vpc_crop

Applicable Products

Product	Supported (√/x)
Ascend 950PR / Ascend 950DT	√
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

Crops one or more ROIs from an image. This API is asynchronous.

Prototype

C Prototype

        
             hi_s32hi_mpi_vpc_crop(hi_vpc_chnchn,consthi_vpc_pic_info*source_pic,hi_vpc_crop_region_infocrop_info[],hi_u32count,hi_u32*task_id,hi_s32milli_sec);

Python Function

        
             task_id,ret=acl.himpi.vpc_crop(chn,source_pic,crop_info,count,milli_sec)

Parameter Description

Parameter	Description
chn	Int, channel ID for image processing. Ascend 950PR / Ascend 950DT : The value range of this parameter is [0, 256). The maximum number of channels is 256. 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, original image information. For details, see hi_vpc_pic_info. For details about related restrictions, see Restrictions.
crop_info	List, cropped image information list. The length is the same as the value of count. For details, see hi_vpc_crop_region_info.
count	Int, number of crop ROIs. Value range: [1, 256].
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.

Reference

For the API call sequence, see Typical API Call Sequence (Image Resizing).

Restrictions

Version	Restrictions
Atlas inference products	Input image size and format: When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported. When the input image width or height is in the range of (4096, 8192], the supported formats are as follows: The following enum values of hi_pixel_format 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_YUV_SEMIPLANAR_422 = 3, // YUV422SP 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_422 = 4, // YVU422SP 8bit HI_PIXEL_FORMAT_YUV_SEMIPLANAR_444 = 5, // YUV444SP 8bit HI_PIXEL_FORMAT_YVU_SEMIPLANAR_444 = 6, // YVU444SP 8bit HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7, // YUV422Packed YUYV 8bit HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8, // YUV422Packed UYVY 8bit HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9, // YUV422Packed YVYU 8bit HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10, // YUV422Packed VYUY 8bit For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers. For details about the restrictions on the output image resolution, image format, width and height alignment, and buffer size, see Restrictions. Processing a single 1080p image requires a recommended setting of 3 ms timeout, and two 1080p images require a recommended setting of 6 ms timeout. This rule applies to more images. In terms of resolution, a 4K image is equivalent to four 1080p images, and therefore processing a single 3840 x 2160 image requires a recommended setting of 12 ms timeout.
Ascend 950PR / Ascend 950DT Atlas 200I/500 A2 inference products Atlas A2 training products / Atlas A2 inference products Atlas A3 training products / Atlas A3 inference products	For details about the restrictions on the image size, image format, width and height alignment, and buffer size, see Restrictions. Processing a single 1080p image requires a recommended setting of 3 ms timeout, and two 1080p images require a recommended setting of 6 ms timeout. This rule applies to more images. In terms of resolution, a 4K image is equivalent to four 1080p images, and therefore processing a single 3840 x 2160 image requires a recommended setting of 12 ms timeout.

Version

Restrictions

Atlas inference products

Input image size and format:

When the input image resolution is in the range of [10 x 6, 4096 x 4096], the input image formats described in Restrictions on Image Formats, Width and Height Alignment, and Buffers are supported.

When the input image width or height is in the range of (4096, 8192], the supported formats are as follows:

The following enum values of hi_pixel_format 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_YUV_SEMIPLANAR_422 = 3,    // YUV422SP 8bit
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_422 = 4,    // YVU422SP 8bit
HI_PIXEL_FORMAT_YUV_SEMIPLANAR_444 = 5,    // YUV444SP 8bit
HI_PIXEL_FORMAT_YVU_SEMIPLANAR_444 = 6,    // YVU444SP 8bit
HI_PIXEL_FORMAT_YUYV_PACKED_422 = 7,       // YUV422Packed YUYV 8bit
HI_PIXEL_FORMAT_UYVY_PACKED_422 = 8,       // YUV422Packed UYVY 8bit
HI_PIXEL_FORMAT_YVYU_PACKED_422 = 9,       // YUV422Packed YVYU 8bit
HI_PIXEL_FORMAT_VYUY_PACKED_422 = 10,      // YUV422Packed VYUY 8bit

For details about the restrictions on the width and height alignment, buffer size, and image format, see Restrictions on Image Formats, Width and Height Alignment, and Buffers.

For details about the restrictions on the output image resolution, image format, width and height alignment, and buffer size, see Restrictions.
Processing a single 1080p image requires a recommended setting of 3 ms timeout, and two 1080p images require a recommended setting of 6 ms timeout. This rule applies to more images. In terms of resolution, a 4K image is equivalent to four 1080p images, and therefore processing a single 3840 x 2160 image requires a recommended setting of 12 ms timeout.

Ascend 950PR / Ascend 950DT

Atlas 200I/500 A2 inference products

Atlas A2 training products / Atlas A2 inference products

Atlas A3 training products / Atlas A3 inference products

For details about the restrictions on the image size, image format, width and height alignment, and buffer size, see Restrictions.
Processing a single 1080p image requires a recommended setting of 3 ms timeout, and two 1080p images require a recommended setting of 6 ms timeout. This rule applies to more images. In terms of resolution, a 4K image is equivalent to four 1080p images, and therefore processing a single 3840 x 2160 image requires a recommended setting of 12 ms timeout.

Parent topic: VPC APIs