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Fix saving grayscale WebP images (#2591)

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Adrià Arrufat 2022-05-29 23:53:01 +09:00 committed by GitHub
parent c9a25fda0a
commit 1de7924694
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2 changed files with 4 additions and 1 deletions
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4
dlib/image_saver/save_webp.h
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@ -76,7 +76,7 @@ namespace dlib
auto data = reinterpret_cast<const uint8_t*>(image_data(img)); auto data = reinterpret_cast<const uint8_t*>(image_data(img));
const int width = img.nc(); const int width = img.nc();
const int height = img.nr(); const int height = img.nr();
const int stride = width_step(img); int stride = width_step(img);
if (pixel_traits<pixel_type>::rgb_alpha) if (pixel_traits<pixel_type>::rgb_alpha)
{ {
if (pixel_traits<pixel_type>::bgr_layout) if (pixel_traits<pixel_type>::bgr_layout)
@ -94,8 +94,10 @@ namespace dlib
else else
{ {
// This is some other kind of color image so just save it as an RGB image. // This is some other kind of color image so just save it as an RGB image.
// We also need to recompute the stride in case we were given a grayscale image.
array2d<rgb_pixel> temp; array2d<rgb_pixel> temp;
assign_image(temp, img); assign_image(temp, img);
stride = width_step(temp);
auto data = reinterpret_cast<const uint8_t*>(image_data(temp)); auto data = reinterpret_cast<const uint8_t*>(image_data(temp));
impl::impl_save_webp(filename, data, width, height, stride, quality, impl::webp_type::rgb); impl::impl_save_webp(filename, data, width, height, stride, quality, impl::webp_type::rgb);
} }

1
docs/docs/release_notes.xml
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@ -16,6 +16,7 @@ New Features and Improvements:
Non-Backwards Compatible Changes: Non-Backwards Compatible Changes:
Bug fixes: Bug fixes:
- Fix saving grayscale WebP images (PR #2591)
</current> </current>
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