aw/go-resize
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Resolve image artifacts due to wrong coefficient index lookup.

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This commit is contained in:
jst 2014-09-15 11:50:59 +02:00
parent 581d15cb53
commit 0c6a628df5
2 changed files with 12 additions and 12 deletions
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14
converter.go
View File

@ -49,7 +49,7 @@ func resizeGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []in
var rgba [4]int64 var rgba [4]int64
var sum int64 var sum int64
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -96,7 +96,7 @@ func resizeRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []int16,
var rgba [4]int32 var rgba [4]int32
var sum int32 var sum int32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -136,7 +136,7 @@ func resizeRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []i
var rgba [4]int64 var rgba [4]int64
var sum int64 var sum int64
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -184,7 +184,7 @@ func resizeGray(in *image.Gray, out *image.Gray, scale float64, coeffs []int16,
var gray int32 var gray int32
var sum int32 var sum int32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -216,7 +216,7 @@ func resizeGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []i
var gray int64 var gray int64
var sum int64 var sum int64
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -252,7 +252,7 @@ func resizeYCbCr(in *ycc, out *ycc, scale float64, coeffs []int16, offset []int,
var p [3]int32 var p [3]int32
var sum int32 var sum int32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i] coeff := coeffs[ci+i]
if coeff != 0 { if coeff != 0 {
@ -290,7 +290,7 @@ func nearestYCbCr(in *ycc, out *ycc, scale float64, coeffs []bool, offset []int,
var p [3]float32 var p [3]float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i

10
nearest.go
View File

@ -43,7 +43,7 @@ func nearestGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []b
var rgba [4]float32 var rgba [4]float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i
@ -89,7 +89,7 @@ func nearestRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []bool,
var rgba [4]float32 var rgba [4]float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i
@ -128,7 +128,7 @@ func nearestRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []
var rgba [4]float32 var rgba [4]float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i
@ -175,7 +175,7 @@ func nearestGray(in *image.Gray, out *image.Gray, scale float64, coeffs []bool,
var gray float32 var gray float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i
@ -206,7 +206,7 @@ func nearestGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []
var gray float32 var gray float32
var sum float32 var sum float32
start := offset[y] start := offset[y]
ci := (y - newBounds.Min.Y) * filterLength ci := y * filterLength
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
if coeffs[ci+i] { if coeffs[ci+i] {
xi := start + i xi := start + i