718c41634f
1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试 2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程 3.重整权利声明文件，重整代码工程，确保最小化侵权风险 Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c
163 lines
4.6 KiB
Markdown
163 lines
4.6 KiB
Markdown
|
|
### image roi crop + convert to ncnn::Mat
|
|
|
|
```
|
|
+--------------+
|
|
| y | /-------/
|
|
| x +-------+ | +-------+|
|
|
| | roih |im_h => | roih
|
|
| +-roiw--+ | +-roiw--+/
|
|
| |
|
|
+-----im_w-----+
|
|
```
|
|
```cpp
|
|
ncnn::Mat in = ncnn::Mat::from_pixels_roi(im.data, ncnn::Mat::PIXEL_RGB, im_w, im_h, x, y, roiw, roih);
|
|
```
|
|
For Android Application, it is :
|
|
```cpp
|
|
ncnn::Mat in = ncnn::Mat::from_android_bitmap_roi(env, image, ncnn::Mat::PIXEL_RGBA2RGB, x, y, roiw, roih);
|
|
```
|
|
|
|
### image roi crop + resize + convert to ncnn::Mat
|
|
|
|
```
|
|
+--------------+
|
|
| y | /----/
|
|
| x +-------+ | +----+|
|
|
| | roih |im_h => | target_h
|
|
| +-roiw--+ | | ||
|
|
| | +----+/
|
|
+-----im_w-----+ target_w
|
|
```
|
|
```cpp
|
|
ncnn::Mat in = ncnn::Mat::from_pixels_roi_resize(im.data, ncnn::Mat::PIXEL_RGB, im_w, im_h, x, y, roiw, roih, target_w, target_h);
|
|
```
|
|
For Android Application, it is :
|
|
```cpp
|
|
ncnn::Mat in = ncnn::Mat::from_android_bitmap_roi_resize(env, image, ncnn::Mat::PIXEL_RGBA2RGB, x, y, roiw, roih, target_w, target_h);
|
|
```
|
|
|
|
### ncnn::Mat export image + offset paste
|
|
|
|
```
|
|
+--------------+
|
|
/-------/ | y |
|
|
+-------+| | x +-------+ |
|
|
| h| => | | h |im_h
|
|
+---w---+/ | +---w---+ |
|
|
| |
|
|
+-----im_w-----+
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
out.to_pixels(data, ncnn::Mat::PIXEL_RGB, im_w * 3);
|
|
```
|
|
|
|
### ncnn::Mat export image + resize + roi paste
|
|
|
|
```
|
|
+--------------+
|
|
/----/ | y |
|
|
+----+| | x +-------+ |
|
|
| h| => | | roih|im_h
|
|
| || | +-roiw--+ |
|
|
+-w--+/ | |
|
|
+-----im_w-----+
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
out.to_pixels_resize(data, ncnn::Mat::PIXEL_RGB, roiw, roih, im_w * 3);
|
|
```
|
|
|
|
### image roi crop + resize
|
|
```
|
|
+--------------+
|
|
| y |
|
|
| x +-------+ | +----+
|
|
| | roih|im_h => | target_h
|
|
| +-roiw--+ | | |
|
|
| | +----+
|
|
+-----im_w-----+ target_w
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
ncnn::resize_bilinear_c3(data, roiw, roih, im_w * 3, outdata, target_w, target_h, target_w * 3);
|
|
```
|
|
|
|
### image resize + offset paste
|
|
```
|
|
+--------------+
|
|
| y |
|
|
+----+ | x +-------+ |
|
|
| h => | | roih |im_h
|
|
| | | +-roiw--+ |
|
|
+-w--+ | |
|
|
+-----im_w-----+
|
|
```
|
|
```cpp
|
|
unsigned char* outdata = im.data + (y * im_w + x) * 3;
|
|
ncnn::resize_bilinear_c3(data, w, h, w * 3, outdata, roiw, roih, im_w * 3);
|
|
```
|
|
|
|
### image roi crop + resize + roi paste
|
|
```
|
|
+--------------+ +-----------------+
|
|
| y | | roiy |
|
|
| x +-------+ | |roix----------+ |
|
|
| | h |im_h => | | target_h|outim_h
|
|
| +---w---+ | | | | |
|
|
| | | +-target_w-+ |
|
|
+-----im_w-----+ +-----outim_w-----+
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
unsigned char* outdata = outim.data + (roiy * outim_w + roix) * 3;
|
|
ncnn::resize_bilinear_c3(data, w, h, im_w * 3, outdata, target_w, target_h, outim_w * 3);
|
|
```
|
|
|
|
### image roi crop + rotate
|
|
```
|
|
+--------------+
|
|
| y |
|
|
| x +-------+ | +---+
|
|
| | < < h |im_h => | ^ |w
|
|
| +---w---+ | | ^ |
|
|
| | +---+
|
|
+-----im_w-----+ h
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
ncnn::kanna_rotate_c3(data, w, h, im_w * 3, outdata, h, w, h * 3, 6);
|
|
```
|
|
|
|
### image rotate + offset paste
|
|
```
|
|
+--------------+
|
|
| y |
|
|
+---+ | x +-------+ |
|
|
| ^ |h => | | < < w |im_h
|
|
| ^ | | +---h---+ |
|
|
+---+ | |
|
|
w +-----im_w-----+
|
|
```
|
|
```cpp
|
|
unsigned char* outdata = im.data + (y * im_w + x) * 3;
|
|
ncnn::kanna_rotate_c3(data, w, h, w * 3, outdata, h, w, im_w * 3, 7);
|
|
```
|
|
|
|
### image roi crop + rotate + roi paste
|
|
```
|
|
+--------------+ +-----------------+
|
|
| y | | roiy |
|
|
| x +-------+ | | roix +---+ |
|
|
| | < < h |im_h => | | ^ w |outim_h
|
|
| +---w---+ | | | ^ | |
|
|
| | | +-h-+ |
|
|
+-----im_w-----+ +-----outim_w-----+
|
|
```
|
|
```cpp
|
|
const unsigned char* data = im.data + (y * im_w + x) * 3;
|
|
unsigned char* outdata = outim.data + (roiy * outim_w + roix) * 3;
|
|
ncnn::kanna_rotate_c3(data, w, h, im_w * 3, outdata, h, w, outim_w * 3, 6);
|
|
```
|