Linear generator

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+

ARM.CMSIS-CV.pdsc

@@ -55,6 +55,12 @@
         <file category="source"   name="Source/arm_cv_common.c"/>
         <file category="source"   name="Source/FeatureDetection/arm_cannysobel.c"/>
         <file category="source"   name="Source/LinearFilters/arm_gaussian.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_sobel_vertical.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_sobel_horizontal.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_linear_common.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_gaussian_5x5.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_gaussian_7x7_buffer_15.c"/>
+        <file category="source"   name="Source/LinearFilters/arm_gaussian_7x7_buffer_31.c"/>
         <file category="source"   name="Source/ColorTransforms/arm_yuv420_to_gray8.c"/>
         <file category="source"   name="Source/ColorTransforms/arm_bgr_8U3C_to_gray8.c"/>
         <file category="source"   name="Source/ColorTransforms/arm_gray8_to_rgb24.c"/>

Include/cv/linear_filters.h

@@ -26,32 +26,116 @@
 #ifndef ARM_CV_LINEAR_FILTER_H
 #define ARM_CV_LINEAR_FILTER_H
 
-
-//this include contain the specific types of the library
+// this include contain the specific types of the library
 #include "arm_cv_types.h"
 
-#ifdef   __cplusplus
+#ifdef __cplusplus
 extern "C"
 {
 #endif
 
+#define ARM_CV_BORDER_NEAREST 1
+#define ARM_CV_BORDER_WRAP 2
+#define ARM_CV_BORDER_REFLECT 3
+
+/**
+ * @brief      Return the scratch size for generic linear filter function using a q15 buffer
+ *
+ * @param[in]     width        The width of the image
+ * @return		  Scratch size in bytes
+ */
+extern uint16_t arm_get_linear_scratch_size_buffer_15(const int width);
+
+/**
+ * @brief      Return the scratch size for generic linear filter function using a q31 buffer
+ *
+ * @param[in]     width        The width of the image
+ * @return		  Scratch size in bytes
+ */
+extern uint16_t arm_get_linear_scratch_size_buffer_31(const int width);
+
+/**
+ * @brief          Gaussian filter applying a 3x3 kernel and using q15 as intermediate values
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Temporary buffer
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_gaussian_filter_3x3_fixp(const arm_cv_image_gray8_t *imageIn, arm_cv_image_gray8_t *imageOut,
+                                         q15_t *scratch, const int8_t borderType);
+
+/**
+ * @brief          Gaussian filter applying a 5x5 kernel and using q15 as intermediate values
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Temporary buffer
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_gaussian_filter_5x5_fixp(const arm_cv_image_gray8_t *imageIn, arm_cv_image_gray8_t *imageOut,
+                                         q15_t *scratch, const int8_t borderType);
 
+/**
+ * @brief          Gaussian filter applying a 7x7 kernel and using q15 as intermediate values
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Temporary buffer
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_gaussian_filter_7x7_buffer_15_fixp(const arm_cv_image_gray8_t *imageIn, arm_cv_image_gray8_t *imageOut,
+                                         q15_t *scratch, const int8_t borderType);
 
+/**
+ * @brief          Gaussian filter applying a 7x7 kernel and using q31 as intermediate values
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Temporary buffer
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_gaussian_filter_7x7_buffer_31_fixp(const arm_cv_image_gray8_t *imageIn, arm_cv_image_gray8_t *imageOut,
+                                            q31_t *scratch, const int8_t borderType);
 
-/**     
- * @brief      Gaussian filter for grayscale data computing in q15
+/**
+ * @brief      Return the scratch size for sobel functions using a q15 buffer
  *
- * @param[in]  ImageIn   The input image
- * @param      ImageOut  The output image
+ * @param[in]     width         The width of the image
+ * @return		  Scratch size in bytes
  */
- extern void arm_gaussian_filter_3x3_fixp(const arm_cv_image_gray8_t* ImageIn,
-                                                arm_cv_image_gray8_t* ImageOut);
+extern uint16_t arm_get_scratch_size_sobel(const int width);
 
+/**
+ * @brief          Sobel filter computing the gradient on the vertical axis
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Buffer of q15
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_sobel_vertical(const arm_cv_image_gray8_t *ImageIn, arm_cv_image_q15_t *ImageOut, q15_t *Buffer,
+                               const int8_t borderType);
 
+/**
+ * @brief          Sobel filter computing the gradient on the horizontal axis
+ *
+ * @param[in]      imageIn     The input image
+ * @param[out]     imageOut    The output image
+ * @param[in,out]  scratch     Buffer of q15
+ * @param[in]      borderType  Type of border to use, supported are Nearest, Wrap and Reflect
+ *
+ */
+extern void arm_sobel_horizontal(const arm_cv_image_gray8_t *imageIn, arm_cv_image_q15_t *imageOut, q15_t *scratch,
+                                 const int8_t borderType);
 
-#ifdef   __cplusplus
+#ifdef __cplusplus
 }
 #endif
 
-
 #endif