV420SP NV21 8bit 
HI_PIXEL_FORMAT_RGB_888 = 12,           // RGB888
HI_PIXEL_FORMAT_BGR_888 = 13,           // BGR888
HI_PIXEL_FORMAT_YUV_PACKED_444 = 11,    // YUV444P 8bit
HI_PIXEL_FORMAT_YVU_PACKED_444 = 58,    // YVU444P 8bit
HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7,    // YUV422P YUYV 8bit 
HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8,    // YUV422P UYVY 8bit
HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9,    // YUV422P YVYU 8bit 
HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10,   // YUV422P VYUY 8bit
HI_PIXEL_FORMAT_YUV400_FP32 = 138,    // YUV400 FP32. If this output image format is selected, the input image format must be the same as the output image format.
HI_PIXEL_FORMAT_RGB_888_FP32 = 1012,    // RGB888 FP32. If this output image format is selected, the input image format must be the same as the output image format.
HI_PIXEL_FORMAT_BGR_888_FP32 = 1013,    // BGR888 FP32. If this output image format is selected, the input image format must be the same as the output image format.

The task execution requires temporary buffers. Therefore, before calling this API for the first time in each channel, call acl.himpi.vpc_set_chn_workspace to allocate internal buffers.
Due to restrictions on downsampling of YUV images, when the output image format is YUV420SP or YUV422SP, you are advised to set the border making type to border replication mode, to avoid abnormal data on the output image edge.

Parent topic: VPC APIs