From 04e68d061077af598f69e37db209f8602df4b687 Mon Sep 17 00:00:00 2001 From: "Steinar H. Gunderson" Date: Sun, 16 Nov 2008 14:37:17 +0100 Subject: [PATCH] README adjustments: - Fix an internal inconsistency. - We tried SSE4.1 and it didn't really help that much, so let it be. --- README | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/README b/README index a912395..98b88c3 100644 --- a/README +++ b/README @@ -18,8 +18,8 @@ capable of doing much more than qscale can ever hope to do. Comparison between the two are mainly to provide a well-known reference, and to demonstrate that more specific tools than usually be made faster than generic tools. -qscale is not novel in any way, nor is it perfect (far from it; it's more of a -proof of concept than anything else) -- it is mainly a piece of engineering. +qscale is not novel in any way, nor is it perfect (far from it; it's more like +a proof of concept) -- it is mainly a piece of engineering. However, the following techniques deserve some kind of mention: - qscale recognizes that JPEGs are usually stored in the YCbCr colorspace and @@ -37,9 +37,8 @@ However, the following techniques deserve some kind of mention: - qscale can utilize the SSE instruction set found in almost all modern x86-compatible processors to do more work in the same amount of instructions (It can also use the SSE3 instruction set, although the extra boost on top - of SSE is smaller. In time, it will utilize the SSE extensions known as - SSE4.1, which can help even more.) It takes care to align the image data and - memory accesses on the right boundaries wherever it makes sense. + of SSE is smaller.) It takes care to align the image data and memory + accesses on the right boundaries wherever it makes sense. - qscale recognizes (like almost any decent scaling program) that most practical filter kernels are separable, so scaling can be done in two sequential simpler passes (horizontal and vertical) instead of one. The -- 2.39.2