vpc_convert_color

Applicability

Product	Supported (√/x)
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas training products	x
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Function Usage

Converts the image format. This API is asynchronous.

Prototype

C Prototype

hi_s32 hi_mpi_vpc_convert_color (hi_vpc_chn chn, const hi_vpc_pic_info *source_pic, hi_vpc_pic_info *dest_pic, hi_u32 *task_id, hi_s32 milli_sec);

Python Function

task_id, ret = acl.himpi.vpc_convert_color(chn, source_pic, dest_pic, milli_sec)

Parameter Description

Parameter	Description
chn	Int, channel ID for image processing. Atlas inference products: The value range of this parameter is [0, 256). The maximum number of channels is 256. Atlas A2 training products/Atlas A2 inference products: The value range of this parameter is [0, 256). The maximum number of channels is 256. Atlas 200I/500 A2 inference products: The value range of this parameter is [0, 128). The maximum number of channels is 128. Atlas A3 training products/Atlas A3 inference products: The value range of this parameter is [0, 256). The maximum number of channels is 256.
source_pic	Dict, source image information. For details, see hi_vpc_pic_info. For details about related restrictions, see Restrictions.
dest_pic	Dict, destination image information. For details, see hi_vpc_pic_info. Specify the width, height, width stride, height stride, memory address, memory size, and format of the output image. The width and height of the output image must be the same as those of the input image. Otherwise, an error is reported. If the width or height of the output image is set to 0, VPC uses the width and height of the input image as the width and height of the output image respectively. In addition, VPC calculates the width stride and height stride based on the alignment requirements, which vary with the image format. For details, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. The width stride and height stride of the output image must meet the alignment requirements, which vary with the image format. For details, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.
milli_sec	Int, timeout interval, in milliseconds. -1: blocking mode. 0: non-blocking mode. > 0: timeout interval (timeout mode). The timeout interval varies with the operating system. The deviation is generally within a time slice of an operating system. For example, if the time slice of an operating system is 4 ms and the value of milli_sec is set to 1, the actual timeout interval ranges from 1 ms to 5 ms. When the CPU load is high, the timeout interval may fluctuate.

Return Value Description

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

Restrictions

Version	Restrictions
Atlas inference products	The input and output image resolutions must be in the range of (10 x 6, 4096 x 4096]. For details about the input image format, output image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. When the input image format is YUV400, the output image format must be the same.
Atlas 200I/500 A2 inference products Atlas A2 training products/Atlas A2 inference products Atlas A3 training products/Atlas A3 inference products	The input and output image resolutions must be in the range of (10 x 6, 4096 x 8192]. For details about the input image format, output image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.

Version

Restrictions

Atlas inference products

The input and output image resolutions must be in the range of (10 x 6, 4096 x 4096].
For details about the input image format, output image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. When the input image format is YUV400, the output image format must be the same.

Atlas 200I/500 A2 inference products

Atlas A2 training products/Atlas A2 inference products

Atlas A3 training products/Atlas A3 inference products

The input and output image resolutions must be in the range of (10 x 6, 4096 x 8192].
For details about the input image format, output image format, width and height alignment, and buffer size, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.

Parent topic: VPC APIs