diff --git a/package/PikaCV/PikaCV_Converter.c b/package/PikaCV/PikaCV_Converter.c
index 54598786b..9602dd89b 100644
--- a/package/PikaCV/PikaCV_Converter.c
+++ b/package/PikaCV/PikaCV_Converter.c
@@ -264,9 +264,15 @@ void PikaCV_Converter_toRGB888(PikaObj* self, PikaObj* image) {
     if (img->format == PikaCV_ImageFormat_Type_RGB565) {
         for (int i = 0; i < img->size; i += 2) {
             uint16_t* p565 = (uint16_t*)&data[i];
+            uint32_t buf888 = 0;
+            uint32_t* pbuf888 = (uint32_t*)&buf888;
+            *pbuf888 = ((*p565 & 0xF800) << 8) | ((*p565 & 0x07E0) << 5) |
+                       ((*p565 & 0x001F) << 3);
             uint32_t* p888 = (uint32_t*)&data_new[i / 2 * 3];
-            *p888 = ((*p565 & 0xF800) << 8) | ((*p565 & 0x07E0) << 5) |
-                    ((*p565 & 0x001F) << 3);
+
+            ((uint8_t*)p888)[0] = ((uint8_t*)pbuf888)[2];
+            ((uint8_t*)p888)[1] = ((uint8_t*)pbuf888)[1];
+            ((uint8_t*)p888)[2] = ((uint8_t*)pbuf888)[0];
         }
         goto exit;
     }
diff --git a/package/PikaCV/PikaCV_Transforms.c b/package/PikaCV/PikaCV_Transforms.c
index 57285abd4..693c9577f 100644
--- a/package/PikaCV/PikaCV_Transforms.c
+++ b/package/PikaCV/PikaCV_Transforms.c
@@ -8,8 +8,8 @@ void PikaCV_Transforms_rotateDown(PikaObj* self, PikaObj* image) {
         pika_assert(0);
         return;
     }
-    if (img->format == PikaCV_ImageFormat_Type_BGR888 ||
-        img->format == PikaCV_ImageFormat_Type_RGB888) {
+    if ((img->format != PikaCV_ImageFormat_Type_BGR888) &&
+        (img->format != PikaCV_ImageFormat_Type_RGB888)) {
         obj_setErrorCode(self, PIKA_RES_ERR_OPERATION_FAILED);
         __platform_printf("unsupported image format\n");
         return;
diff --git a/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Converter.c b/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Converter.c
index 54598786b..9602dd89b 100644
--- a/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Converter.c
+++ b/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Converter.c
@@ -264,9 +264,15 @@ void PikaCV_Converter_toRGB888(PikaObj* self, PikaObj* image) {
     if (img->format == PikaCV_ImageFormat_Type_RGB565) {
         for (int i = 0; i < img->size; i += 2) {
             uint16_t* p565 = (uint16_t*)&data[i];
+            uint32_t buf888 = 0;
+            uint32_t* pbuf888 = (uint32_t*)&buf888;
+            *pbuf888 = ((*p565 & 0xF800) << 8) | ((*p565 & 0x07E0) << 5) |
+                       ((*p565 & 0x001F) << 3);
             uint32_t* p888 = (uint32_t*)&data_new[i / 2 * 3];
-            *p888 = ((*p565 & 0xF800) << 8) | ((*p565 & 0x07E0) << 5) |
-                    ((*p565 & 0x001F) << 3);
+
+            ((uint8_t*)p888)[0] = ((uint8_t*)pbuf888)[2];
+            ((uint8_t*)p888)[1] = ((uint8_t*)pbuf888)[1];
+            ((uint8_t*)p888)[2] = ((uint8_t*)pbuf888)[0];
         }
         goto exit;
     }
diff --git a/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Transforms.c b/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Transforms.c
index 57285abd4..693c9577f 100644
--- a/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Transforms.c
+++ b/port/linux/package/pikascript/pikascript-lib/PikaCV/PikaCV_Transforms.c
@@ -8,8 +8,8 @@ void PikaCV_Transforms_rotateDown(PikaObj* self, PikaObj* image) {
         pika_assert(0);
         return;
     }
-    if (img->format == PikaCV_ImageFormat_Type_BGR888 ||
-        img->format == PikaCV_ImageFormat_Type_RGB888) {
+    if ((img->format != PikaCV_ImageFormat_Type_BGR888) &&
+        (img->format != PikaCV_ImageFormat_Type_RGB888)) {
         obj_setErrorCode(self, PIKA_RES_ERR_OPERATION_FAILED);
         __platform_printf("unsupported image format\n");
         return;